java - 为什么 @HeadMapping 在 Spring MVC 中不可用？

Question

Spring框架中包含以下注解:
@GetMapping、@PostMapping、@PutMapping、@DeleteMapping 和 @PatchMapping标准的 Spring MVC Controller 方法。但是 @HeadMapping 不是。这有什么意义？

Answer 1

您总是可以回退到@RequestMapping。此注解支持所有类型的 HTTP 方法。所以 @RequestMapping(method = { RequestMethod.HEAD }) 确实完成了这项工作!

---

如果你真的想使用@HeadMapping，你可以自己创建:

@target({ ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@RequestMapping(method = { RequestMethod.HEAD})
public @interface HeadMapping {
    @AliasFor(annotation = RequestMapping.class)
    String name() default "";

    @AliasFor(annotation = RequestMapping.class)
    String[] value() default {};

    @AliasFor(annotation = RequestMapping.class)
    String[] path() default {};

    @AliasFor(annotation = RequestMapping.class)
    String[] params() default {};

    @AliasFor(annotation = RequestMapping.class)
    String[] headers() default {};

    @AliasFor(annotation = RequestMapping.class)
    String[] consumes() default {};

    @AliasFor(annotation = RequestMapping.class)
    String[] produces() default {};
}