林炳文Evankaka原创作品。转载请注明出处http://www.jb51.cc/tag/http://blog.csdn.net/evankaka

摘要：这几天研究了下Ajax注册的方法，通过在注册时输入用户名或邮箱等，就可以判断这个用户是否存在，以免用户来注册，然后提交了，系统才提示该用户名或邮箱不可用。使用Ajax便可实现这一功能，看了网上的都是PHP的，想想索性来写一个SpringMVC+Spring+Mybatis的。文章内容用到了很多技术，包括javascript、jquery、json、e表达式等。

本文工程免费下载

先来看看最终效果：

注册成功的样子：

注册过程中参数的检验：

下面，让我们开始这次的编程吧！

首先，数据库准备，新建一张用户表，并自己插入一些数据

CREATE TABLE
    t_user
    (
        USER_ID INT NOT NULL AUTO_INCREMENT,USER_NAME CHAR(30) NOT NULL,USER_PASSWORD CHAR(10) NOT NULL,USER_EMAIL CHAR(30) NOT NULL,PRIMARY KEY (USER_ID)
    )
    ENGINE=InnoDB DEFAULT CHARSET=utf8;

好，数据库建好了，接下来就是整个工程了。

一、工程整体

项目类型：Dynamic Web Project

开发环境：

Eclipse Java EE IDE for Web Developers.
Version: Luna Service Release 2 (4.4.2)
Build id: 20150219-0600

JDK版本：

jdk1.6.0_45

本文工程免费下载

工程的其它参数：

1、用到的JAR包

json使用的包。这里下载

spring+sprngMvc的包。

mybatis的包

MysqL连接的包

logger的包（日记 打印的）

如下：

2、需要的外部js

jquery-1.11.3.min.js

3、项目结构

这是还没有展开的

然后把各个都展开：

其中src放置java的文件、config放置SpringMVC+Spring+Mybatis的配置文件以及日记打印的log4j.properties

web-inf下面：js用来放置调用 的js文件，lib就是最上面说的jar包的位置，view是各个jsp文件

二、编程

2.1 java代码

这里分了5层，按照标准的web工程来

1、domain层

这里是使用Mybatis Generator自动生成的：User.java

package com.lin.domain;

public class User {
    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column t_user.USER_ID
     *
     * @mbggenerated
     */
    private Integer userId;

    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column t_user.USER_NAME
     *
     * @mbggenerated
     */
    private String userName;

    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column t_user.USER_PASSWORD
     *
     * @mbggenerated
     */
    private String userPassword;

    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database column t_user.USER_EMAIL
     *
     * @mbggenerated
     */
    private String userEmail;

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column t_user.USER_ID
     *
     * @return the value of t_user.USER_ID
     *
     * @mbggenerated
     */
    public Integer getUserId() {
        return userId;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column t_user.USER_ID
     *
     * @param userId the value for t_user.USER_ID
     *
     * @mbggenerated
     */
    public void setUserId(Integer userId) {
        this.userId = userId;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column t_user.USER_NAME
     *
     * @return the value of t_user.USER_NAME
     *
     * @mbggenerated
     */
    public String getUserName() {
        return userName;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column t_user.USER_NAME
     *
     * @param userName the value for t_user.USER_NAME
     *
     * @mbggenerated
     */
    public void setUserName(String userName) {
        this.userName = userName == null ? null : userName.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column t_user.USER_PASSWORD
     *
     * @return the value of t_user.USER_PASSWORD
     *
     * @mbggenerated
     */
    public String getUserPassword() {
        return userPassword;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column t_user.USER_PASSWORD
     *
     * @param userPassword the value for t_user.USER_PASSWORD
     *
     * @mbggenerated
     */
    public void setUserPassword(String userPassword) {
        this.userPassword = userPassword == null ? null : userPassword.trim();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method returns the value of the database column t_user.USER_EMAIL
     *
     * @return the value of t_user.USER_EMAIL
     *
     * @mbggenerated
     */
    public String getUserEmail() {
        return userEmail;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method sets the value of the database column t_user.USER_EMAIL
     *
     * @param userEmail the value for t_user.USER_EMAIL
     *
     * @mbggenerated
     */
    public void setUserEmail(String userEmail) {
        this.userEmail = userEmail == null ? null : userEmail.trim();
    }
}

然后还有一个example文件：UserExample.java

package com.lin.domain;

import java.util.ArrayList;
import java.util.List;

public class UserExample {
    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database table t_user
     *
     * @mbggenerated
     */
    protected String orderByClause;

    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database table t_user
     *
     * @mbggenerated
     */
    protected boolean distinct;

    /**
     * This field was generated by MyBatis Generator.
     * This field corresponds to the database table t_user
     *
     * @mbggenerated
     */
    protected List<Criteria> oredCriteria;

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public UserExample() {
        oredCriteria = new ArrayList<Criteria>();
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public void setOrderByClause(String orderByClause) {
        this.orderByClause = orderByClause;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public String getOrderByClause() {
        return orderByClause;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public void setDistinct(boolean distinct) {
        this.distinct = distinct;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public boolean isDistinct() {
        return distinct;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public List<Criteria> getOredCriteria() {
        return oredCriteria;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public void or(Criteria criteria) {
        oredCriteria.add(criteria);
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public Criteria or() {
        Criteria criteria = createCriteriaInternal();
        oredCriteria.add(criteria);
        return criteria;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public Criteria createCriteria() {
        Criteria criteria = createCriteriaInternal();
        if (oredCriteria.size() == 0) {
            oredCriteria.add(criteria);
        }
        return criteria;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    protected Criteria createCriteriaInternal() {
        Criteria criteria = new Criteria();
        return criteria;
    }

