我們在使用ResponseEntity時，更多的是為了設(shè)置不同的HttpResponse Code，如果你的系統(tǒng)偏好是通過Response Body中的Code來判斷API狀態(tài)即幾乎所有API的HttpResponse Code=200，那么完全可以不使用ResponseEntity作為返回數(shù)據(jù)類型，只需要去返回Response Body，通過Body中開發(fā)者自定義的Code給API設(shè)置狀態(tài)

例如 Response Body

{
    code: 200,
    ErrorMessage: "error message",
    data: {}
}

Get請求時

return ResponseEntity.ok();

@GetMapping({"findAll"})
    public ResponseEntity<PageResult<User>> findAll(@RequestParam(name = "admin", required = false) String admin, @RequestParam(name = "page", defaultValue = "1") Integer page, @RequestParam(name = "rows", defaultValue = "10") Integer rows) {
        PageResult<User> userPageResult = this.userService.findAll(admin, page, rows);
        return ResponseEntity.ok(userPageResult);
    }

Post請求新增一條記錄時,有返回值

return ResponseEntity.status(HttpStatus.CREATE).body();()存放返回的內(nèi)容

@PostMapping("save")
 public ResponseEntity save(@RequestBody User user) throws Exception {
        return ResponseEntity.status(HttpStatus.CREATED).body(this.userService.save(user));
    }

Post請求新增一條記錄時,無返回值

return new ResponseEntity(HttpStatus.CREATED);

Delete刪除請求,無返回

return new ResponseEntity(HttpStatus.NO_CONTENT);

@DeleteMapping({"delete"})
    public ResponseEntity delete(@RequestParam(name = "ids") Integer[] ids) {
        return ResponseEntity.ok(this.userService.delete(ids));
    }

Put更新請求，無返回值

ResponseEntity.noContent().build();

@PutMapping({"update"})
    public ResponseEntity update(@RequestBody User user) throws Exception {
        return ResponseEntity.ok(this.userService.update(user));
    }