@RequestBody和@RequestParam都不起作用

Question

我想在春天做一个PUT电话.

这是我的控制器代码:

@RequestMapping(value = "/magic", method = RequestMethod.PUT)
    TodoDTO magic(@RequestBody String id){
        return service.magic(id);
    }

因为我想在通话中传递一个id字符串.

问题是,我收到了这个

{
  "timestamp": 1486644310464,
  "status": 500,
  "error": "Internal Server Error",
  "exception": "java.lang.NullPointerException",
  "message": "{\n\t\"id\":\"589c5e322abb5f28631ef2cc\"\n}",
  "path": "/api/todo/magic"
}

如果我改变这样的代码:

@RequestMapping(value = "/magic", method = RequestMethod.PUT)
    TodoDTO magic(@RequestParam(value = "id") String id){
        return service.magic(id);
    }

我收到

{
  "timestamp": 1486644539977,
  "status": 400,
  "error": "Bad Request",
  "exception": "org.springframework.web.bind.MissingServletRequestParameterException",
  "message": "Required String parameter 'id' is not present",
  "path": "/api/todo/magic"
}

我做了同样的电话,一个PUT在链接http:// localhost:8080/api/todo/magic with body

{
    "id":"589c5e322abb5f28631ef2cc"
}

这是我的数据库中一个对象的id.

我的问题是,我怎样才能实现目标？如果我通过链接传递参数,如api/todo/magic/589c5e322abb5f28631ef2cc,@ PathVariable,它的工作原理

Answer 1

创建您自己的自定义类,如下所示

Class Request
{
private String id;
//getter and setter
}

并改变方法

@RequestMapping(value = "/magic", method = RequestMethod.PUT)
    TodoDTO magic(@RequestBody Request request){
        return service.magic(request.getId());
    }

您也可以在url中使用id并在方法签名中使用@Pathvariable

@RequestMapping(value = "/magic/{id}", method = RequestMethod.PUT)
        TodoDTO magic(@PathVariable String id){
            return service.magic(request.getId());
        }