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public void clear() {
        oredCriteria.clear();
        orderByClause = null;
        distinct = false;
    }

    /**
     * This class was generated by MyBatis Generator.
     * This class corresponds to the database table t_user
     *
     * @mbggenerated
     */
    protected abstract static class GeneratedCriteria {
        protected List<Criterion> criteria;

        protected GeneratedCriteria() {
            super();
            criteria = new ArrayList<Criterion>();
        }

        public boolean isValid() {
            return criteria.size() > 0;
        }

        public List<Criterion> getCriteria() {
            return criteria;
        }

        protected void addCriterion(String condition) {
            if (condition == null) {
                throw new RuntimeException("Value for condition cannot be null");
            }
            criteria.add(new Criterion(condition));
        }

        protected void addCriterion(String condition,Object value,String property) {
            if (value == null) {
                throw new RuntimeException("Value for " + property + " cannot be null");
            }
            criteria.add(new Criterion(condition,value));
        }

        protected void addCriterion(String condition,Object value1,Object value2,String property) {
            if (value1 == null || value2 == null) {
                throw new RuntimeException("Between values for " + property + " cannot be null");
            }
            criteria.add(new Criterion(condition,value1,value2));
        }

        public Criteria andUserIdIsNull() {
            addCriterion("USER_ID is null");
            return (Criteria) this;
        }

        public Criteria andUserIdIsNotNull() {
            addCriterion("USER_ID is not null");
            return (Criteria) this;
        }

        public Criteria andUserIdEqualTo(Integer value) {
            addCriterion("USER_ID =",value,"userId");
            return (Criteria) this;
        }

        public Criteria andUserIdNotEqualTo(Integer value) {
            addCriterion("USER_ID <>","userId");
            return (Criteria) this;
        }

        public Criteria andUserIdGreaterThan(Integer value) {
            addCriterion("USER_ID >","userId");
            return (Criteria) this;
        }

        public Criteria andUserIdGreaterThanOrEqualTo(Integer value) {
            addCriterion("USER_ID >=","userId");
            return (Criteria) this;
        }

        public Criteria andUserIdLessThan(Integer value) {
            addCriterion("USER_ID <","userId");
            return (Criteria) this;
        }

        public Criteria andUserIdLessThanOrEqualTo(Integer value) {
            addCriterion("USER_ID <=","userId");
            return (Criteria) this;
        }

        public Criteria andUserIdIn(List<Integer> values) {
            addCriterion("USER_ID in",values,"userId");
            return (Criteria) this;
        }

        public Criteria andUserIdNotIn(List<Integer> values) {
            addCriterion("USER_ID not in","userId");
            return (Criteria) this;
        }

        public Criteria andUserIdBetween(Integer value1,Integer value2) {
            addCriterion("USER_ID between",value2,"userId");
            return (Criteria) this;
        }

        public Criteria andUserIdNotBetween(Integer value1,Integer value2) {
            addCriterion("USER_ID not between","userId");
            return (Criteria) this;
        }

        public Criteria andUserNameIsNull() {
            addCriterion("USER_NAME is null");
            return (Criteria) this;
        }

        public Criteria andUserNameIsNotNull() {
            addCriterion("USER_NAME is not null");
            return (Criteria) this;
        }

        public Criteria andUserNameEqualTo(String value) {
            addCriterion("USER_NAME =","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameNotEqualTo(String value) {
            addCriterion("USER_NAME <>","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameGreaterThan(String value) {
            addCriterion("USER_NAME >","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameGreaterThanOrEqualTo(String value) {
            addCriterion("USER_NAME >=","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameLessThan(String value) {
            addCriterion("USER_NAME <","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameLessThanOrEqualTo(String value) {
            addCriterion("USER_NAME <=","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameLike(String value) {
            addCriterion("USER_NAME like","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameNotLike(String value) {
            addCriterion("USER_NAME not like","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameIn(List<String> values) {
            addCriterion("USER_NAME in","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameNotIn(List<String> values) {
            addCriterion("USER_NAME not in","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameBetween(String value1,String value2) {
            addCriterion("USER_NAME between","userName");
            return (Criteria) this;
        }

        public Criteria andUserNameNotBetween(String value1,String value2) {
            addCriterion("USER_NAME not between","userName");
            return (Criteria) this;
        }

        public Criteria andUserPasswordIsNull() {
            addCriterion("USER_PASSWORD is null");
            return (Criteria) this;
        }

        public Criteria andUserPasswordIsNotNull() {
            addCriterion("USER_PASSWORD is not null");
            return (Criteria) this;
        }

