doFilter不起作用???
刚写的Filter:Java code
import javax.servlet.*;
import javax.servlet.http.*;
public class LogFilter implements Filter{
FilterConfig filterConfig = null;
public void init(FilterConfig filterConfig) {
System.out.println("Filter Begin...");
this.filterConfig = filterConfig;
}
public void destroy(){
System.out.println("Filter Des...");
this.filterConfig = null;
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain){
System.out.println("doFilter");
try{
((HttpServletResponse )response).sendRedirect("result.jsp");
ServletContext sc = filterConfig.getServletContext();
long before =System.currentTimeMillis();
System.out.println("getServletPath:"+((HttpServletRequest)request).getServletPath());
System.out.println("getRequestURI:"+((HttpServletRequest)request).getRequestURI());
chain.doFilter(request,response);
long after = System.currentTimeMillis();
System.out.println(after-before);
}catch(Exception e){
e.printStackTrace();
}
}
}
xml配置:
Plain Text code
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0"
metadata-complete="true">
<servlet>
<servlet-name>loginServlet</servlet-name>
<servlet-class>LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>loginServlet</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
<filter>
<filter-name>log</filter-name>
<filter-class>fil.LogFilter</filter-class>
</filter>
<fiter-mapping>
<filter-name>log</filter-name>
<url-pattern>/*</url-pattern>
</fiter-mapping>
</web-app>
为什么只有init()和destroy()方法执行？而且还是在Applications开启的时候执行。执行jsp或servlet都不过滤？ --------------------编程问答-------------------- 配置没发现问题。Servlet 执行了没 --------------------编程问答-------------------- 你的filter是在fil包下吗？ --------------------编程问答--------------------
Servlet执行了！ --------------------编程问答--------------------
在！
补充：Java , Web 开发
