SpringMVC获取集合类型参数
方法一
将集合参数包装成POJO。
- 包装类
public class Vo {
private List<User> users;
@Override
public String toString() {
return "Vo{" +
"users=" + users +
'}';
}
public List<User> getUsers() {
return users;
}
public void setUsers(List<User> users) {
this.users = users;
}
}
tips: user的属性不要使用包装类型，如Integer,不然会报错。
- controller:
@RequestMapping("/list.do")
@ResponseBody
//获取集合类型参数时，集合中类对象user中的属性不能使用包装类型，如Integer
public ModelAndView doList(Vo vo){
ModelAndView modelAndView = new ModelAndView();
List<User> users = vo.getUsers();
users.forEach(u-> System.out.println(u));
modelAndView.addObject("users",users);
modelAndView.setViewName("target");
return modelAndView;
}
- 初始界面和结果界面
<form action="user/list.do" method="post">
姓名1：<input type ="text" name="users[0].name"><br>
年龄1：<input type ="text" name="users[0].age"><br>
姓名2：<input type ="text" name="users[1].name"><br>
姓名2：<input type ="text" name="users[1].age"><br>
<input type="submit" value="提交">
</form>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<table border="1">
<thead>
<tr>
<td>姓名</td>
<td>年龄</td>
</tr>
</thead>
<tbody>
<c:forEach var="users" items="${users}" varStatus="s">
<tr>
<td>${users.name}</td>
<td>${users.age}</td>
</tr>
</c:forEach>
</tbody>
</table>
</body>
</html>
方法二：
@RequestMapping("/ajax.do")
@ResponseBody
public void doListOfAjax(@RequestBody List<User> users){
users.forEach(u-> System.out.println(u));
}
<script>
let array = new Array();
array.push({"name":"黄振聪","age":21})
array.push({"name":"黄大大","age":22})
$(function () {
$(".btn").click(function () {
$.ajax({
url:"user/ajax.do",
type:"post",
data:JSON.stringify(array),
dataType:"json",
contentType:"application/json;charset=utf-8"
})
})
})
</script>