        public Criteria andUserPasswordEqualTo(String value) {
            addCriterion("USER_PASSWORD =","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordNotEqualTo(String value) {
            addCriterion("USER_PASSWORD <>","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordGreaterThan(String value) {
            addCriterion("USER_PASSWORD >","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordGreaterThanOrEqualTo(String value) {
            addCriterion("USER_PASSWORD >=","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordLessThan(String value) {
            addCriterion("USER_PASSWORD <","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordLessThanOrEqualTo(String value) {
            addCriterion("USER_PASSWORD <=","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordLike(String value) {
            addCriterion("USER_PASSWORD like","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordNotLike(String value) {
            addCriterion("USER_PASSWORD not like","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordIn(List<String> values) {
            addCriterion("USER_PASSWORD in","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordNotIn(List<String> values) {
            addCriterion("USER_PASSWORD not in","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordBetween(String value1,String value2) {
            addCriterion("USER_PASSWORD between","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserPasswordNotBetween(String value1,String value2) {
            addCriterion("USER_PASSWORD not between","userPassword");
            return (Criteria) this;
        }

        public Criteria andUserEmailIsNull() {
            addCriterion("USER_EMAIL is null");
            return (Criteria) this;
        }

        public Criteria andUserEmailIsNotNull() {
            addCriterion("USER_EMAIL is not null");
            return (Criteria) this;
        }

        public Criteria andUserEmailEqualTo(String value) {
            addCriterion("USER_EMAIL =","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailNotEqualTo(String value) {
            addCriterion("USER_EMAIL <>","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailGreaterThan(String value) {
            addCriterion("USER_EMAIL >","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailGreaterThanOrEqualTo(String value) {
            addCriterion("USER_EMAIL >=","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailLessThan(String value) {
            addCriterion("USER_EMAIL <","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailLessThanOrEqualTo(String value) {
            addCriterion("USER_EMAIL <=","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailLike(String value) {
            addCriterion("USER_EMAIL like","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailNotLike(String value) {
            addCriterion("USER_EMAIL not like","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailIn(List<String> values) {
            addCriterion("USER_EMAIL in","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailNotIn(List<String> values) {
            addCriterion("USER_EMAIL not in","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailBetween(String value1,String value2) {
            addCriterion("USER_EMAIL between","userEmail");
            return (Criteria) this;
        }

        public Criteria andUserEmailNotBetween(String value1,String value2) {
            addCriterion("USER_EMAIL not between","userEmail");
            return (Criteria) this;
        }
    }

    /**
     * This class was generated by MyBatis Generator.
     * This class corresponds to the database table t_user
     *
     * @mbggenerated do_not_delete_during_merge
     */
    public static class Criteria extends GeneratedCriteria {

        protected Criteria() {
            super();
        }
    }

    /**
     * This class was generated by MyBatis Generator.
     * This class corresponds to the database table t_user
     *
     * @mbggenerated
     */
    public static class Criterion {
        private String condition;

        private Object value;

        private Object secondValue;

        private boolean noValue;

        private boolean singleValue;

        private boolean betweenValue;

        private boolean listValue;

        public String getCondition() {
            return condition;
        }

        public Object getValue() {
            return value;
        }

        public Object getSecondValue() {
            return secondValue;
        }

        public boolean isNoValue() {
            return noValue;
        }

        public boolean isSingleValue() {
            return singleValue;
        }

        public boolean isBetweenValue() {
            return betweenValue;
        }

        public boolean isListValue() {
            return listValue;
        }

        protected Criterion(String condition) {
            super();
            this.condition = condition;
            this.noValue = true;
        }

        protected Criterion(String condition,Object value) {
            super();
            this.condition = condition;
            this.value = value;
            if (value instanceof List<?>) {
                this.listValue = true;
            } else {
                this.singleValue = true;
            }
        }

        protected Criterion(String condition,Object secondValue) {
            super();
            this.condition = condition;
            this.value = value;
            this.secondValue = secondValue;
            this.betweenValue = true;
        }
    }
}

2、dao层

这里是使用Mybatis Generator自动生成的：UserDao.java

package com.lin.dao;

import com.lin.domain.User;
import com.lin.domain.UserExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;

public interface UserDao {
    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    int countByExample(UserExample example);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    int deleteByExample(UserExample example);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    int deleteByPrimaryKey(Integer userId);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    int insert(User record);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    int insertSelective(User record);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    List<User> selectByExample(UserExample example);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    User selectByPrimaryKey(Integer userId);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    int updateByExampleSelective(@Param("record") User record,@Param("example") UserExample example);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    int updateByExample(@Param("record") User record,@Param("example") UserExample example);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    int updateByPrimaryKeySelective(User record);

    /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table t_user
     *
     * @mbggenerated
     */
    int updateByPrimaryKey(User record);
}

3、service层

这里就设计了两个方法，一个查找和一个插入

接口类：

package com.lin.service;

import com.lin.domain.User;
import com.lin.domain.UserExample;

public interface IRegisterService {
	
	public int insert(User record);
	
	public int countByExample(UserExample example);

}

实现类：

package com.lin.service.impl;

import javax.annotation.Resource;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Service;

import com.lin.dao.UserDao;
import com.lin.domain.User;
import com.lin.domain.UserExample;
import com.lin.service.IRegisterService;
@Service("registerService")
public class RegisterServiceImpl implements IRegisterService{
	private static Logger logger = Logger.getLogger(RegisterServiceImpl.class);  
	@Resource
	private UserDao userDao;

	@Override
	public int insert(User record) {	
		try {
			return userDao.insert(record);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return 0;
	}

	@Override
	public int countByExample(UserExample example) {
		try {
			return userDao.countByExample(example);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return 0;
	}

