SpringMVC接收多个对象

问题背景:

  要在一个表单里同时一次性提交多名乘客的个人信息到SpringMVC,前端HTML和SpringMVC Controller里该如何处理?

  • 第1种方法:将Json对象序列化成Json字符串提交,以List接收;
  • 第2种方法:将表单对象序列化成Json字符串提交,以List接收;第2种方法其实是第1种方法的升级,就是将表单转成Json对象,再转成Json字符串提交。

 

以上2种方法都共用同一个User实体类,代码如下:

 1 public class User {
 2     private Integer id;
 3     private String name;
 4     private String pwd;
 5 
 6     @Override
 7     public String toString() {
 8         return "User{" +
 9                 "id=" + id +
10                 ", name='" + name + '\'' +
11                 ", pwd='" + pwd + '\'' +
12                 '}';
13     }
14     // .......后面还有getter、setter方法,省略了
15  }

 

 

第1种方法:将Json对象序列化成Json字符串提交,以List接收 

  HTML代码:

 1 <head>
 2     <title>submitUserList_3</title>
 3     <meta http-equiv="content-type" content="text/html; charset=utf-8">
 4     <script language="JavaScript" src="/js/jquery.min.js" ></script>
 5     <script language="JavaScript" src="/js/jquery.json.min.js" ></script>
 6     <script type="text/javascript" language="JavaScript">
 7         function submitUserList_3() {alert("ok");
 8             var customerArray = new Array();
 9             customerArray.push({id: "1", name: "李四", pwd: "123"});
10             customerArray.push({id: "2", name: "张三", pwd: "332"});
11             $.ajax({
12                 url: "/user/submitUserList_3",
13                 type: "POST",
14                 contentType : 'application/json;charset=utf-8', //设置请求头信息
15                 dataType:"json",
16                 //data: JSON.stringify(customerArray),    //将Json对象序列化成Json字符串,JSON.stringify()原生态方法
17                 data: $.toJSON(customerArray),            //将Json对象序列化成Json字符串,toJSON()需要引用jquery.json.min.js
18                 success: function(data){
19                     alert(data);
20                 },
21                 error: function(res){
22                     alert(res.responseText);
23                 }
24             });
25         }
26     </script>
27 </head>
28 
29 <body>
30     <h1>submitUserList_3</h1>
31     <input id="submit" type="button" value="Submit" onclick="submitUserList_3();">
32 </body>

 

  Java代码:

1     @RequestMapping(value = "/submitUserList_3", method ={RequestMethod.POST})
2     @ResponseBody
3     public String submitUserList_3(@RequestBody List<User> users)
4             throws Exception{
5         String result = "";
6         if(users == null || users.size() <= 0){ return "No any ID.中文"; }
7         result = this.showUserList(users);
8         return result;
9     }

 

第2种方法:将表单对象序列化成Json字符串提交,以List接收 

  HTML代码:

 1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 2         "http://www.w3.org/TR/html4/loose.dtd">
 3 <html>
 4 <head>
 5     <title>submitUserList_4</title>
 6     <meta http-equiv="content-type" content="text/html; charset=utf-8">
 7     <script language="JavaScript" src="/js/jquery.min.js" ></script>
 8     <script type="text/javascript" language="JavaScript">
 9         //将表单序列化成json格式的数据(但不适用于含有控件的表单,例如复选框、多选的select)
10         (function($){
11             $.fn.serializeJson = function(){
12                 var jsonData1 = {};
13                 var serializeArray = this.serializeArray();
14                 // 先转换成{"id": ["12","14"], "name": ["aaa","bbb"], "pwd":["pwd1","pwd2"]}这种形式
15                 $(serializeArray).each(function () {
16                     if (jsonData1[this.name]) {
17                         if ($.isArray(jsonData1[this.name])) {
18                             jsonData1[this.name].push(this.value);
19                         } else {
20                             jsonData1[this.name] = [jsonData1[this.name], this.value];
21                         }
22                     } else {
23                         jsonData1[this.name] = this.value;
24                     }
25                 });
26                 // 再转成[{"id": "12", "name": "aaa", "pwd":"pwd1"},{"id": "14", "name": "bb", "pwd":"pwd2"}]的形式
27                 var vCount = 0;
28                 // 计算json内部的数组最大长度
29                 for(var item in jsonData1){
30                     var tmp = $.isArray(jsonData1[item]) ? jsonData1[item].length : 1;
31                     vCount = (tmp > vCount) ? tmp : vCount;
32                 }
33 
34                 if(vCount > 1) {
35                     var jsonData2 = new Array();
36                     for(var i = 0; i < vCount; i++){
37                         var jsonObj = {};
38                         for(var item in jsonData1) {
39                             jsonObj[item] = jsonData1[item][i];
40                         }
41                         jsonData2.push(jsonObj);
42                     }
43                     return JSON.stringify(jsonData2);
44                 }else{
45                     return "[" + JSON.stringify(jsonData1) + "]";
46                 }
47             };
48         })(jQuery);
49 
50         function submitUserList_4() {alert("ok");
51             var jsonStr = $("#form1").serializeJson();
52             //console.log("jsonStr:\r\n" + jsonStr);
53             //alert(jsonStr);
54             $.ajax({
55                 url: "/user/submitUserList_4",
56                 type: "POST",
57                 contentType : 'application/json;charset=utf-8', //设置请求头信息
58                 dataType:"json",
59                 data: jsonStr,
60                 success: function(data){
61                     alert(data);
62                 },
63                 error: function(res){
64                     alert(res.responseText);
65                 }
66             });
67         }
68     </script>
69 </head>
70 
71 <body>
72     <h1>submitUserList_4</h1>
73     <form id="form1">
74         ID:<input type="text" name="id"><br/>
75         Username:<input type="text" name="name"><br/>
76         Password:<input type="text" name="pwd"><br/><br/>
77 
78         ID:<input type="text" name="id"><br/>
79         Username:<input type="text" name="name"><br/>
80         Password:<input type="text" name="pwd"><br/><br/>
81         <input type="button" value="submit" onclick="submitUserList_4();">
82     </form>
83 </body>
84 </html>

 

  Java代码:

1     @RequestMapping(value = "/submitUserList_4", method ={RequestMethod.POST})
2     @ResponseBody
3     public String submitUserList_4(@RequestBody List<User> users)
4             throws Exception{
5         String result = "";
6         if(users == null || users.size() <= 0){ return "No any ID.中文"; }
7         result = this.showUserList(users);
8         return result;
9     }

 

以上方法参考自以下URL: 

http://www.cnblogs.com/wsw0515/p/3582627.html
http://www.oschina.net/question/917732_106601
http://jxd-zxf.iteye.com/blog/2072300
http://www.tashan10.com/jquery-jiang-biao-dan-xu-lie-hua-wei-jsondui-xiang

 

posted @ 2016-11-09 10:52  tancp  阅读(3562)  评论(0编辑  收藏  举报