Object转XML && XML转Object

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Object转XML && XML转Object 测试类：

package com.insist.objectxml;

import com.insist.objectxml.common.JaxbMapper;
import com.insist.objectxml.person.Body;
import com.insist.objectxml.person.Person;

/**
 * 描述：测试对象——>XML || XML——>对象<br>
 * 作者：liqijing <br>
 * 修改日期：2015-4-6下午07:38:17 <br>
 * E-mail: lijinginsistsmile@163.com <br>
 */
public class ObjectXml {
	
	
	public static void main(String[] args) {
		String reqXml = getXml();
		System.out.println("输出XML："+"\n"+reqXml);
		
		System.out.println("解析XML-->Object"+"===========================================");
		Person person = getPerson(reqXml);
		System.out.println("id="+person.getPerId()+",name="+person.getPerName()+",age="+person.getPerAge()+",sex="+person.getPerSex()+",email="+person.getEmail());
	}
	
	
	/**
	 * 方法名称: getXml<br>
	 * 描述： Object --> XML
	 * 作者: liqijing
	 * 修改日期：2015-4-6下午07:46:03
	 * @param body
	 * @param encoding
	 * @return
	 */
	public static String getXml(){
		Body body = new Body();
		body.setPerson(initPerson());
		String reqXml = JaxbMapper.toXml(body,"GBK") ;
		if(reqXml == null){
			return "组装XML出错！" ; 
		}
		return reqXml ;
	}
	
	
	/**
	 * 方法名称: getPerson<br>
	 * 描述：XML ---> Object
	 * 作者: liqijing
	 * 修改日期：2015-4-6下午07:47:21
	 * @param reqXml
	 * @return
	 */
	public static Person getPerson(String reqXml){
		Body body = JaxbMapper.fromXml(reqXml,Body.class) ;
		return body.getPerson() ;
		
	}
	
	
	/**
	 * 方法名称: initPerson<br>
	 * 描述：初始化person对象
	 * 作者: liqijing
	 * 修改日期：2015-4-6下午07:38:12
	 * @return
	 */
	public static Person initPerson(){
		Person person = new Person("100000","马云","24","男","lijinginsistsmile@163.com");
		return person ;
	}
	
}

JaxbMapper生成&&解析： 

/*******************************************************************************
 * Copyright (c) 2005,2014 springside.github.io
 *
 * Licensed under the Apache License,Version 2.0 (the "License");
 *******************************************************************************/
package com.insist.objectxml.common;

import java.io.StringReader;
import java.io.StringWriter;
import java.util.Collection;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlAnyElement;
import javax.xml.namespace.QName;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.Validate;

import com.insist.objectxml.exception.Exceptions;


/**
 * 使用Jaxb2.0实现XML<->Java Object的Mapper.
 * 
 * 在创建时需要设定所有需要序列化的Root对象的Class.
 * 特别支持Root对象是Collection的情形.
 * 
 * @author calvin
 */
public class JaxbMapper {

	private static final Exceptions Exceptions = null;
	private static ConcurrentMap<Class,JAXBContext> jaxbContexts = new ConcurrentHashMap<Class,JAXBContext>();

	/**
	 * Java Object->Xml without encoding.
	 */
	public static String toXml(Object root) {
		Class clazz = Reflections.getUserClass(root);
		return toXml(root,clazz,null);
	}

	/**
	 * Java Object->Xml with encoding.
	 */
	public static String toXml(Object root,String encoding) {
		Class clazz = Reflections.getUserClass(root);
		return toXml(root,encoding);
	}

	/**
	 * Java Object->Xml with encoding.
	 */
	public static String toXml(Object root,Class clazz,String encoding) {
		try {
			StringWriter writer = new StringWriter();
			createMarshaller(clazz,encoding).marshal(root,writer);
			return writer.toString();
		} catch (JAXBException e) {
			throw Exceptions.unchecked(e);
		}
	}

	/**
	 * Java Collection->Xml without encoding,特别支持Root Element是Collection的情形.
	 */
	public static String toXml(Collection<?> root,String rootName,Class clazz) {
		return toXml(root,rootName,null);
	}

	/**
	 * Java Collection->Xml with encoding,String encoding) {
		try {
			CollectionWrapper wrapper = new CollectionWrapper();
			wrapper.collection = root;

			JAXBElement<CollectionWrapper> wrapperElement = new JAXBElement<CollectionWrapper>(new QName(rootName),CollectionWrapper.class,wrapper);

			StringWriter writer = new StringWriter();
			createMarshaller(clazz,encoding).marshal(wrapperElement,writer);

			return writer.toString();
		} catch (JAXBException e) {
			throw Exceptions.unchecked(e);
		}
	}