}

2.2 配置文件

1、mappp文件配置

这里是使用Mybatis Generator自动生成的：UserMapper.xml。放在src下面的com.lin.mapper包下

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.lin.dao.UserDao">
  <resultMap id="BaseResultMap" type="com.lin.domain.User">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    <id column="USER_ID" jdbcType="INTEGER" property="userId" />
    <result column="USER_NAME" jdbcType="CHAR" property="userName" />
    <result column="USER_PASSWORD" jdbcType="CHAR" property="userPassword" />
    <result column="USER_EMAIL" jdbcType="CHAR" property="userEmail" />
  </resultMap>
  <sql id="Example_Where_Clause">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    <where>
      <foreach collection="oredCriteria" item="criteria" separator="or">
        <if test="criteria.valid">
          <trim prefix="(" prefixOverrides="and" suffix=")">
            <foreach collection="criteria.criteria" item="criterion">
              <choose>
                <when test="criterion.noValue">
                  and ${criterion.condition}
                </when>
                <when test="criterion.singleValue">
                  and ${criterion.condition} #{criterion.value}
                </when>
                <when test="criterion.betweenValue">
                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                </when>
                <when test="criterion.listValue">
                  and ${criterion.condition}
                  <foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
                    #{listItem}
                  </foreach>
                </when>
              </choose>
            </foreach>
          </trim>
        </if>
      </foreach>
    </where>
  </sql>
  <sql id="Update_By_Example_Where_Clause">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    <where>
      <foreach collection="example.oredCriteria" item="criteria" separator="or">
        <if test="criteria.valid">
          <trim prefix="(" prefixOverrides="and" suffix=")">
            <foreach collection="criteria.criteria" item="criterion">
              <choose>
                <when test="criterion.noValue">
                  and ${criterion.condition}
                </when>
                <when test="criterion.singleValue">
                  and ${criterion.condition} #{criterion.value}
                </when>
                <when test="criterion.betweenValue">
                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                </when>
                <when test="criterion.listValue">
                  and ${criterion.condition}
                  <foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
                    #{listItem}
                  </foreach>
                </when>
              </choose>
            </foreach>
          </trim>
        </if>
      </foreach>
    </where>
  </sql>
  <sql id="Base_Column_List">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    USER_ID,USER_NAME,USER_PASSWORD,USER_EMAIL
  </sql>
  <select id="selectByExample" parameterType="com.lin.domain.UserExample" resultMap="BaseResultMap">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    select
    <if test="distinct">
      distinct
    </if>
    <include refid="Base_Column_List" />
    from t_user
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
    <if test="orderByClause != null">
      order by ${orderByClause}
    </if>
  </select>
  <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    select 
    <include refid="Base_Column_List" />
    from t_user
    where USER_ID = #{userId,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    delete from t_user
    where USER_ID = #{userId,jdbcType=INTEGER}
  </delete>
  <delete id="deleteByExample" parameterType="com.lin.domain.UserExample">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    delete from t_user
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
  </delete>
  <insert id="insert" parameterType="com.lin.domain.User">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    insert into t_user (USER_ID,USER_EMAIL)
    values (#{userId,jdbcType=INTEGER},#{userName,jdbcType=CHAR},#{userPassword,#{userEmail,jdbcType=CHAR})
  </insert>
  <insert id="insertSelective" parameterType="com.lin.domain.User">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    insert into t_user
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="userId != null">
        USER_ID,</if>
      <if test="userName != null">
        USER_NAME,</if>
      <if test="userPassword != null">
        USER_PASSWORD,</if>
      <if test="userEmail != null">
        USER_EMAIL,</if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="userId != null">
        #{userId,</if>
      <if test="userName != null">
        #{userName,</if>
      <if test="userPassword != null">
        #{userPassword,</if>
      <if test="userEmail != null">
        #{userEmail,</if>
    </trim>
  </insert>
  <select id="countByExample" parameterType="com.lin.domain.UserExample" resultType="java.lang.Integer">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    select count(*) from t_user
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
  </select>
  <update id="updateByExampleSelective" parameterType="map">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    update t_user
    <set>
      <if test="record.userId != null">
        USER_ID = #{record.userId,</if>
      <if test="record.userName != null">
        USER_NAME = #{record.userName,</if>
      <if test="record.userPassword != null">
        USER_PASSWORD = #{record.userPassword,</if>
      <if test="record.userEmail != null">
        USER_EMAIL = #{record.userEmail,</if>
    </set>
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByExample" parameterType="map">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    update t_user
    set USER_ID = #{record.userId,USER_NAME = #{record.userName,USER_PASSWORD = #{record.userPassword,USER_EMAIL = #{record.userEmail,jdbcType=CHAR}
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByPrimaryKeySelective" parameterType="com.lin.domain.User">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    update t_user
    <set>
      <if test="userName != null">
        USER_NAME = #{userName,</if>
      <if test="userPassword != null">
        USER_PASSWORD = #{userPassword,</if>
      <if test="userEmail != null">
        USER_EMAIL = #{userEmail,</if>
    </set>
    where USER_ID = #{userId,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.lin.domain.User">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator,do not modify.
    -->
    update t_user
    set USER_NAME = #{userName,USER_PASSWORD = #{userPassword,USER_EMAIL = #{userEmail,jdbcType=CHAR}
    where USER_ID = #{userId,jdbcType=INTEGER}
  </update>
</mapper>

