因为缺失POST GET注解而导致Failed processing arguments of org.jboss.resteasy.spi.metadata.ResourceLocator

面向服务的架构现在如火如荼，国内常用的当属阿里巴巴开源的dubbo，但我觉得后起之秀的spring cloud很可能弯道超车。闲话说了一些，下面入主题，出问题rest服务接口

    @Path("queryList")

    //@POST---漏掉@POST注解就会出错

    @Override

下面来分析下POST注解：

@Target({ElementType.METHOD})

@Retention(RetentionPolicy.RUNTIME)

@HttpMethod(HttpMethod.POST)

@Documented

public @interface POST {

}

这个里面又涉及到一个主要的注解HttpMethod：

/**

 * Associates the name of a HTTP method with an annotation. A Java method annotated

 * with a runtime annotation that is itself annotated with this annotation will

 * be used to handle HTTP requests of the indicated HTTP method. It is an error

 * for a method to be annotated with more than one annotation that is annotated

 * with {@code HttpMethod}.

 *

 * @author Paul Sandoz

 * @author Marc Hadley

 * @see GET

 * @see POST

 * @see PUT

 * @see DELETE

 * @see HEAD

 * @since 1.0

 */

@Target({ElementType.ANNOTATION_TYPE})

@Retention(RetentionPolicy.RUNTIME)

@Documented

public @interface HttpMethod

该接口doc说明概括下来就是：

HttpMethod(或者扩展注解接口)注解的方法会被用来处理相应HTTP请求方法(POST/GET/PUT等)请求，如果漏掉这个注解，那么相应的方法就没有了这个能力！！