Springboot return map value by ascending order (meaning is carried out in accordance with the order-CodePudding

Design the map below:

 map. The put (" 46 ", "daf"); 
The map. The put (" a2 ", "daf"); 
The map. The put (" 3 ", "daf"); 
The map. The put (" e1 ", "333");

Expect output in the above order, as a result, unlike expectations,

How to deal with this problem?

The code is as follows:
1, the controller

 @ RestController 
@ RequestMapping ("/test ") 
@ Api (tags={} "test map", the description="test map111") 
Public class TestController {
@ PostMapping ("/test ") 
@ ApiOperation (" MAP ") 
Public ResultBody The test () {
The Map Map=new HashedMap (); 
The map. The put (" 46 ", "daf"); 
The map. The put (" a2 ", "daf"); 
The map. The put (" 3 ", "daf"); 
The map. The put (" e1 ", "333"); 
System. The out. Println (map. The size ()); 
Return new ResultBody (map); 
} 
}

2, ResultBody

 @ Data 
@ AllArgsConstructor 
@ NoArgsConstructor 
Public class ResultBody Implements the Serializable {
private String code; 
Private String MSG. 
Private T data; 

Public ResultBody (String code) {
This. Code=code; 
This. MSG=the ResultCode. SELECT_SUCCESS. GetCode (); 
} 

Public ResultBody (String code, String MSG) {
This. Code=code; 
This. MSG=MSG; 
} 

Public ResultBody (T data) {
This. Code=the ResultCode. SELECT_SUCCESS. GetCode (); 
This data=https://bbs.csdn.net/topics/data; 
This. MSG=the ResultCode. SELECT_SUCCESS. GetMsg (); 
} 

Public static ResultBody success () {
Return new ResultBody (the ResultCode. SELECT_SUCCESS. GetCode ()); 
} 

Public static ResultBody success (Object data) {
Return new ResultBody (data); 
} 

Public static ResultBody fail () {
Return new ResultBody (the ResultCode. SELECT_ERROR); 
} 

Public static ResultBody fail (String code, String MSG) {
Return new ResultBody (code, MSG); 
} 

Public static & lt; T> ResultBody Failed (IErrorCode errorCode) {
Return new ResultBody (errorCode. GetCode (), errorCode. GetMsg (), null); 
} 

}

CodePudding user response:

That use LinkHashedMap

CodePudding user response:

LinkHashedMap used, no matter use, I guess is a problem of Jackson, but don't know how to solve,

CodePudding user response:

1. Yourself into a string to the front desk, the automatic conversion of the
no spring2. Change the data structure, with the list