2、mybatis配置,没有其实也行，因为都 在spring中进行配置了，但是保留一下，以免要用，mybatis-config.xml放在config下面

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
</configuration>

3、spingMVC配置

<beans xmlns="http://www.springframework.org/schema/beans"  
    xmlns:context="http://www.springframework.org/schema/context"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"  
     xmlns:mvc="http://www.springframework.org/schema/mvc"    
    xsi:schemaLocation="    
        http://www.springframework.org/schema/mvc   
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd  
        http://www.springframework.org/schema/beans         
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd    
        http://www.springframework.org/schema/mvc      
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd  
        http://www.springframework.org/schema/context     
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">  
    <!-- 把标记了@Controller注解的类转换为bean -->  
    <context:component-scan base-package="com.lin.controller" />  
    <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->  
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />  
   <!-- 静态资源访问（不拦截此目录下的东西的访问） -->    
    <mvc:annotation-driven />    
    <mvc:resources location="/WEB-INF//js/"  mapping="/js/**" /> 
    <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->  
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"  
        p:prefix="/WEB-INF/views/" p:suffix=".jsp"/>  

  
</beans>

4、spring配置：application.xml放在config下面

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="  
           http://www.springframework.org/schema/beans  
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
           http://www.springframework.org/schema/aop  
           http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
           http://www.springframework.org/schema/context  
           http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	<!-- 配置数据源 -->
	<bean id="dataSource"
		class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName" value="com.MysqL.jdbc.Driver" />
		<property name="url" value="jdbc:MysqL://localhost:3306/learning" />
		<property name="username" value="root" />
		<property name="password" value="christmas258@" />
	</bean>

	<!-- 自动扫描了所有的XxxxMapper.xml对应的mapper接口文件，这样就不用一个一个手动配置Mpper的映射了，只要Mapper接口类和Mapper映射文件对应起来就可以了。 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage"
			value="com.lin.dao" />
	</bean>

<!-- 配置Mybatis的文件 ，mapperLocations配置**Mapper.xml文件位置，configLocation配置mybatis-config文件位置-->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.sqlSessionfactorybean">
		<property name="dataSource" ref="dataSource" />
       <property name="mapperLocations" value="classpath*:com/lin/mapper/**/*.xml"/>  
		<property name="configLocation" value="classpath:mybatis-config.xml" />
		<!-- <property name="typeAliasesPackage" value="com.tiantian.ckeditor.model" 
			/> -->
	</bean>

	<!-- 自动扫描注解的bean -->
	<context:component-scan base-package="com.lin.controller" />
		<context:component-scan base-package="com.lin.service.impl" />

</beans>

5、日志打印配置：log4j.properties放在config下面

log4j.rootLogger =DEBEG,stdout,debug
  
  
log4j.appender.stdout = org.apache.log4j.ConsoleAppender  
log4j.appender.stdout.Target = System.out  
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout  
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n  
  
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG 

6、web文件配置，放在WebContent下面

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>JsLearning3</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
        <!-- Spring 容器加载 -->  
    <listener>  
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
    </listener>  
    <context-param>  
        <param-name>contextConfigLocation</param-name>  
        <param-value>classpath:application.xml</param-value>  
    </context-param> 
    
    <!-- 统一设置编码，防止出现中文乱码 -->  
  	<filter>
		<filter-name>Set Character Encoding</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>UTF-8</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>Set Character Encoding</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
  
   <!-- SpringMVC的前端控制器 -->  
    <servlet>  
        <servlet-name>dispatcherServlet</servlet-name>  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
        <!-- 设置自己定义的控制器xml文件 -->  
        <init-param>  
            <param-name>contextConfigLocation</param-name>  
            <param-value>classpath*:spring-servlet.xml</param-value>  
        </init-param>  
        <load-on-startup>1</load-on-startup>  
    </servlet>  
    <!-- Spring MVC配置文件结束 -->  
  
    <!-- 拦截设置 -->  
    <servlet-mapping>  
        <servlet-name>dispatcherServlet</servlet-name>  
        <!-- 由SpringMVC拦截所有请求 -->  
        <url-pattern>/</url-pattern>  
    </servlet-mapping>  
    
    <!-- webAppRootKey：值缺省为webapp.root，当tomcat下部署多个应用时(每个都用到了log4j)， 每个应用的web.xml中都要配置该参数，该参数与Log4j.xml文件中的${webapp.root}
        否则每个应用的webAppRootKey值都相同，就会引起冲突
     -->
    <context-param>
        <param-name>webAppRootKey</param-name>
        <param-value>webApp.root</param-value>
    </context-param>
    <!-- log4jConfigLocation：log4j配置文件存放路径 -->
    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>classpath:log4j.properties</param-value>
    </context-param>
    <!-- 3000表示 开一条watchdog线程每60秒扫描一下配置文件的变化;这样便于日志存放位置的改变 -->  
    <context-param>    
         <param-name>log4jRefreshInterval</param-name>    
         <param-value>3000</param-value>    
    </context-param>   
    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>
</web-app>

