我在调用servlet作为欢迎文件时得到ClassNotFoundException: org.apache.struts2.dispatcher.FilterDispatcher。
以下是web.xml：
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>Welcome</servlet-name>
<servlet-class>java.Welcome</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Welcome</servlet-name>
<url-pattern>/Welcome</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>10</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>Welcome</welcome-file>
</welcome-file-list>
</web-app>
以下是我的servlet类：
package java;
import java.io.IOException;
import java.org.in.pesca.viewForms.LoginForm;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
@SuppressWarnings("serial")
public class Welcome extends HttpServlet{
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
HttpSession s = req.getSession();
if(!s.isNew()){
s.invalidate();
s = req.getSession(true);
}
LoginForm loginForm = new LoginForm();
Cookie[] cookies = req.getCookies();
if(cookies == null || cookies.length == 0){
for (Cookie cookie : cookies) {
if(cookie.getName().trim().equals("UserNameCookie")){
loginForm.setUserName(cookie.getValue().trim());
loginForm.setRememberMe(true);
} else if(cookie.getName().trim().equals("PasswordCookie")){
loginForm.setPassword(cookie.getValue().trim());
loginForm.setRememberPassword(true);
}
}
}
s.setAttribute("LoginForm", loginForm);
req.getRequestDispatcher("index.jsp").forward(req, resp);
}
}
下面是堆栈跟踪：
[#|2011-12-07T01:26:22.443+0530|SEVERE|glassfish3.1|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=62;_ThreadName=admin-thread-pool-4848(2);|WebModule[/SEAFOOD]PWC1270: Exception starting filter struts2
java.lang.InstantiationException
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:124)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4625)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:5316)
at com.sun.enterprise.web.WebModule.start(WebModule.java:500)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:917)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:901)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:755)
at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1980)
at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1630)
at com.sun.enterprise.web.WebApplication.start(WebApplication.java:100)
at org.glassfish.internal.data.EngineRef.start(EngineRef.java:130)
at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:269)
at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:286)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:461)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:370)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:355)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:370)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1067)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:96)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1247)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235)
at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:465)
at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:222)
at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:168)
at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:234)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.FilterDispatcher
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1518)
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1368)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:252)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:120)
... 40 more
|#]
[#|2011-12-07T01:26:22.459+0530|INFO|glassfish3.1|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=62;_ThreadName=admin-thread-pool-4848(2);|WEB0671: Loading application [SEAFOOD] at [/SEAFOOD]|#]
[#|2011-12-07T01:26:22.620+0530|INFO|glassfish3.1|javax.enterprise.system.tools.admin.org.glassfish.deployment.admin|_ThreadID=62;_ThreadName=admin-thread-pool-4848(2);|SEAFOOD was successfully deployed in 1,212 milliseconds.|#]
[#|2011-12-07T01:27:36.945+0530|INFO|glassfish3.1|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=37;_ThreadName=http-thread-pool-8080(4);|PWC1412: WebModule[null] ServletContext.log():PWC1409: Marking servlet Welcome as unavailable|#]
[#|2011-12-07T01:27:36.946+0530|SEVERE|glassfish3.1|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=37;_ThreadName=http-thread-pool-8080(4);|WebModule[/SEAFOOD]Error loading WebappClassLoader (delegate=true; repositories=WEB-INF/classes/) java.Welcome
java.lang.ClassNotFoundException: java.Welcome
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1518)
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1368)
at org.apache.catalina.core.StandardWrapper.loadServletClass(StandardWrapper.java:1394)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1258)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:1070)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:189)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:326)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:227)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:170)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:619)
|#]
我已经从Netbeans中黯然失色了。是否需要任何特定设置？