如何在Spring REST控制器方法中从RequestBody获取参数

Question

在Spring Boot应用程序中，我在Controller具有以下方法签名：

@PostMapping(value="/borrow")
public ResponseEntity<Void> postBorrowBook(@RequestBody String personId, 
                                           @RequestBody String bookId) {    
    LOG.info(RESTController.class.getName() + ".postBorrowBook() method called.");   

    ...

    return new ResponseEntity<Void>(HttpStatus.OK);        
}      

我想从RequestBody获取两个参数的RequestBody 。

如果我发出的请求如下所示，有人可以让我知道如何完成此操作：

{"personId":"207","bookId":"5"}

我目前收到：

{
"timestamp": "2018-06-17T20:59:37.330+0000",
"status": 400,
"error": "Bad Request",
"message": "Required request body is missing: public org.springframework.http.ResponseEntity<java.lang.Void> com.city2018.webapps.code.controller.RESTController.postBorrowBook(java.lang.String,java.lang.String)",
"path": "/rest/borrow/"
}

对于简单的非REST请求，我已经在类似情况下进行了以下工作：

@RequestMapping(value="/borrow", method=RequestMethod.POST)
    public String postBorrowBook(@RequestParam("personId") String personId, 
                                 @RequestParam("bookId") String bookId,
                                 Model model) {    
        LOG.info(PersonController.class.getName() + ".postBorrowBook() method called.");  

Answer 1

您可以声明具有2个字段（ personId和bookId ）的POJO并按以下方式更改签名：

@PostMapping(value="/borrow")
public ResponseEntity<Void> postBorrowBook(@RequestBody RequestDTO requestBody) {
    requestBody.getPersonId();
    requestBody.getBookId();
    ...
}

Answer 2

1. 首先，您应该将POJO类定义为：

   公共类BorrowBookEntity {public String personId; public String bookId; }

2. 然后，您依靠spring获得值为：

    @PostMapping("/request") public ResponseEntity<Void> postController( @RequestBody BorrowBookEntity borrowBookEntity) { ... 

Answer 3

您也可以尝试其他。 例如@RequestBodyParam

@RequestMapping(value = "/saveData", headers="Content-Type=application/json", method = RequestMethod.POST)
@ResponseBody
public ResponseEntity<Boolean> saveData(@RequestBodyParam String source,@RequestBodyParam JsonDto json) throws MyException {
    ...
}

https://github.com/LambdaExpression/RequestBodyParam