三、web页面编写

1、使用到的js编程

var process_request = "<img src='loading.gif' width='16' height='16' border='0' align='absmiddle'>正在数据处理中...";  
var username_empty = "<span style='COLOR:#ff0000'>  × 用户名不能为空!</span>";  
var username_shorter = "<span style='COLOR:#ff0000'> × 用户名长度不能少于 3 个字符。</span>";  
var username_longer = "<span style='COLOR:#ff0000'> × 用户名长度不能大于 30个字符。</span>";  
var username_invalid = "- 用户名只能是由字母数字以及下划线组成。";  
var username_have_register = "<span style='COLOR:#ff0000'> × 用户名已经存在,请重新输入!</span>";  
var username_can_register="<span style='COLOR:#006600'> √ 恭喜您！该用户名可以注册!</span>";  
var password_empty = "<span style='COLOR:#ff0000'> × 登录密码不能为空。</span>";  
var password_shorter_s = "<span style='COLOR:#ff0000'> × 登录密码不能少于 6 个字符。</span>";  
var password_shorter_m = "<span style='COLOR:#ff0000'> × 登录密码不能多于 30 个字符。</span>";  
var confirm_password_invalid = "<span style='COLOR:#ff0000'> × 两次输入密码不一致!</span>";  
var email_empty = "<span style='COLOR:#ff0000'> × 邮箱不能为空！</span>";  
var email_invalid = "<span style='COLOR:#ff0000'> × 邮箱格式出错！</span>";  
var email_have_register = "<span style='COLOR:#ff0000'> × 该邮箱已被注册！ </span>";  
var email_can_register = "<span style='COLOR:#006600'> √ 邮箱可以注册!</span>";  
var agreement_no = "<span style='COLOR:#ff0000'> × 您没有接受协议</span>";  
var agreement_yes= "<span style='COLOR:#006600'> √ 已经接受协议</span>";  
var info_can="<span style='COLOR:#006600'> √ 可以注册!</span>";  
var info_right="<span style='COLOR:#006600'> √ 填写正确!</span>"; 
var name_flag=false;
var email_flag=false;
var password_flag=false;
var accept_flag=false;

$(function(){
	change_submit();	
	if(document.getElementById("agreement").checked){
	    alert("checkBox is checked");
	}
}); 

/*
 * 获取工程的路径
 */
function getRootPath() {
	var pathName = window.location.pathname.substring(1);
	var webName = pathName == '' ? '' : pathName.substring(0,pathName
			.indexOf('/'));
	return window.location.protocol + '//' + window.location.host + '/'
			+ webName + '/';
}
/*
 * 用户名检测
 */
function checkUserName(obj) {
	if (checks(obj.value) == false) {
		showInfo("username_notice",username_invalid);
	} else if (obj.value.length < 1) {
		showInfo("username_notice",username_empty);
	}else if (obj.value.length < 3) {
		showInfo("username_notice",username_shorter);
	} else if(obj.value.length>30){
		showInfo("username_notice",username_longer);
    }else {   	
		// 调用Ajax函数,向服务器端发送查询
        $.ajax({ //一个Ajax过程
    		type: "post",//以post方式与后台沟通
    		url :getRootPath()+"/register/checkUserName",//与此页面沟通
    		dataType:'json',//返回的值以 JSON方式 解释
    		data: 'userName='+obj.value,//发给的数据
    		success: function(json){//如果调用成功
    			if(json.flag){
    				showInfo("username_notice",username_have_register);
    			}else {
    				showInfo("username_notice",username_can_register);
    				name_flag=true;
    				change_submit();
    				return;
    			}
    		} 	
    });	
	}
	name_flag=false;
	change_submit();
}  
/*
 * 用户名检测是否包含非法字符
 */
function checks(t) {
	szMsg = "[#%&\'\"\\,;:=!^@]"
	for (i = 1; i < szMsg.length + 1; i++) {
		if (t.indexOf(szMsg.substring(i - 1,i)) > -1) {
			return false;
		}
	}
	return true;
}
/*
 * 邮箱检测
 */
 function checkEmail(email) {
	var re = /^(\w-*\.*)+@(\w-?)+(\.\w{2,})+$/
	if (email.value.length < 1) {
		showInfo("email_notice",email_empty);
	} else if (!re.test(email.value)) {
		email.className = "FrameDivWarn";
		showInfo("email_notice",email_invalid);		
	} else {
		// 调用Ajax函数,向服务器端发送查询
       $.ajax({ //一个Ajax过程
    		type: "post",//以post方式与后台沟通
    		url :getRootPath()+"/register/checkEmail",//返回的值以 JSON方式 解释
    		data: 'email='+email.value,//发给的数据
    		success: function(json){//如果调用成功
    			if(json.flag){
    				showInfo("email_notice",email_have_register);
    			}else {
    				showInfo("email_notice",email_can_register);
    				email_flag=true;
    				change_submit();
    				return;
    			}
    		} 	
      });
	}
	email_flag=false;
	change_submit();
} 
 


/*
 * 密码检测
 */
 function checkPassword( password )  
 {  
	 if(password.value.length < 1){
		 password_flag=false;
         showInfo("password_notice",password_empty);  
	 }else if ( password.value.length < 6 )  
     {  
		 password_flag=false;
         showInfo("password_notice",password_shorter_s);  
     }  
     else if(password.value.length > 30){  
    	 password_flag=false;
         showInfo("password_notice",password_shorter_m);  
         }  
     else  
     {  
         showInfo("password_notice",info_right);  
     }  
	 change_submit();
 }  
 
