<%@?page?contentType="text/html;charset=UTF-8"?language="java"?%>
<html>
<head>
????<title>TestFilter</title>
</head>
<body>
<h1>這是main.jsp</h1>
</body>
</html>
<%@?page?contentType="text/html;charset=UTF-8"?language="java"?%>
<html>
<head>
????<title>TestFilter</title>
</head>
<body>
tttttttttttttttttttttttttttttt
</body>
</html>
<?xml?version="1.0"?encoding="UTF-8"?>
<web-app?xmlns="http://xmlns.jcp.org/xml/ns/javaee"
?????????xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
?????????xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee?http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
?????????version="3.1">
????<welcome-file-list>
????????<welcome-file>index.jsp</welcome-file>
????</welcome-file-list>
????<filter>
????????<filter-name>FirstFilter</filter-name>
????????<filter-class>com.filter.FirstFilter</filter-class>
????</filter>
????<filter-mapping>
????????<filter-name>FirstFilter</filter-name>
????????<url-pattern>/main.jsp</url-pattern>
????</filter-mapping>
</web-app>
public?class?FirstFilter?implements?javax.servlet.Filter{
????@Override
????public?void?init(FilterConfig?filterConfig)?throws?ServletException?{
????????System.out.println("init.....................FirstFilter");
????}
????@Override
????public?void?doFilter(ServletRequest?servletRequest,?ServletResponse?servletResponse,?FilterChain?filterChain)?throws?IOException,?ServletException?{
????????System.out.println("start.....................doFirstFilter");
????????HttpServletRequest?request?=?(HttpServletRequest)?servletRequest;
????????HttpServletResponse?response?=?(HttpServletResponse)?servletResponse;
????????//重定向
//????????response.sendRedirect(request.getContextPath()+"/index.jsp");
????????//轉(zhuǎn)發(fā)
????????request.getRequestDispatcher("index.jsp").forward(servletRequest,servletResponse);
//????????filterChain.doFilter(servletRequest,servletResponse);
????????System.out.println("end.......................doFirstFilter");
????}
????@Override
????public?void?destroy()?{
????????System.out.println("destroy...................FirstFilter");
????}
}
想通過過濾器跳轉(zhuǎn)到到index.jsp中，轉(zhuǎn)發(fā)和重定向都試過了，還是一點(diǎn)反應(yīng)都沒
2017-08-30
dofilter方法中你已設(shè)定了傳入?yún)?shù)為servletRequest，但你用的是自定義的request 我覺得問題可能是這里，我也是新手