SpringMVC與Ajax交互

1 springmvc和ajax的交互

1.1  請求字符串響應json

客戶端發送的數據:key=value&key1=value1

響應回來:json

1.1.1json的支持jar包

 

1.1.2創建Handler處理器

 1 package org.guangsoft.controller;  2 
 3 import java.util.ArrayList;  4 import java.util.List;  5 
 6 import org.guangsoft.pojo.User;  7 import org.springframework.stereotype.Controller;  8 import org.springframework.web.bind.annotation.RequestBody;  9 import org.springframework.web.bind.annotation.RequestMapping; 10 import org.springframework.web.bind.annotation.ResponseBody; 11 
12 @Controller 13 public class UserHandler 14 { 15     //responseBody將返回值轉化爲json格式響應到客戶端 16     //requestBody將請求數據轉化爲json對象
17     @RequestMapping("/checkUsername") 18     public @ResponseBody List<User> CheckUsername(User user) 19  { 20  System.out.println(user.getUsername()); 21         List<User> userList = new ArrayList<User>(); 22         User user0 = new User(); 23         user0.setUsername("java"); 24         User user1 = new User(); 25         user1.setUsername("javase"); 26         User user2 = new User(); 27         user2.setUsername("javaee"); 28         //對象加入集合
29  userList.add(user0); 30  userList.add(user1); 31  userList.add(user2); 32         return userList; 33  } 34     
35     @RequestMapping("/checkUsername2") 36     public @ResponseBody List<User> CheckUsername2(@RequestBody User user) 37  { 38  System.out.println(user.getUsername()); 39         List<User> userList = new ArrayList<User>(); 40         User user0 = new User(); 41         user0.setUsername("java"); 42         User user1 = new User(); 43         user1.setUsername("javase"); 44         User user2 = new User(); 45         user2.setUsername("javaee"); 46         //對象加入集合
47  userList.add(user0); 48  userList.add(user1); 49  userList.add(user2); 50         return userList; 51  } 52 } 

1.1.3完成ajax發送請求

 

備註：springmvc ajax，響應json406錯誤，使用json相關jar包2.4以上版本。

 1 function sendAjax()  2 {  3     var username = $("#username").val();  4     var age = $("#age").val();  5     var div = $("#showDiv");  6  $.ajax(  7  {  8         url:"checkUsername.action",  9         data:{"username":username,"age":age}, 10         type:"post", 11         dataType:"json", 12         success:function(data) 13  { 14             var jsons = data; 15             div.html(""); 16             for(var i = 0; i < jsons.length; i++) 17  { 18                 div.append("<div>"+jsons[i].username+"</div>"); 19  } 20  } 21  }); 22 } 

1.2請求json響應json

客戶端發送的數據：{key：value,key1:value1}

 

響應回來:json

1.2.1 創建服務器端Handler

見上 

1.2.2客戶端發生ajax請求

 1 function sendAjax2()  2 {  3     var username = $("#username").val();  4     var age = $("#age").val();  5     var div = $("#showDiv");  6  $.ajax(  7  {  8         url:"checkUsername2.action",  9         type:"post", 10         data:'{"username":"username","age":"4"}', 11         contentType:"application/json;charset=utf-8", 12         dataType:"json", 13         success:function(data) 14  { 15             var jsons = data; 16             div.html(""); 17             for(var i = 0; i < jsons.length; i++) 18  { 19                 div.append("<div>"+jsons[i].username+"</div>"); 20  } 21  } 22  }); 23 }

2url跳轉

Model封裝數據的範圍request範圍，只有請求轉發才能獲取

若是是重定向變爲url傳參。

Return 「forward:url」：請求轉發

Return 「redirect:url」重定向