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：
public class User {
private Integer id;
private String name;
private String pwd;
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", pwd='" + pwd + '\'' +
'}';
}
// .......后面还有getter、setter方法，省略了
}
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：
<head>
<title>submitUserList_3</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<script language="JavaScript" src="/js/jquery.min.js" ></script>
<script language="JavaScript" src="/js/jquery.json.min.js" ></script>
<script type="text/javascript" language="JavaScript">
function submitUserList_3() {alert("ok");
var customerArray = new Array();
customerArray.push({id: "1", name: "李四", pwd: "123"});
customerArray.push({id: "2", name: "张三", pwd: "332"});
$.ajax({
url: "/user/submitUserList_3",
type: "POST",
contentType : 'application/json;charset=utf-8', //设置请求头信息
dataType:"json",
//data: JSON.stringify(customerArray), //将Json对象序列化成Json字符串，JSON.stringify()原生态方法
data: $.toJSON(customerArray), //将Json对象序列化成Json字符串，toJSON()需要引用jquery.json.min.js
success: function(data){
alert(data);
},
error: function(res){
alert(res.responseText);
}
});
}
</script>
</head> <body>
<h1>submitUserList_3</h1>
<input id="submit" type="button" value="Submit" onclick="submitUserList_3();">
</body>
Java代码：
@RequestMapping(value = "/submitUserList_3", method ={RequestMethod.POST})
@ResponseBody
public String submitUserList_3(@RequestBody List<User> users)
throws Exception{
String result = "";
if(users == null || users.size() <= 0){ return "No any ID.中文"; }
result = this.showUserList(users);
return result;
}
第2种方法：将表单对象序列化成Json字符串提交，以List接收
HTML代码：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>submitUserList_4</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<script language="JavaScript" src="/js/jquery.min.js" ></script>
<script type="text/javascript" language="JavaScript">
//将表单序列化成json格式的数据(但不适用于含有控件的表单，例如复选框、多选的select)
(function($){
$.fn.serializeJson = function(){
var jsonData1 = {};
var serializeArray = this.serializeArray();
// 先转换成{"id": ["12","14"], "name": ["aaa","bbb"], "pwd":["pwd1","pwd2"]}这种形式
$(serializeArray).each(function () {
if (jsonData1[this.name]) {
if ($.isArray(jsonData1[this.name])) {
jsonData1[this.name].push(this.value);
} else {
jsonData1[this.name] = [jsonData1[this.name], this.value];
}
} else {
jsonData1[this.name] = this.value;
}
});
// 再转成[{"id": "12", "name": "aaa", "pwd":"pwd1"},{"id": "14", "name": "bb", "pwd":"pwd2"}]的形式
var vCount = 0;
// 计算json内部的数组最大长度
for(var item in jsonData1){
var tmp = $.isArray(jsonData1[item]) ? jsonData1[item].length : 1;
vCount = (tmp > vCount) ? tmp : vCount;
} if(vCount > 1) {
var jsonData2 = new Array();
for(var i = 0; i < vCount; i++){
var jsonObj = {};
for(var item in jsonData1) {
jsonObj[item] = jsonData1[item][i];
}
jsonData2.push(jsonObj);
}
return JSON.stringify(jsonData2);
}else{
return "[" + JSON.stringify(jsonData1) + "]";
}
};
})(jQuery); function submitUserList_4() {alert("ok");
var jsonStr = $("#form1").serializeJson();
//console.log("jsonStr:\r\n" + jsonStr);
//alert(jsonStr);
$.ajax({
url: "/user/submitUserList_4",
type: "POST",
contentType : 'application/json;charset=utf-8', //设置请求头信息
dataType:"json",
data: jsonStr,
success: function(data){
alert(data);
},
error: function(res){
alert(res.responseText);
}
});
}
</script>
</head> <body>
<h1>submitUserList_4</h1>
<form id="form1">
ID:<input type="text" name="id"><br/>
Username:<input type="text" name="name"><br/>
Password:<input type="text" name="pwd"><br/><br/> ID:<input type="text" name="id"><br/>
Username:<input type="text" name="name"><br/>
Password:<input type="text" name="pwd"><br/><br/>
<input type="button" value="submit" onclick="submitUserList_4();">
</form>
</body>
</html>
Java代码：
@RequestMapping(value = "/submitUserList_4", method ={RequestMethod.POST})
@ResponseBody
public String submitUserList_4(@RequestBody List<User> users)
throws Exception{
String result = "";
if(users == null || users.size() <= 0){ return "No any ID.中文"; }
result = this.showUserList(users);
return result;
}
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