两种 Spring 控制器方法，一种 Returns 200，另一种 Returns 404。仅映射不同 URL

Question

我有两个控制器方法如下所示，当我 post JSON 时 /garages/a 起作用（响应是 200）但是 /garages/a/brand 给出 404 . 它们仅在映射值上有所不同。

我正在使用 Spring 4.1.4.RELEASE 和 Java 配置。我没有使用 Spring Boot.

控制器方法：

@RequestMapping(value = "/garages/a", method = RequestMethod.POST, headers = "Content-Type = application/json", produces = "application/json")
public Garage specificGaragePost(
@RequestBody Garage garage) {
    return garage;
}

@RequestMapping(value = "/garages/a/brand", method = RequestMethod.POST, headers = "Content-Type = application/json", produces = "application/json")
public Garage specificGarageBrandPost(
    @RequestBody Garage garage) {
    return garage;
}

车库class

public class Garage {
    private String id;
    private String brand;
    private List<Fuel> fuels;
    private double[] location;

    //Getters and setters left out for brevity

示例 JSON（适用于 /garages/a URL 但不适用于 /garages/a/品牌）

 {
     "id": "some-id",
     "brand": "brand",
     "fuels": [],
     "location": [0,0]
 }

Answer 1

问题出在@RequestMapping 语法中。去掉headers部分的空格：

@RequestMapping(value = "/garages/a", method = RequestMethod.POST, headers = "Content-Type=application/json", produces = "application/json")

@RequestMapping(value = "/garages/a/brand", method = RequestMethod.POST, headers = "Content-Type=application/json", produces = "application/json")

更好的是，不要使用 headers 来过滤 Content-Type，而是使用专门用于该目的的消耗：

@RequestMapping(value = "/garages/a", method = RequestMethod.POST, consumes= "application/json", produces = "application/json")

@RequestMapping(value = "/garages/a/brand", method = RequestMethod.POST, consumes = "application/json", produces = "application/json")

Answer 2

因为当它找到/garages/a/brand时，它把它当作带有参数品牌的/garages/a/，但是/garages/a/不接受任何参数。

两种 Spring 控制器方法，一种 Returns 200，另一种 Returns 404。仅映射不同 URL

Two Spring Controller Methods, One Returns 200, Other Returns 404. Only Differ By The Mapping URL

java

json

spring

spring-mvc

spring-4