标签：des style class blog code java
1，java 代码中实现过滤器 通过实现import javax.servlet.Filter;接口
2，web.xml 配置需要通过过滤器的请求
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package
com.mvc.filter.user;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import
javax.servlet.ServletResponse;import
javax.servlet.http.HttpServletRequest;import
javax.servlet.http.HttpServletResponse;import
javax.servlet.http.HttpSession;public
class UserFilter implements
Filter { @Override public
void destroy() { } @Override public
void doFilter(ServletRequest req, ServletResponse resp, FilterChain fc) throws
IOException, ServletException { HttpSession session = ((HttpServletRequest) req).getSession(); HttpServletRequest request = (HttpServletRequest) req; String reqPath = request.getRequestURI(); if
(reqPath.contains("login.do")) { fc.doFilter(req, resp); } else
{ if
(session.getAttribute("loginUser") != null) { fc.doFilter(req, resp); } else
{ HttpServletResponse response = (HttpServletResponse) resp; response.sendRedirect("/login.jsp"); } } } @Override public
void init(FilterConfig arg0) throws
ServletException { }} |
<filter> <filter-name>userFilter</filter-name> <filter-class>com.mvc.filter.user.UserFilter</filter-class> </filter> <filter-mapping> <filter-name>userFilter</filter-name> <url-pattern>*.do</url-pattern> </filter-mapping>
标签：des style class blog code java
原文地址：http://www.cnblogs.com/whatadiors/p/3782641.html
