SpringBoot获取前端传递Json的几种方法

一、Json对象+@RequestBody接收

var val = {id: 1, name: "小明"};
$.ajax({
    url: "/getJson",
    dataType: "JSON",
    type: "post",
    contentType: 'application/json;charset=UTF-8',
    data: JSON.stringify(val),
    success: function (msg) {
        console.log(msg)
    }
})

后端获取参数：Map<String,Object>

@PostMapping("/getJson")

@ResponseBody

public Map getJsonVal(@RequestBody Map user) {

System.out.println("user = "+ user.get("id"));

System.out.println("user = "+ user.get("name"));

returnuser;

}

后端获取参数：对象

@PostMapping("/getJson")

@ResponseBody

public User getJsonVal(@RequestBody User user) {

returnuser;

}

二、传JSON对象#

var val = {"id": 1,"name":"小明"};

$.ajax({

url:"/getJson",

dataType:"JSON",

type:"post",

// contentType:'application/json;charset=UTF-8', //不能加

data: val,

success:function(msg) {

console.log(msg)

}

})

后端获取参数

@PostMapping("/getJson")

@ResponseBody

public User getJsonVal(@RequestParam("id") String id,@RequestParam("name") String name) {

User user = new User();

user.setId(Integer.parseInt(id));

user.setName(name);

returnuser;

}

三、json集合+@RequestBody接收#

var val = [{"id": 1,"name":"小明"},{"id": 2,"name":"小红"}];

$.ajax({

url:"/getJson",

dataType:"JSON",

type:"post",

contentType:'application/json;charset=UTF-8', //不能加

data: JSON.stringify(val),

success:function(msg) {

console.log(msg)

}

})

后端获取参数

@PostMapping("/getJson")

@ResponseBody

public List getJsonVal(@RequestBody List user) throws IOException {

for(User user2 : user){

System.out.println("user2 = "+ user2);

}

returnuser;

}