RequestMappingHandlerMapping的@Autowired无法注入问题

1.先贴上具体报的异常:

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

2.遇到问题的场景:

在使用shiro做权限管理的时候,用到了RequestMappingHandlerMapping用来获取标签以达到重新加载权限.遇到了此异常网上找到的是用@Autowired自动注入private RequestMappingHandlerMapping rmhm;启动猫一直报异常.

3.解决的方法:

先创建一个类手动配置:

package com.skykey.controller;
/**
* 创建时间：2018年9月11日 下午7:10:46  

* 项目名称：ecssm  

* @author Mamba  

* @version 1.0    

* 文件名称：RequestMappingHandlerConfig.java  
**/

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;

@Configuration
public class RequestMappingHandlerConfig{
    @Bean
    public RequestMappingHandlerMapping requestMappingHandlerMapping() {
        RequestMappingHandlerMapping mapping = new RequestMappingHandlerMapping();
        return mapping;
    }
}

然后在controller中用RequestMappingHandlerConfig获取RequestMappingHandlerMapping:

public class PermissionController {
	@Autowired
	private PermissionService ps;
	 @Autowired
	RequestMappingHandlerConfig requestMappingHandlerConfig;
	/**
	 * 
	* @Title: reloadPermission  
	* @Description: TODO 将权限表达式动态加载到数据库中的权限表中
	* @param @return
	* @return String 
	* @throws
	 */
	@RequestMapping("/reloadPermission")
	public String reloadPermission(){
		//获取所有带有requestmapping标签的方法
		// 读取方法上的RequestMapping注解信息
		 final RequestMappingHandlerMapping requestMappingHandlerMapping = requestMappingHandlerConfig.requestMappingHandlerMapping ();
		Map<RequestMappingInfo, HandlerMethod> handlerMethods = requestMappingHandlerMapping.getHandlerMethods();
}
}

好了,可以完美获取到,解决!!!

文章参考:https://blog.csdn.net/jdk2006/article/details/51500831

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