首先是这种
@RequestMapping(value="/a")
public String a() {
return "a";
}
@RequestMapping(value="/a")
public String d() {
return "a";
}
这个应该都知道了，肯定会报错的
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping.
错误信息也很明确Ambiguous mapping。
那是不是value的值一定不能一样呢，答案是否定的
@RestController
public class TestController {
@RequestMapping(value="/a")
public String a() {
return "a";
}
@RequestMapping(value="/a", method = RequestMethod.HEAD)
public ResponseEntity<Void> b() {
return ResponseEntity.ok().header("b", "b").build();
}
@RequestMapping(value="/a", method = RequestMethod.GET)
public String c() {
return "c";
}
}
1.png
2.png
3.png
从结果可以看出，只要指定不同method就行。而且会优先匹配对应的方法，没有才会执行没有指定method的@RequestMapping对应方法
