查找HTTP动词，该动词应为GET，POST，PUT，DELETE，OPTIONS或HEAD。

import java.lang.annotation.Annotation;

import java.lang.reflect.Method;

import javax.ws.rs.DELETE;
/* 
 来自 
*N o w J a v a . c o m - 时代Java*/

import javax.ws.rs.GET;

import javax.ws.rs.HEAD;

import javax.ws.rs.HttpMethod;

import javax.ws.rs.OPTIONS;

import javax.ws.rs.POST;

import javax.ws.rs.PUT;


public class Main{

    /**

     * Look for the HTTP verb which should be {@link GET}, {@link POST}, {@link PUT}, {@link DELETE}, {@link OPTIONS} or {@link HEAD}.

     * 

     * @param method - that potentially has an annotation.

     * @return {@link HttpMethod} or null.

     */

    public static HttpMethod resolveHttpType(Method method) {

        for (Annotation annotation : method.getDeclaredAnnotations()) {

            final HttpMethod httpMethod = annotation.annotationType()

                    .getAnnotation(HttpMethod.class);
                    /**
                    N o w