	/**
	 * Xml->Java Object.
	 */
	public static <T> T fromXml(String xml,Class<T> clazz) {
		try {
			StringReader reader = new StringReader(xml);
			return (T) createUnmarshaller(clazz).unmarshal(reader);
		} catch (JAXBException e) {
			throw Exceptions.unchecked(e);
		}
	}

	/**
	 * 创建Marshaller并设定encoding(可为null).
	 * 线程不安全，需要每次创建或pooling。
	 */
	public static Marshaller createMarshaller(Class clazz,String encoding) {
		try {
			JAXBContext jaxbContext = getJaxbContext(clazz);

			Marshaller marshaller = jaxbContext.createMarshaller();

			marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,Boolean.TRUE);

			if (StringUtils.isNotBlank(encoding)) {
				marshaller.setProperty(Marshaller.JAXB_ENCODING,encoding);
			}

			return marshaller;
		} catch (JAXBException e) {
			throw Exceptions.unchecked(e);
		}
	}

	/**
	 * 创建UnMarshaller.
	 * 线程不安全，需要每次创建或pooling。
	 */
	public static Unmarshaller createUnmarshaller(Class clazz) {
		try {
			JAXBContext jaxbContext = getJaxbContext(clazz);
			return jaxbContext.createUnmarshaller();
		} catch (JAXBException e) {
			throw Exceptions.unchecked(e);
		}
	}

	protected static JAXBContext getJaxbContext(Class clazz) {
		Validate.notNull(clazz,"'clazz' must not be null");
		JAXBContext jaxbContext = jaxbContexts.get(clazz);
		if (jaxbContext == null) {
			try {
				jaxbContext = JAXBContext.newInstance(clazz,CollectionWrapper.class);
				jaxbContexts.putIfAbsent(clazz,jaxbContext);
			} catch (JAXBException ex) {
				throw new RuntimeException("Could not instantiate JAXBContext for class [" + clazz + "]: " + ex.getMessage(),ex);
			}
		}
		return jaxbContext;
	}

	/**
	 * 封装Root Element 是 Collection的情况.
	 */
	public static class CollectionWrapper {

		@XmlAnyElement
		protected Collection<?> collection;
	}
}


Reflections 类： 

/*******************************************************************************
 * Copyright (c) 2005,Version 2.0 (the "License");
 *******************************************************************************/
package com.insist.objectxml.common;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.Validate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 反射工具类.
 * 
 * 提供调用getter/setter方法,访问私有变量,调用私有方法,获取泛型类型Class,被AOP过的真实类等工具函数.
 * 
 * @author calvin
 */
public class Reflections {
	private static final String SETTER_PREFIX = "set";

	private static final String GETTER_PREFIX = "get";

	private static final String CGLIB_CLASS_SEPARATOR = "$$";

	private static Logger logger = LoggerFactory.getLogger(Reflections.class);

	/**
	 * 调用Getter方法.
	 */
	public static Object invokeGetter(Object obj,String propertyName) {
		String getterMethodName = GETTER_PREFIX + StringUtils.capitalize(propertyName);
		return invokeMethod(obj,getterMethodName,new Class[] {},new Object[] {});
	}

	/**
	 * 调用Setter方法,仅匹配方法名。
	 */
	public static void invokeSetter(Object obj,String propertyName,Object value) {
		String setterMethodName = SETTER_PREFIX + StringUtils.capitalize(propertyName);
		invokeMethodByName(obj,setterMethodName,new Object[] { value });
	}

	/**
	 * 直接读取对象属性值,无视private/protected修饰符,不经过getter函数.
	 */
	public static Object getFieldValue(final Object obj,final String fieldName) {
		Field field = getAccessibleField(obj,fieldName);

		if (field == null) {
			throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + obj + "]");
		}

		Object result = null;
		try {
			result = field.get(obj);
		} catch (IllegalAccessException e) {
			logger.error("不可能抛出的异常{}",e.getMessage());
		}
		return result;
	}

	/**
	 * 直接设置对象属性值,不经过setter函数.
	 */
	public static void setFieldValue(final Object obj,final String fieldName,final Object value) {
		Field field = getAccessibleField(obj,fieldName);

		if (field == null) {
			throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + obj + "]");
		}

		try {
			field.set(obj,value);
		} catch (IllegalAccessException e) {
			logger.error("不可能抛出的异常:{}",e.getMessage());
		}
	}