 /*
  * 密码确认检测
  */
 function checkConformPassword(conform_password)  
 {  
	 password = $("#password").val();  
	 if (password.length < 1)  {		 
         showInfo("conform_password_notice",password_empty);  
		 
	 } else if ( conform_password.value!= password)  
     {  
         showInfo("conform_password_notice",confirm_password_invalid);  
     }  
     else  
     {     
         showInfo("conform_password_notice",info_right);  
			password_flag=true;
			change_submit();
			return;
     }  
	 password_flag=false;
	change_submit();

 }
 
 /*
  * 检测密码强度检测
  */
 function checkIntensity(pwd)  
 {  
   var Mcolor = "#FFF",Lcolor = "#FFF",Hcolor = "#FFF";  
   var m=0;  
   
   var Modes = 0;  
   for (i=0; i<pwd.length; i++)  
   {  
     var charType = 0;  
     var t = pwd.charCodeAt(i);  
     if (t>=48 && t <=57)  
     {  
       charType = 1;  
     }  
     else if (t>=65 && t <=90)  
     {  
       charType = 2;  
     }  
     else if (t>=97 && t <=122)  
       charType = 4;  
     else  
       charType = 4;  
     Modes |= charType;  
   }  
   
   for (i=0;i<4;i++)  
   {  
     if (Modes & 1) m++;  
       Modes>>>=1;  
   }  
   
   if (pwd.length<=4)  
   {  
     m = 1;  
   }  
   
   switch(m)  
   {  
     case 1 :  
       Lcolor = "2px solid red";  
       Mcolor = Hcolor = "2px solid #DADADA";  
     break;  
     case 2 :  
       Mcolor = "2px solid #f90";  
       Lcolor = Hcolor = "2px solid #DADADA";  
     break;  
     case 3 :  
       Hcolor = "2px solid #3c0";  
       Lcolor = Mcolor = "2px solid #DADADA";  
     break;  
     case 4 :  
       Hcolor = "2px solid #3c0";  
       Lcolor = Mcolor = "2px solid #DADADA";  
     break;  
     default :  
       Hcolor = Mcolor = Lcolor = "";  
     break;  
   }  
   document.getElementById("pwd_lower").style.borderBottom  = Lcolor;  
   document.getElementById("pwd_middle").style.borderBottom = Mcolor;  
   document.getElementById("pwd_high").style.borderBottom   = Hcolor;    
 }
 
//--------------注册协议复选框状态检测---------------------//  
 function checkAgreement(obj){  	 
	if(document.getElementById("agreement").checked){
		 showInfo("agreement_notice",agreement_yes);  
		accept_flag=true;
		change_submit();
		}else{
		showInfo("agreement_notice",agreement_no);  
			
		}
/*	 if($("#agreement").attr("checked")=="checked"){
		 alert('选中');
	 }*/
/*   if (document.formUser.agreement.checked==false)  
   {  
      showInfo("agreement_notice",checkAgreement);  
 } else {  
     showInfo("agreement_notice",info_right);  
     } */ 
 }
 /*
  * 按钮状态设置
  */ 
function change_submit()  
{   	
	if(name_flag&&email_flag&&password_flag&&accept_flag){
		  document.forms['formUser'].elements['Submit1'].disabled = '';  
	}
   else  
     {  
          document.forms['formUser'].elements['Submit1'].disabled = 'disabled';  
     }  
}  
/*
 * 公用程序
 */  
    function showInfo(target,Infos){  
    document.getElementById(target).innerHTML = Infos;  
    }  
    function showclass(target,Infos){  
    document.getElementById(target).className = Infos;  
    }     

2、注册页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<Meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="<%=request.getContextPath()%>/js/jquery-1.11.3.min.js" ></script>
<script type="text/javascript" src="<%=request.getContextPath()%>/js/registerCheck.js" ></script>
<title>Ajax+SpringMVC+Spring+MyBatis+MysqL注册验证实例</title>
</head>
<body>  
<div id="reg">  
<FORM name="formUser"  action="<%=request.getContextPath()%>/register/successed"  method=post>  
  <BR>  
  <TABLE width="100%" align=center border=0>  
    <TBODY>  
      <TR>  
        <TD align=right width="15%"><STRONG>用户名:</STRONG></TD>  
        <TD width="57%"><INPUT id="username" onBlur="checkUserName(this)"   
      name="username">  
            <SPAN id="username_notice" >*</SPAN></TD>  
      </TR>  
      <TR>  
        <TD align=right><STRONG>邮箱:</STRONG></TD>  
        <TD><INPUT id="email" onBlur="checkEmail(this)" name="email">  
            <SPAN id=email_notice >*</SPAN></TD>  
      </TR>  
      <TR>  
        <TD align=right><STRONG>密码:</STRONG></TD>  
        <TD><INPUT id="password" onBlur="checkPassword(this)"   
      onkeyup="checkIntensity(this.value)" type="password" name="password">  
            <SPAN   
      id=password_notice >*</SPAN></TD>  
      </TR>  
      <TR>  
        <TD align=right><STRONG>密码强度:</STRONG></TD>  
        <TD><TABLE cellSpacing=0 cellPadding=1 width=145 border=0>  
          <TBODY>  
            <TR align=middle>  
              <TD id=pwd_lower width="33%">弱</TD>  
              <TD id=pwd_middle width="33%">中</TD>  
              <TD id=pwd_high width="33%">强</TD>  
            </TR>  
          </TBODY>  
        </TABLE></TD>  
      </TR>  
      <TR>  
        <TD align=right><STRONG>确认密码:</STRONG></TD>  
        <TD><INPUT id="conform_password" onBlur="checkConformPassword(this)"   
      type="password" name="confirm_password">  
            <SPAN id=conform_password_notice >*</SPAN></TD>  
      </TR>  
      <TR>  
        <TD> </TD>  
        <TD><LABEL>  
          <INPUT type="checkBox" id="agreement" onclick="checkAgreement(this)">  
          <B>我已看过并接受《<a href="#">用户协议</a>》<SPAN id=agreement_notice >*</SPAN></B></LABEL></TD>  
      </TR>  
      <TR>  
        <TD  ><INPUT type=hidden value=act_register name=act></TD>  
        <TD  ><input type=submit value=确认注册    name="Submit1" class="anniu" disabled></TD>  
      </TR>  
      <TR>  
        <TD colSpan=2> </TD>  
      </TR>  
    </TBODY>  
  </TABLE>  
</FORM>  
</div>           
</body>
</html>

