Springmvc完成ajax功能。(jquery. $)

1.加入jackson的jar包. springmvc。

2.在响应的方法上加上@ResponseBody :把java对象转化为json对象。

3.方法的返回值可以是对象集合字符串。

package com.zhiyou100.wyf.controller;

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

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.zhiyou100.wyf.bean.Users;

@Controller
@RequestMapping("/ajax/")
public class AjaxController {
    
    
    @RequestMapping(value="Ajax1",produces="text/html;charset=UTF-8")
    @ResponseBody//把java对象转化json对象，需要使用jackson的jar包
    public String ajax(String name) {//对象
        System.out.println(name);
        return "张三";
    }
    
    @RequestMapping("Ajax2")
    @ResponseBody
    public List<Users> ajax1(String name) {
        System.out.println(name);
        List<Users> users = new ArrayList<Users>();
        Users user1 = new Users("张三1",11,"男",11,"111");
        Users user2 = new Users("张三2",11,"男",11,"111");
        Users user3 = new Users("张三3",11,"男",11,"111");
        Users user4 = new Users("张三4",11,"男",11,"111");
        Users user5 = new Users("张三5",11,"男",11,"111");
        Users user6 = new Users("张三6",11,"男",11,"111");
        users.add(user1);
        users.add(user2);
        users.add(user3);
        users.add(user4);
        users.add(user5);
        users.add(user6);
        return users;
    }
    
    
}

jsp代码如下：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<link rel="stylesheet" href="/springMvc-03/css/index.css">
<script type="text/javascript" src="/springMvc-03/js/jquery-3.2.1.min.js"></script>
 <script type="text/javascript">
    $.post("ajax/Ajax1",{"name":"张三1"},function(data){
        alert(data);
    });
</script>


<script type="text/javascript">
    $.post("ajax/Ajax2",{"name":"张三2"},function(result){
        $.each(result,function(i,n){
            alert(n.uname)
        })
    });
</script>
</head>
<body>
<img  src="/springMvc-03/img/32551428_1231_20190617-131828.png">
</body>
</html>

如果ajax返回的为字符串，那么就会出现乱码。

1.编写注解@RequestMapping(value="ajax",produces = {"text/html;charset=utf-8"})

@RequestMapping(value="ajax",produces = {"text/html;charset=utf-8"})

2.修改配置文件，在驱动中加入代码如下

参考步骤（通过org.springframework.web.servlet.view.InternalResourceViewResolver的有参构造函数进行设置编码）：

Springmvc完成ajax功能。(jquery. $)

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