	/**
	 * 直接调用对象方法,无视private/protected修饰符.
	 * 用于一次性调用的情况，否则应使用getAccessibleMethod()函数获得Method后反复调用.
	 * 同时匹配方法名+参数类型，
	 */
	public static Object invokeMethod(final Object obj,final String methodName,final Class<?>[] parameterTypes,final Object[] args) {
		Method method = getAccessibleMethod(obj,methodName,parameterTypes);
		if (method == null) {
			throw new IllegalArgumentException("Could not find method [" + methodName + "] on target [" + obj + "]");
		}

		try {
			return method.invoke(obj,args);
		} catch (Exception e) {
			throw convertReflectionExceptionToUnchecked(e);
		}
	}

	/**
	 * 直接调用对象方法,无视private/protected修饰符，
	 * 用于一次性调用的情况，否则应使用getAccessibleMethodByName()函数获得Method后反复调用.
	 * 只匹配函数名，如果有多个同名函数调用第一个。
	 */
	public static Object invokeMethodByName(final Object obj,final Object[] args) {
		Method method = getAccessibleMethodByName(obj,methodName);
		if (method == null) {
			throw new IllegalArgumentException("Could not find method [" + methodName + "] on target [" + obj + "]");
		}

		try {
			return method.invoke(obj,args);
		} catch (Exception e) {
			throw convertReflectionExceptionToUnchecked(e);
		}
	}

	/**
	 * 循环向上转型,获取对象的DeclaredField,并强制设置为可访问.
	 * 
	 * 如向上转型到Object仍无法找到,返回null.
	 */
	public static Field getAccessibleField(final Object obj,final String fieldName) {
		Validate.notNull(obj,"object can't be null");
		Validate.notBlank(fieldName,"fieldName can't be blank");
		for (Class<?> superClass = obj.getClass(); superClass != Object.class; superClass = superClass.getSuperclass()) {
			try {
				Field field = superClass.getDeclaredField(fieldName);
				makeAccessible(field);
				return field;
			} catch (NoSuchFieldException e) {// NOSONAR
				// Field不在当前类定义,继续向上转型
			}
		}
		return null;
	}

	/**
	 * 循环向上转型,获取对象的DeclaredMethod,并强制设置为可访问.
	 * 如向上转型到Object仍无法找到,返回null.
	 * 匹配函数名+参数类型。
	 * 
	 * 用于方法需要被多次调用的情况. 先使用本函数先取得Method,然后调用Method.invoke(Object obj,Object... args)
	 */
	public static Method getAccessibleMethod(final Object obj,final Class<?>... parameterTypes) {
		Validate.notNull(obj,"object can't be null");
		Validate.notBlank(methodName,"methodName can't be blank");

		for (Class<?> searchType = obj.getClass(); searchType != Object.class; searchType = searchType.getSuperclass()) {
			try {
				Method method = searchType.getDeclaredMethod(methodName,parameterTypes);
				makeAccessible(method);
				return method;
			} catch (NoSuchMethodException e) {
				// Method不在当前类定义,返回null.
	 * 只匹配函数名。
	 * 
	 * 用于方法需要被多次调用的情况. 先使用本函数先取得Method,Object... args)
	 */
	public static Method getAccessibleMethodByName(final Object obj,final String methodName) {
		Validate.notNull(obj,"methodName can't be blank");

		for (Class<?> searchType = obj.getClass(); searchType != Object.class; searchType = searchType.getSuperclass()) {
			Method[] methods = searchType.getDeclaredMethods();
			for (Method method : methods) {
				if (method.getName().equals(methodName)) {
					makeAccessible(method);
					return method;
				}
			}
		}
		return null;
	}

	/**
	 * 改变private/protected的方法为public，尽量不调用实际改动的语句，避免JDK的SecurityManager抱怨。
	 */
	public static void makeAccessible(Method method) {
		if ((!Modifier.isPublic(method.getModifiers()) || !Modifier.isPublic(method.getDeclaringClass().getModifiers())) && !method.isAccessible()) {
			method.setAccessible(true);
		}
	}

	/**
	 * 改变private/protected的成员变量为public，尽量不调用实际改动的语句，避免JDK的SecurityManager抱怨。
	 */
	public static void makeAccessible(Field field) {
		if ((!Modifier.isPublic(field.getModifiers()) || !Modifier.isPublic(field.getDeclaringClass().getModifiers()) || Modifier.isFinal(field.getModifiers())) && !field.isAccessible()) {
			field.setAccessible(true);
		}
	}

	/**
	 * 通过反射,获得Class定义中声明的泛型参数的类型,注意泛型必须定义在父类处
	 * 如无法找到,返回Object.class.
	 * eg.
	 * public UserDao extends HibernateDao<User>
	 * 
	 * @param clazz The class to introspect
	 * @return the first generic declaration,or Object.class if cannot be determined
	 */
	public static <T> Class<T> getClassGenricType(final Class clazz) {
		return getClassGenricType(clazz,0);
	}

