Spring RequestMapping适用于产生和使用JSON的控制器

从Spring 4.2.x开始，您可以创建自定义映射注释，并将其

@RequestMapping

有没有一种方法可以产生带有消费和生产默认值的“复合/继承/聚合”注释，所以我可以这样写：

@JSonRequestMapping(value = "/foo", method = RequestMethod.POST)

是的，有这种方法。您可以创建如下的元注释：

@Target({ElementType.METHOD, ElementType.TYPE})@Retention(RetentionPolicy.RUNTIME)@RequestMapping(consumes = "application/json", produces = "application/json")public @interface JsonRequestMapping {    @AliasFor(annotation = RequestMapping.class, attribute = "value")    String[] value() default {};    @AliasFor(annotation = RequestMapping.class, attribute = "method")    RequestMethod[] method() default {};    @AliasFor(annotation = RequestMapping.class, attribute = "params")    String[] params() default {};    @AliasFor(annotation = RequestMapping.class, attribute = "headers")    String[] headers() default {};    @AliasFor(annotation = RequestMapping.class, attribute = "consumes")    String[] consumes() default {};    @AliasFor(annotation = RequestMapping.class, attribute = "produces")    String[] produces() default {};}

然后，您可以使用默认设置，甚至可以根据需要覆盖它们：

@JsonRequestMapping(method = POST)public String defaultSettings() {    return "Default settings";}@JsonRequestMapping(value = "/override", method = PUT, produces = "text/plain")public String overrideSome(@RequestBody String json) {    return json;}

您可以

AliasFor