package com.java1234.filter;
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.HttpSession;
public class LoginFilter implements Filter{
public void destroy() {
// TODO Auto-generated method stub
}
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest request=(HttpServletRequest)servletRequest;
HttpSession session=request.getSession();
Object o=session.getAttribute("currentUser");
String path=request.getServletPath();
if(o==null&&path.indexOf("login")<0){
request.getRequestDispatcher("login.jsp").forward(servletRequest, servletResponse);
}else{
filterChain.doFilter(servletRequest, servletResponse);
}
}
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
}
}
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>HeadFirstJspServletChap05</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>helloWorldServlet</servlet-name>
<servlet-class>com.java1234.web.HelloWorldServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>helloWorldServlet</servlet-name>
<url-pattern>/helloWorld</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>lifeServlet</servlet-name>
<servlet-class>com.java1234.web.LifeServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>lifeServlet</servlet-name>
<url-pattern>/life</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>redirectServlet</servlet-name>
<servlet-class>com.java1234.web.RedirectServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>redirectServlet</servlet-name>
<url-pattern>/redirect</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>forwardServlet</servlet-name>
<servlet-class>com.java1234.web.ForwardServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>forwardServlet</servlet-name>
<url-pattern>/forward</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>loginServlet</servlet-name>
<servlet-class>com.java1234.web.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>loginServlet</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>logoutServlet</servlet-name>
<servlet-class>com.java1234.web.LogoutServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>logoutServlet</servlet-name>
<url-pattern>/logout</url-pattern>
</servlet-mapping>
<filter>
<filter-name>loginFilter</filter-name>
<filter-class>com.java1234.filter.LoginFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>loginFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>
com.java1234.listener.SessionAttributeListener
</listener-class>
</listener>
</web-app>
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四月 06, 2020 7:58:08 下午 org.apache.catalina.core.AprLifecycleListener init資訊: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: D:\eclipse-oxygen\jdk8\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files\Microsoft MPI\Bin\;C:\Program Files (x86)\Common Files\Intel\Shared Files\cpp\bin\Intel64;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files (x86)\Common Files\Thunder Network\KanKan\Codecs;C:\Program Files\Git\cmd;C:\Program Files\nodejs\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\150\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\150\DTS\Binn\;";C:\Program Files\Java\jdk-13.0.2\bin;C:\Program Files\Java\jdk-13.0.2\jre\bin";"%CATALINA_HOME%\lib;%CATALINA_HOME%\bin";C:\Users\acer\AppData\Roaming\npm;C:\Users\acer\AppData\Local\Programs\Python\Python37;D:\Ashort;D:\Bandizip\;C:\Users\acer\AppData\Local\Programs\Python\Python37\Scripts;D:\Microsoft VS Code\bin;C:\Users\acer\AppData\Roaming\Python\Python37\Scripts;.
四月 06, 2020 7:58:09 下午 org.apache.tomcat.util.digester.SetPropertiesRule begin
警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:servlettest' did not find a matching property.
四月 06, 2020 7:58:10 下午 org.apache.coyote.AbstractProtocol init
資訊: Initializing ProtocolHandler ["http-bio-8080"]
四月 06, 2020 7:58:10 下午 org.apache.coyote.AbstractProtocol init
資訊: Initializing ProtocolHandler ["ajp-bio-8009"]
四月 06, 2020 7:58:10 下午 org.apache.catalina.startup.Catalina load
資訊: Initialization processed in 1841 ms
四月 06, 2020 7:58:10 下午 org.apache.catalina.core.StandardService startInternal
資訊: Starting service Catalina
四月 06, 2020 7:58:10 下午 org.apache.catalina.core.StandardEngine startInternal
資訊: Starting Servlet Engine: Apache Tomcat/7.0.34
四月 06, 2020 7:58:13 下午 org.apache.catalina.util.SessionIdGenerator createSecureRandom
資訊: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [1,033] milliseconds.
四月 06, 2020 7:58:15 下午 org.apache.catalina.core.StandardContext listenerStart
嚴重: Error configuring application listener of class com.java1234.listener.SessionAttributeListener
java.lang.ClassNotFoundException: com.java1234.listener.SessionAttributeListener
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:532)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:514)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:133)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4727)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
四月 06, 2020 7:58:15 下午 org.apache.catalina.core.StandardContext listenerStart
嚴重: Skipped installing application listeners due to previous error(s)
四月 06, 2020 7:58:15 下午 org.apache.catalina.core.StandardContext startInternal
嚴重: Error listenerStart
四月 06, 2020 7:58:15 下午 org.apache.catalina.core.StandardContext startInternal
嚴重: Context [/servlettest] startup failed due to previous errors
四月 06, 2020 7:58:15 下午 org.apache.coyote.AbstractProtocol start
資訊: Starting ProtocolHandler ["http-bio-8080"]
四月 06, 2020 7:58:15 下午 org.apache.coyote.AbstractProtocol start
資訊: Starting ProtocolHandler ["ajp-bio-8009"]
四月 06, 2020 7:58:15 下午 org.apache.catalina.startup.Catalina start
資訊: Server startup in 5685 ms
uj5u.com熱心網友回復：
你的專案夠老的。什么年代的專案了。轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/95999.html
標籤：Java EE
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