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下面是编程之家 jb51.cc 通过网络收集整理的代码片段。

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//ajax类库
function ajax(json){
				
				var type=json.type||'GET';
				var url=json.url;
				var success=json.success;
				var error=json.error||false;
				var data=json.data||"";
		
				
				//1、创建AJAX对象
				var OAjax;
				try{
					//Firefox,Opera 8.0+,Safari
					OAjax=new XMLHttpRequest();
				}catch(e){
					//Internet Explorer
					try{
						OAjax=new ActiveXObject("Msxml2.XMLHTTP");
					}catch(e){
						try{
							OAjax=new ActiveXObject("Microsoft.XMLHTTP");
						}catch(e){
							alert("你的浏览器不支持AJAX!");
							return false;
						}
					}
				}
				
				
				
				//2、连接服务器
				OAjax.open(type,url,true);
				
				//3、发送请求
				OAjax.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=UTF-8");
				OAjax.send(data);
				
				//4、接受数据
				OAjax.onreadystatechange=function(){
					if(OAjax.readyState==4){
						if(OAjax.status==200){
							var data=OAjax.responseText;
							success(data);
						}else{
							if(error){
								error();
							}
						}
		
					}
				}
				
			}



//显示页面
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    
    
    <title>My JSP 'page.jsp' starting page</title>
    
	<Meta http-equiv="pragma" content="no-cache">
	<Meta http-equiv="cache-control" content="no-cache">
	<Meta http-equiv="expires" content="0">    
	<Meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<Meta http-equiv="description" content="This is my page">
	<style type="text/css">
		body{margin:0;padding:0;}
		ul,li{margin:0;padding:0;list-style:none;}
		#main{width:940px;height:400px;border:1px solid #d8d8d8;Box-shadow:0px 0px 5px;margin:0 auto;}
		#main ul{width:900px;height:300px;padding:10px 20px;}
		#main ul li{width:100%;height:40px;line-height:40px;border-bottom:1px solid #d8d8d8;margin-bottom:3px;}
		#page{width:100%;height:40px;line-height:60px;text-align:center;}
		#page a{width:130px;height:40px;line-height:40px;display:inline-block;text-align:center;border:1px solid #ddd;}
		#page a:link,#page a:visited{text-decoration:none;}
	</style>
	<script type="text/javascript" src="./js/ajax1.js"></script>
	<script type="text/javascript">
		window.onload=function(){
		
			var liNodes=document.getElementById('main').getElementsByTagName('li');
			var pageNode=document.getElementById('page');
			var aNodes=pageNode.getElementsByTagName('a');
			for(var i=0;i<aNodes.length;i++){
				aNodes[i].onclick=function(){
					var url=this.href;
					ajax({
						type:'GET',url:url,success:function(data){
						var data=eval("("+data+")");
							for(var i=0;i<data.length;i++){
								liNodes[i].innerHTML=data[i];
							}
						},error:function(){
							alert("request error");
						}
					});
					return false;
				}
			
			}
			
		}
	</script>
  </head>
  
  <body>
   	<div id="main">
   		<ul>
   			<li>afdsafdsafdsafdsafdsafdsafdsafdsa</li>
   			<li>afdsafdsafdsafdsafdsafdsafdsafdsa</li>
   			<li>afdsafdsafdsafdsafdsafdsafdsafdsa</li>
   			<li>afdsafdsafdsafdsafdsafdsafdsafdsa</li>
   			<li>afdsafdsafdsafdsafdsafdsafdsafdsa</li>
   			<li>afdsafdsafdsafdsafdsafdsafdsafdsa</li>
   		
   			
   		</ul>
   		<div id="page">
   			<a href="${pageContext.request.contextPath}/doPageServlet?page=1">1</a>
   			<a href="${pageContext.request.contextPath}/doPageServlet?page=2">2</a>
   			<a href="${pageContext.request.contextPath}/doPageServlet?page=3">3</a>
   		</div>
   	</div>
  </body>
</html>



//ajax数据处理程序
package dcr.service.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONArray;

public class doPageServlet extends HttpServlet {

	
	public void doGet(HttpServletRequest request,HttpServletResponse response)
			throws ServletException,IOException {
		request.setCharacterEncoding("utf-8");
		response.setContentType("text/html");
		int num=Integer.parseInt(request.getParameter("page"));
		PrintWriter writer=response.getWriter();
		
		int pagesize=6;
		int start=(num-1)*pagesize;
		int end=start+pagesize;
		System.out.println(start+":"+end);
		String[] data={"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb","bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",};
		ArrayList dataList=new ArrayList<String>();
		for(int i=start;i<end;i++){
			dataList.add(data[i]);
		}
		System.out.println(dataList.toString());
		JSONArray jsonArray=JSONArray.fromObject(dataList);
		System.out.println(jsonArray.toString());
		writer.write(jsonArray.toString());
		writer.flush();
		writer.close();
		
	}

	
	public void doPost(HttpServletRequest request,IOException {
			doGet(request,response);
	}

}



用到的jar

json-lib-2.4-jdk15.jar  commons-beanutils.jar   commons-collections.jar   commons-lang.jar   commons-logging.jar    ezmorph-1.0.6.jar

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原文链接:https://www.f2er.com/html/457408.html

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