利用RequestMappingHandlerMapping提取Spring MVC @RequestMapping

Spring MVC 映射注入类继承结构

其中getHandlerMethods能够获取所有处理方法和映射，代码如下：

    /**     * Return a map with all handler methods and their mappings.     */    public Map<T, HandlerMethod> getHandlerMethods() {        return Collections.unmodifiableMap(this.handlerMethods);    }

如果能够获得RequestMappingInfoHaddlerMapping Bean实例，就能通过getHandlerMethods（）方法得到使用Spring MVC注解的处理方法和映射对象RequestMappingInfo。

RequestMappingInfo存储中所有Handler的配置信息。

使用@Configuration注解配置Bean，获取RequestMappingHandlerMapping

package com.zokapper.configration;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;@Configurationpublic class RequestMappingHandlerConfig{    @Bean    public RequestMappingHandlerMapping requestMappingHandlerMapping() {        RequestMappingHandlerMapping mapping = new RequestMappingHandlerMapping();        return mapping;    }}

编写测试类测试

package com.zokapper.configuration;import java.util.HashMap;import java.util.Map;import java.util.Set;import org.junit.Before;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.core.annotation.AnnotationUtils;import org.springframework.mock.web.MockHttpServletRequest;import org.springframework.mock.web.MockHttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.method.HandlerMethod;import org.springframework.web.servlet.mvc.method.RequestMappingInfo;import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;import com.zokapper.configuration.RequestMappingHandlerConfig;@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations = {  "classpath:applicationContext-[MVC].xml","classpath:applicationContext.xml"})public class RequestMappingHandlerConfigTest {    @Autowired    RequestMappingHandlerConfig requestMappingHandlerConfig;    //Spring MVC 提取注解中URL映射    @Test    public void detectHandlerMethods(){        final RequestMappingHandlerMapping requestMappingHandlerMapping = requestMappingHandlerConfig.requestMappingHandlerMapping ();        Map<RequestMappingInfo, HandlerMethod> map = requestMappingHandlerMapping.getHandlerMethods();        Set<RequestMappingInfo> mappings = map.keySet();        Map<String, String> reversedMap = new HashMap<String, String>();        for(RequestMappingInfo info : mappings) {            HandlerMethod method = map.get(info);            System.out.println (method.toString()+"===>"+info.getPatternsCondition().toString());        }    }}