	/**
	 * 通过反射,获得Class定义中声明的父类的泛型参数的类型.
	 * 如无法找到,返回Object.class.
	 * 
	 * 如public UserDao extends HibernateDao<User,Long>
	 * 
	 * @param clazz clazz The class to introspect
	 * @param index the Index of the generic ddeclaration,start from 0.
	 * @return the index generic declaration,or Object.class if cannot be determined
	 */
	public static Class getClassGenricType(final Class clazz,final int index) {

		Type genType = clazz.getGenericSuperclass();

		if (!(genType instanceof ParameterizedType)) {
			logger.warn(clazz.getSimpleName() + "'s superclass not ParameterizedType");
			return Object.class;
		}

		Type[] params = ((ParameterizedType) genType).getActualTypeArguments();

		if ((index >= params.length) || (index < 0)) {
			logger.warn("Index: " + index + ",Size of " + clazz.getSimpleName() + "'s Parameterized Type: " + params.length);
			return Object.class;
		}
		if (!(params[index] instanceof Class)) {
			logger.warn(clazz.getSimpleName() + " not set the actual class on superclass generic parameter");
			return Object.class;
		}

		return (Class) params[index];
	}

	public static Class<?> getUserClass(Object instance) {
		Validate.notNull(instance,"Instance must not be null");
		Class clazz = instance.getClass();
		if ((clazz != null) && clazz.getName().contains(CGLIB_CLASS_SEPARATOR)) {
			Class<?> superClass = clazz.getSuperclass();
			if ((superClass != null) && !Object.class.equals(superClass)) {
				return superClass;
			}
		}
		return clazz;

	}

	/**
	 * 将反射时的checked exception转换为unchecked exception.
	 */
	public static RuntimeException convertReflectionExceptionToUnchecked(Exception e) {
		if ((e instanceof IllegalAccessException) || (e instanceof IllegalArgumentException) || (e instanceof NoSuchMethodException)) {
			return new IllegalArgumentException(e);
		} else if (e instanceof InvocationTargetException) {
			return new RuntimeException(((InvocationTargetException) e).getTargetException());
		} else if (e instanceof RuntimeException) {
			return (RuntimeException) e;
		}
		return new RuntimeException("Unexpected Checked Exception.",e);
	}
}


Person类 

package com.insist.objectxml.person;

import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlType;
 
/**
 * 描述：object转xml实体类<br>
 * 作者：liqijing <br>
 * 修改日期：2015-4-6下午07:29:49 <br>
 * E-mail: lijinginsistsmile@163.com <br>
 */
@XmlType(name="Person",propOrder={"perId","perName","perAge","perSex","email"}) 
public class Person {
	
	private String perId;
	private String perName ;
	private String perAge ;
	private String perSex ;
	private String email ;
	
	@XmlElement(name = "PerId")
	public String getPerId() {
		return perId;
	}
	public void setPerId(String perId) {
		this.perId = perId;
	}
	
	@XmlElement(name = "PerName")
	public String getPerName() {
		return perName;
	}
	public void setPerName(String perName) {
		this.perName = perName;
	}
	
	@XmlElement(name = "PerAge")
	public String getPerAge() {
		return perAge;
	}
	public void setPerAge(String perAge) {
		this.perAge = perAge;
	}
	
	@XmlElement(name = "PerSex")
	public String getPerSex() {
		return perSex;
	}
	public void setPerSex(String perSex) {
		this.perSex = perSex;
	}
	
	@XmlElement(name = "PerEmail")
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	
	public Person() {
		// TODO Auto-generated constructor stub
	}
	
	public Person(String perId,String perName,String perAge,String perSex,String email) {
		this.perId = perId;
		this.perName = perName;
		this.perAge = perAge;
		this.perSex = perSex;
		this.email = email ;
	}
	
	
}

Body类： 

package com.insist.objectxml.person;

import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

/**
 * 描述：body标头<br>
 * 作者：liqijing <br>
 * 修改日期：2015-4-6下午07:34:49 <br>
 * E-mail: lijinginsistsmile@163.com <br>
 */

@XmlRootElement(name = "Body")
public class Body {
	
	
	private Person person ;

	@XmlElement(name = "Person")
	public Person getPerson() {
		return person;
	}

	public void setPerson(Person person) {
		this.person = person;
	}
	
	
}


需要jar包：

commons-lang3-3.1.jar

slf4j-api-1.7.5-sources.jar

slf4j-api-1.7.5.jar



很高兴与你们分享：
希望对需要实现 对象转XML或XML转对象的朋友们有帮助！
谢谢！
原文链接：https://www.f2er.com/xml/296964.html

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