使用 Spring 处理映射在 REST 应用程序中的模糊处理程序方法 [英] Handling ambiguous handler methods mapped in REST application with Spring
问题描述
我尝试使用以下代码:
@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public Brand getBrand(@PathVariable Integer id) {
return brandService.getOne(id);
}
@RequestMapping(value = "/{name}", method = RequestMethod.GET)
public List<Brand> getBrand(@PathVariable String name) {
return brandService.getSome(name);
}
但是我遇到了这样的错误,我该怎么办?
But I got error like this, how can I do?
java.lang.IllegalStateException: Ambiguous handler methods mapped for HTTP path 'http://localhost:8080/api/brand/1': {public java.util.List com.zangland.controller.BrandController.getBrand(java.lang.String), public com.zangland.entity.Brand com.zangland.controller.BrandController.getBrand(java.lang.Integer)}
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.lookupHandlerMethod(AbstractHandlerMethodMapping.java:375) ~[spring-webmvc-4.2.4.RELEASE.jar:4.2.4.RELEASE]
推荐答案
Spring 无法区分请求 GET http://localhost:8080/api/brand/1
是否会被处理getBrand(Integer)
或 getBrand(String)
因为你的映射不明确.
Spring can't distinguish if the request GET http://localhost:8080/api/brand/1
will be handled by getBrand(Integer)
or by getBrand(String)
because your mapping is ambiguous.
尝试为 getBrand(String)
方法使用查询参数.这似乎更合适,因为您正在执行查询:
Try using a query parameter for the getBrand(String)
method. It seems more appropriate, since you are performing a query:
@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public Brand getBrand(@PathVariable Integer id) {
return brandService.getOne(id);
}
@RequestMapping(method = RequestMethod.GET)
public List<Brand> getBrands(@RequestParam(value="name") String name) {
return brandService.getSome(name);
}
使用上述方法:
- 像
GET http://localhost:8080/api/brand/1
这样的请求将由getBrand(Integer)
处理. - 像
GET http://localhost:8080/api/brand?name=nike
这样的请求将由getBrand(String)
处理.
- Requests like
GET http://localhost:8080/api/brand/1
will be handled bygetBrand(Integer)
. - Requests like
GET http://localhost:8080/api/brand?name=nike
will be handled bygetBrand(String)
.
提示:作为一种常见的做法,对于资源集合,更喜欢使用复数名词.因此,不要使用 /brand
,而是使用 /brands
.
Just a hint: As a common practice, prefer plural nouns for collections of resources. So instead of /brand
, use /brands
.
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