java - 如何在Java中输入def注解

Question

我有一组具有非常相似的注释声明的方法，如何缩短它们？不要到处重复它们？

@RequestMapping(value = "/relative_path", 
        method = RequestMethod.GET,
        consumes = "appilcation/json",
        produces = "appilcation/json")
@ResponseBody
public User method1(HttpServletRequest httpServletRequest,
                  @RequestBody String requestBody)
{...}

Answer 1

您可以为此创建一个 spring 元注释:

@RequestMapping(value = "/relative_path", 
    method = RequestMethod.GET,
    consumes = "appilcation/json",
    produces = "appilcation/json")
@ResponseBody
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface MyAnnotation {
}

并在您的方法中使用它:

@MyAnnotation
public User method1(HttpServletRequest httpServletRequest,
                  @RequestBody String requestBody) { }

解决方案:

@RequestMapping(method = RequestMethod.POST,
        consumes = "appilcation/json",
        produces = "appilcation/json")
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface MyAnnotation {
}

@RequestMapping(value = "/relative_path")
@MyAnnotation
public User method1(HttpServletRequest httpServletRequest,
                  @RequestBody String requestBody) { }