spring security3 URL监听类_springsecurity监听特定类-优快云博客

本文介绍了一个用于Spring Security的监听器实现，该监听器在应用启动时加载URL权限，并将其存储在ServletContext中以便全局访问。当应用关闭时，监听器会清除这些权限设置。

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package com.payds.comm.security;

import java.util.Map;

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

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

import com.payds.comm.service.SecurityManager;
public class SpringSecurityListener implements ServletContextListener {

    /* (non-Javadoc)
     * @see javax.servlet.ServletContextListener#contextInitialized(javax.servlet.ServletContextEvent)
     */
    public void contextInitialized(ServletContextEvent servletContextEvent) {
        ServletContext servletContext = servletContextEvent.getServletContext();
        SecurityManager securityManager = this.getSecurityManager(servletContext);

        Map<String, String> urlAuthorities = securityManager.loadUrlAuthorities();
        servletContext.setAttribute("urlAuthorities", urlAuthorities);
    }


    /* (non-Javadoc)
     * @see javax.servlet.ServletContextListener#contextDestroyed(javax.servlet.ServletContextEvent)
     */
    public void contextDestroyed(ServletContextEvent servletContextEvent) {
        servletContextEvent.getServletContext().removeAttribute("urlAuthorities");
    }

    /**
     * Get SecurityManager from ApplicationContext
     *
     * @param servletContext
     * @return
     */
    protected SecurityManager getSecurityManager(ServletContext servletContext) {
       return (SecurityManager) WebApplicationContextUtils.getWebApplicationContext(servletContext).getBean("securityManager");
    }

}