Spring MVC过滤器-登录过滤

以下代码是继承OncePerRequestFilter实现登录过滤的代码：

    /** 
     * 
     * @author geloin 
     * @date 2012-4-10 下午2:37:38 
     */  
    package com.test.spring.filter;  
      
    import java.io.IOException;  
    import java.io.PrintWriter;  
      
    import javax.servlet.FilterChain;  
    import javax.servlet.ServletException;  
    import javax.servlet.http.HttpServletRequest;  
    import javax.servlet.http.HttpServletResponse;  
      
    import org.springframework.web.filter.OncePerRequestFilter;  
      
    /** 
     * 登录过滤 
     *  
     * @author geloin 
     * @date 2012-4-10 下午2:37:38 
     */  
    public class SessionFilter extends OncePerRequestFilter {  
      
        /* 
         * (non-Javadoc) 
         *  
         * @see 
         * org.springframework.web.filter.OncePerRequestFilter#doFilterInternal( 
         * javax.servlet.http.HttpServletRequest, 
         * javax.servlet.http.HttpServletResponse, javax.servlet.FilterChain) 
         */  
        @Override  
        protected void doFilterInternal(HttpServletRequest request,  
                HttpServletResponse response, FilterChain filterChain)  
                throws ServletException, IOException {  
      
            // 不过滤的uri  
            String[] notFilter = new String[] { "login.html", "index.html" };  
      
            // 请求的uri  
            String uri = request.getRequestURI();  
      
            // uri中包含background时才进行过滤  
            if (uri.indexOf("background") != -1) {  
                // 是否过滤  
                boolean doFilter = true;  
                for (String s : notFilter) {  
                    if (uri.indexOf(s) != -1) {  
                        // 如果uri中包含不过滤的uri，则不进行过滤  
                        doFilter = false;  
                        break;  
                    }  
                }  
                if (doFilter) {  
                    // 执行过滤  
                    // 从session中获取登录者实体  
                    Object obj = request.getSession().getAttribute("loginedUser");  
                    if (null == obj) {  
                        // 如果session中不存在登录者实体，则弹出框提示重新登录  
                        // 设置request和response的字符集，防止乱码  
                        request.setCharacterEncoding("UTF-8");  
                        response.setCharacterEncoding("UTF-8");  
                        PrintWriter out = response.getWriter();  
                        String loginPage = "....";  
                        StringBuilder builder = new StringBuilder();  
                        builder.append("<script type="text/javascript">");  
                        builder.append("alert('网页过期，请重新登录！');");  
                        builder.append("window.top.location.href='");  
                        builder.append(loginPage);  
                        builder.append("';");  
                        builder.append("</script>");  
                        out.print(builder.toString());  
                    } else {  
                        // 如果session中存在登录者实体，则继续  
                        filterChain.doFilter(request, response);  
                    }  
                } else {  
                    // 如果不执行过滤，则继续  
                    filterChain.doFilter(request, response);  
                }  
            } else {  
                // 如果uri中不包含background，则继续  
                filterChain.doFilter(request, response);  
            }  
        }  
      
    }  

    <filter>  
        <filter-name>sessionFilter</filter-name>  
        <filter-class>com.test.spring.filter.SessionFilter</filter-class>  
    </filter>  
    <filter-mapping>  
        <filter-name>sessionFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>  

最后

以上就是勤奋哈密瓜为你收集整理的Spring MVC过滤器-登录过滤的全部内容，希望文章能够帮你解决Spring MVC过滤器-登录过滤所遇到的程序开发问题。

如果觉得靠谱客网站的内容还不错，欢迎将靠谱客网站推荐给程序员好友。