springmvc 权限 测试版

参考博文

https://blog.csdn.net/u011277123/article/details/68940939

1.Listener加载权限信息

2.interceptor验证权限

测试代码

springmvc-servlet.xml

<mvc:interceptor>    
	        <mvc:mapping path="/**"/> 
	        <mvc:exclude-mapping path="/login/**"/>
	        <mvc:exclude-mapping path="/**/*.css"/>
	        <mvc:exclude-mapping path="/**/*.js"/>
	        <mvc:exclude-mapping path="/**/*.js"/>
	        <mvc:exclude-mapping path="/**/*.png"/>
    	    <mvc:exclude-mapping path="/**/*.gif"/>
    	    <mvc:exclude-mapping path="/**/*.jpg"/>
    	    <mvc:exclude-mapping path="/**/*.jpeg"/>
	        <bean class="*****.UserControllerInterceptor"></bean>
</mvc:interceptor>

web.xml

<listener-class>
	     ****.DictionaryCacheListener
</listener-class>

UserControllerInterceptor.java

public class UserControllerInterceptor extends HandlerInterceptorAdapter {
    
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        
    	HttpSession session = request.getSession();
    	String contextPath = request.getContextPath();
    	User user = (User)session.getAttribute("user");
    	if (user == null) {
    		response.sendRedirect(contextPath+"/login/index");
    		return false;
    	}
    	if ("post".equals(request.getMethod().toLowerCase())) {
    		System.out.println("preHandle----------------post");
    	}
    	
    	List<Integer> permissions = user.getPermissions();
    	
    	String url = request.getRequestURI();
    	int pos = url.indexOf("?");
    	String matchUrl = url;
    	if (pos != -1) {
    		matchUrl = matchUrl.substring(0, pos);
    	}
    	Map<String,Set<Integer>> urlMap= (Map<String,Set<Integer>>)request.getServletContext().getAttribute("urlsMap");
    	Set<Integer> permissionSet = urlMap.get(matchUrl);
    	if (permissionSet == null || permissionSet.size() < 1) {
    		// 无需权限,直接通过
    		return true;
    	} else {
    		for(Integer per : permissions) {
    			if (permissionSet.contains(per)) {
    				// 匹配成功
    				return true;
    			}
    		}
    		// 提示权限不足
    		// 非ajax提交
    		if (request.getHeader("x-requested-with") == null) {
    			response.sendRedirect(contextPath+"/login/unauthorized");
    		// ajax提交
    		} else {
    			response.getWriter().write("{"msg":"noPadding"}");
    		}
    		return false;
    	}
     }
}

　　DictionaryCacheListener.java

package com.ryuantech.mp.controll;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;

import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

public class DictionaryCacheListener implements javax.servlet.ServletContextListener {

    @Override
    public void contextDestroyed(ServletContextEvent arg0) {        
    }
    @Override
    public void contextInitialized(ServletContextEvent arg0) {
    	System.out.println("++++++++++++++++++　　contextInitialized 开始　　+++++++++++++++++++++");
        WebApplicationContext webApplicationContext = WebApplicationContextUtils.getWebApplicationContext(arg0.getServletContext());
//        DictionaryService dc = (DictionaryService) webApplicationContext.getBean("dictionaryService");
//        dc.getCacheDic();   // 调用数据字典Manager的一个方法来缓存
        ServletContext servletContext= webApplicationContext.getServletContext();
        Map<String,Set<Integer>> urlMap= new HashMap<String,Set<Integer>>();
		Set<Integer> set12 = new HashSet<Integer>();
		set12.add(1);
		set12.add(2);
		Set<Integer> set1 = new HashSet<Integer>();
		set1.add(1);
		String contextPath = servletContext.getContextPath();
		urlMap.put(contextPath+"/blacklist/toSelectBlacklist", set12);
		urlMap.put(contextPath+"/blacklist/selectBlacklist", set12);
		urlMap.put(contextPath+"/blacklist/delete", set1);
		urlMap.put(contextPath+"/blacklist/insert", set1);
		servletContext.setAttribute("urlsMap", urlMap);
		System.out.println("++++++++++++++++++　　数据字典已缓存　　+++++++++++++++++++++");
		System.out.println("++++++++++++++++++　　contextInitialized 结束　　+++++++++++++++++++++");
    }

}