3、注册成功页面

<%@ page language="java" contentType="text/html" pageEncoding="UTF-8"%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<Meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>用户注册成功</title>
</head>
<body>
<center>
<h1><b>欢迎新用户</b></h1>
用户名：${requestScope.username}<br>  
邮箱：${requestScope.email}<br>  
</center>
</body>
</html>

四、Controller编写

使用SpringMVC就得要自己来写Controller，拦截各个请求，处理后再返回给请求者，放在src下的。com.lin.controller

package com.lin.controller;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONObject;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import com.lin.domain.User;
import com.lin.domain.UserExample;
import com.lin.domain.UserExample.Criteria;
import com.lin.service.IRegisterService;

@Controller
public class RegisterController {
	private static Logger logger = Logger.getLogger(RegisterController.class);    
	@Resource
	private IRegisterService registerService;	
	
	@RequestMapping({"/register","/"})
	public String register(){  
		return "register";
	}
	@RequestMapping(value="/register/checkUserName",method = RequestMethod.POST)
	public String checkUserName(HttpServletRequest request,HttpServletResponse response) throws IOException{
		String userName=(String)request.getParameter("userName");			
		//检验用户名是否存在
		UserExample userExample=new UserExample();
		Criteria conditionCri = userExample.createCriteria();
		conditionCri.andUserNameEqualTo(userName);		
	    int num=registerService.countByExample(userExample);
	    //用户名是否存在的标志
	    boolean flag=false;
	    if(num>0){
	    	flag=true;
	    }		
		//将数据转换成json
		Map<String,Object> map = new HashMap<String,Object>();  
		map.put("flag",flag);  		  
		String json = JSONObject.fromObject(map).toString(); 		
		//将数据返回
		response.setCharacterEncoding("UTF-8");
		response.flushBuffer();
		response.getWriter().write(json);
		response.getWriter().flush();  
		response.getWriter().close();
		return null;
	}
	
	@RequestMapping(value="/register/checkEmail",method = RequestMethod.POST)
	public String checkEmail(HttpServletRequest request,HttpServletResponse response) throws IOException{
		String email=(String)request.getParameter("email");			
		//检验邮箱是否存在
		UserExample userExample=new UserExample();
		Criteria conditionCri = userExample.createCriteria();
		conditionCri.andUserEmailEqualTo(email);		
	    int num=registerService.countByExample(userExample);
	    //用户名是否存在的标志
	    boolean flag=false;
	    if(num>0){
	    	flag=true;
	    }		
		//将数据转换成json
		Map<String,flag);  		  
		String json = JSONObject.fromObject(map).toString(); 		
		//将数据返回
		response.setCharacterEncoding("UTF-8");
		response.flushBuffer();
		response.getWriter().write(json);
		response.getWriter().flush();  
		response.getWriter().close();
		return null;
	}
	@RequestMapping(value="/register/successed")
	public ModelAndView  successed(HttpServletRequest request,HttpServletResponse response) throws IOException{
		String username=(String)request.getParameter("username");	
		String email=(String)request.getParameter("email");		
		String password=(String)request.getParameter("password");
		if(username==null||email==null||password==null){
			return new ModelAndView("redirect:/register"); 
		}
		//新增用户插入数据库
		User user=new User();
		user.setUserName(username);
		user.setUserEmail(email);
		user.setUserPassword(password);
		registerService.insert(user);		
		//将数据转换成
		Map<String,Object>();  
		map.put("username",username);  
		map.put("email",email);  
		map.put("password",password);  
/*		String json = JSONObject.fromObject(map).toString(); 		
		//将数据返回
		response.setCharacterEncoding("UTF-8");
		response.flushBuffer();
		response.getWriter().write(json);
		response.getWriter().flush();  
		response.getWriter().close();*/
		return new ModelAndView("successed",map);  
	}
	

}

五、结果分析

1、运行

2、然后来看看打印出来的sql语句：

这是要验证用户名：

每次输入后，移开鼠标后就验证，并返回结果

这是在验证邮箱：

3、最后还要看看数据库数据进去了没有：

这是还没注册之前的：

这是数据成功插入之后的”，我做了很多次，所以数据有点多。

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原文链接：/springmvc/546191.html