如何在 Spring REST 控制器中获取原始 JSON 主体？

Question

下面的 API 接受来自客户端的 json 字符串，并将其映射到电子邮件对象中。如何获取email原始字符串形式的请求正文 ( )？（我想要参数的原始字符串和类型版本email）

PS：这个问题不是重复的：How to access plain json body in Spring Rest Controller?

@PostMapping(value = "/mailsender")
public ResponseEntity<Void> sendMail(@RequestBody Email email) {
    //...
    return new ResponseEntity<>(HttpStatus.OK);
}

Answer 1

您可以通过不止一种方式来做到这一点，列出两种

 1. **Taking string as the paramater**,
     @PostMapping(value = "/mailsender")
        public ResponseEntity<Void> sendMail(@RequestBody String email) {
            //... the email is the string can be converted to Json using new JSONObject(email) or using jackson.
            return new ResponseEntity<>(HttpStatus.OK);
        }

 2. **Using Jackson** 
         @PostMapping(value = "/mailsender")
            public ResponseEntity<Void> sendMail(@RequestBody Email email) {
                //...
                ObjectMapper mapper = new ObjectMapper(); 
                String email = mapper.writeValueAsString(email); //this is in string now
                return new ResponseEntity<>(HttpStatus.OK);
            }