本文实例讲述了JSP+jQuery使用Ajax方式调用JSON的实现方法，在这里分享给大家以供大家参考，具体的实现以及代码如下所示：
前台：
<script type="text/javascript" src="jquery-1.5.1.min.js"></script>
<script type="text/javascript">
//test
function test(uid)
{
if(confirm("确定该用户操作"+uid+"吗？"))
{
var date = new Date();
var param = {uid:uid};
jQuery.get("test.jsp?para=" + date, param,
function(data){
if(data != null)
{
var result = data.result;
//alert("data==="+data);
if(result == 1)
{
alert("操作失败");
}
if(result == 0)
{
alert("操作失败。");
//document.location.href = document.location;
//window.location.reload();
}
}
});
}
}
</script>
<a href="javascript:void(0);" onclick="test(111111111111111111);">submit</a>
后台：
test.jsp：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%
response.setContentType("application/x-json;charset=UTF-8");
String uid=request.getParameter("uid");
int ret=0;
String result = "{\"result\":" + ret + "}";
out.print(result);
%>注意：返回json格式
如{"result":0}
需要设置 ：
代码如下:
response.setContentType("application/x-json;charset=UTF-8");jsp+jquery+ajax+json
Person、Address 2个类描述一个人，用ajax把数据取回显示在页面上，在DemoServlet里组装数据，项目用到的文件
json-lib-2.1-jkd15.jar
commons-lang-2.1.jar
commons-logging.jar
commons-collections-3.2.jar
commons-beanutils.jar
jquery.js
json.js
下面是详细代码：
Person:
public class Person implements java.io.Serializable{
private String name;
private String sex;
private Integer age;
private Address address;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
}
Address:
public class Address implements java.io.Serializable{
private String province;
private String city;
private String country;
public Address() {
}
public Address(String province, String city, String country){
this.province =province;
this.city = city;
this.country = country;
}
public String getProvince() {
return province;
}
public void setProvince(String province) {
this.province =province;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
}
DemoServlet:
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import org.wncnke.json.pojo.Address;
import org.wncnke.json.pojo.Person;
public class DemoServlet extends HttpServlet{
@Override
protected void doGet(HttpServletRequest request,HttpServletResponse response)
throwsServletException, IOException {
doPost(request, response);
}
@Override
protected void doPost(HttpServletRequest request,HttpServletResponse response)
throwsServletException, IOException {
response.setContentType("text/xml;charset=utf-8");
response.setHeader("Cache-Control","no-cache");
try{
Personperson1 = new Person();
person1.setName("小王");
person1.setSex("女");
person1.setAge(23);
person1.setAddress(newAddress("辽宁省","大连市","高新园区"));
List<Person> list = new ArrayList<Person>();
list.add(person1);
try{
//取集合
JSONArray jsonArray = JSONArray.fromObject(list);
JSONObject jsonObject = new JSONObject();
jsonObject.put("person", jsonArray);
response.getWriter().write(jsonObject.toString());
} catch(IOException e) {
e.printStackTrace();
}
}catch(Exception e){
e.printStackTrace();
}
}
}
web.xml:
<?xml version="1.0"encoding="UTF-8"?>
<web-app xmlns="http://caucho.com/ns/resin" xmlns:resin="http://caucho.com/ns/resin/core">
<display-name>json</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>DemoServlet</servlet-name>
<servlet-class>org.wncnke.json.servlet.DemoServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DemoServlet</servlet-name>
<url-pattern>/demoServlet</url-pattern>
</servlet-mapping>
</web-app>
index.jsp:
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<%@ page language="java" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath =request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<mce:script language="javascript" src="script/jquery.js"mce_src="script/jquery.js"></mce:script>
<mce:script language="javascript" src="script/json.js"mce_src="script/json.js"></mce:script>
<mce:script language="javascript"><!--
function addPerson(){
$.getJSON("demoServlet",null,function call(data){
var list = data.person;
$.each(list, function(i, p){
var row =$("#tr").clone();
row.find("#name").text(p.name);
row.find("#age").text(p.age);
row.find("#sex").text(p.sex);
row.find("#address").text(p.address.province + p.address.city +p.address.country);
row.appendTo("#tbody");
});
});
}
// --></mce:script>
</head>
<body>
<input type="button" value="JsonView"onClick="addPerson();">
<div id="dateMessage">
<table id="planTable"border="1">
<tr>
<td>Name</td>
<td>Sex</td>
<td>Age</td>
<td>Address</td>
</tr>
<tbody id="tbody">
<trid="tr">
<td id="name"></td>
<td id="sex"></td>
<td id="age"></td>
<td id="address"></td>
</tr>
</tbody>
</table>
</div>
</body>
</html>