通过过滤器判断用户权限. 第一步:建立UserPermissionFilter类.
import javax.servlet.*; import javax.servlet.http.*; import java.io.*; import java.util.*;
import test.system.SysUserApi; import test.vo.SysUserVO; import test.system.dao.SysUserDao; import test.Const;
public class UserPermissionFilter extends HttpServlet implements Filter {
protected FilterConfig filterConfig = null;
public void destroy() { this.filterConfig = null; }
public void doFilter( ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException { try { HttpServletRequest req = (HttpServletRequest) request; SysUserVO userSession = new SysUserVO(); userSession = (SysUserVO)req.getSession().getAttribute(Const.SESSION_USER); if (userSession == null) { HttpServletResponse rep = (HttpServletResponse) response;
rep.sendRedirect("/admin/login.jsp"); }else{ filterChain.doFilter(request, response); } } catch (Exception e) {} } public void init(FilterConfig filterConfig) throws ServletException { this.filterConfig = filterConfig; } public FilterConfig getFilterConfig() { return filterConfig; }
public void setFilterConfig(FilterConfig filterConfig) { this.filterConfig = filterConfig; }
}
第二步:配置WEB.xml文件 设置过滤器: <filter> <filter-name>userpermission</filter-name> <filter-class>sports.tools.UserPermissionFilter</filter-class> </filter> 设置过滤器映射,因为过滤器不能过滤全部的程序,所以可以用列表的形式来增加需要过滤的文件.如下.一个过滤器可以过滤多个映射文件. <filter-mapping> <filter-name>userpermission</filter-name> <url-pattern>/admin/index.jsp</url-pattern> </filter-mapping>
<filter-mapping> <filter-name>userpermission</filter-name> <url-pattern>/admin/edit/*</url-pattern>
</filter-mapping>
[Sql Server]Sql精妙语句--各种求值函数 [网页制作]网页表格之---多个表格纵向排列 [网页制作]JavaScript另类用法--读取和写入cookie [网页制作]号称非常安全的上网工具---360安全浏览器介绍 [办公软件]信息技术教学篇---Word工具栏的显示、隐藏及四种菜… [操作系统]开始菜单---运行命令大总结 [操作系统]网络转载---64位操作系统与32位的区别 [操作系统]ldap:///(没有响应)Windows无法访问指定设备、路径… [网络技术]安全篇---交换机设置方法介绍 [聊天工具]Real10 & Xpdf installation on Linux Box
|