有时候我们在做权限控制的时候，需要将URL放入数据库进行保存，以便于与相应的权限关联。

如果手工键入的话，容易出错和遗漏，spring提供了RequestMappingHandlerMapping类，可以帮助我们，来获得所有的URL

在MainApplication,java中

package security;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.annotation.PostConstruct;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.mvc.method.RequestMappingInfo;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
@SpringBootApplication
@EnableAutoConfiguration(exclude = MySecurityFilter.class)
public class MainApplication{

	@Autowired
	private RequestMappingHandlerConfig requestMappingHandlerConfig;
	 
	public static void main(String[] args) {
		SpringApplication.run(MainApplication.class, args);
}
	/**
	 * 扫描URL，如果数据库中不存在，则保存入数据库
	 */
	@PostConstruct  //这个注解很重要，可以在每次启动的时候检查是否有URL更新，RequestMappingHandlerMapping只能在controller层用。这里我们放在主类中
	 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);
	            String methodstr = method.toString();
	            methodstr = methodstr.split("\\(")[0];
	            methodstr = methodstr.split(" ")[2];
	            int i=methodstr.lastIndexOf(".");
	            methodstr = methodstr.substring(0,i);
	            String urlparm = info.getPatternsCondition().toString();
	            String url = urlparm.substring(1, urlparm.length()-1);
	            List<SysResource> list = sresourceService.findByResourceString(url);
	            if(list==null || list.size()<=0){
	            	int num = (int)(Math.random()*100+1);
	            	String rand = String.valueOf(num);
	            	String resourceId = "res"+System.currentTimeMillis()+rand;
	            	SysResource sysresource = new SysResource();
	            	sysresource.setResourceString(url);
	            	sysresource.setRemark("0");
	            	sysresource.setResourceId(resourceId);
	            	sysresource.setMethodPath(methodstr);
	            	sresourceService.save(sysresource);
	            	System.out.println ("===>"+url);
	            }
	            
	        }
	    }
}

接下来：RequestMappingHandlerConfig.java

package security;//注意和主类同一个目录

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.handler.SimpleUrlHandlerMapping;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
@Configuration
public class RequestMappingHandlerConfig {
	@Bean
    public RequestMappingHandlerMapping requestMappingHandlerMapping() {
        RequestMappingHandlerMapping mapping = new RequestMappingHandlerMapping();
        return mapping;
    }
	
}