SpringMVC接收多个对象的4种方法
发布时间：2021-02-20 10:48:47 所属栏目：Java 来源：互联网
导读：问题背景：我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SpringMVCController里该如何处理？
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问题背景：
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：表单提交，以字段数组接收 HTML代码如下：
<form action="/user/submitUserList_1" method="post">
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="submit" value="submit">
</form>
Java代码如下：
@RequestMapping(value = "/submitUserList_1",method ={RequestMethod.POST})
@ResponseBody
public String submitUserList_1(HttpServletResponse response,Integer[] id,String[] name,String[] pwd)
throws Exception{
String result = "";
if(id == null || id.length <= 0){ return "No any ID.中文"; }
List<User> userList = new ArrayList<User>();
for (int i = 0; i < id.length; i++ ) {
User user = new User();
user.setId(id[i]);
user.setName(name[i]);
user.setPwd(pwd[i]);
userList.add(user);
}
result = this.showUserList(userList);
return result;
}
第2种方法：表单提交，以BeanListModel接收 HTML代码如下：
<form action="/user/submitUserList_2" method="post">
ID:<input type="text" name="users[0].id"><br/>
Username:<input type="text" name="users[0].name"><br/>
Password:<input type="text" name="users[0].pwd"><br/><br/>
ID:<input type="text" name="users[2].id"><br/>
Username:<input type="text" name="users[2].name"><br/>
Password:<input type="text" name="users[2].pwd"><br/><br/>
<input type="submit" value="Submit">
</form>
Java代码：
public class UserModel {
private List<User> users;
public List<User> getUsers() {
return users;
}
public void setUsers(List<User> users) {
this.users = users;
}
public UserModel(List<User> users) {
super();
this.users = users;
}
public UserModel() {
super();
}
}
SpringMVC Controller方法：
@RequestMapping(value = "/submitUserList_2",method ={RequestMethod.POST})
@ResponseBody
public String submitUserList_2(UserModel users)
throws Exception{
String result = "";
List<User> userList = users.getUsers();
if(userList == null || userList.size() <= 0){ return "No any ID.中文"; }
result = this.showUserList(userList);
return result;
}
第3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: $.toJSON(customerArray),//将Json对象序列化成Json字符串，toJSON()需要引用jquery.json.min.js
success: function(data){
alert(data);
},error: function(res){
alert(res.responseText);
}
});
}
</script>
</head>
<body>
<h1>submitUserList_3</h1>
<input id="submit" type="button" value="Submit" onclick="submitUserList_3();">
</body>
Java代码：
@RequestMapping(value = "/submitUserList_3",method ={RequestMethod.POST})
@ResponseBody
public String submitUserList_3(@RequestBody List<User> users)
throws Exception{
String result = "";
if(users == null || users.size() <= 0){ return "No any ID.中文"; }
result = this.showUserList(users);
return result;
}
第4种方法：将表单对象序列化成Json字符串提交，以List接收 HTML代码：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>submitUserList_4</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<script language="JavaScript" src="/js/jquery.min.js" ></script>
<script type="text/javascript" language="JavaScript">
//将表单序列化成json格式的数据(但不适用于含有控件的表单，例如复选框、多选的select)
(function($){
$.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:rn" + jsonStr);
//alert(jsonStr);
$.ajax({
url: "/user/submitUserList_4",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>
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