Struts2+Tomcat报404错误
今天在学Struts2时，测试一下登陆验证功能，部署到Tomcat上出现404
就是在访问http://localhost:8080/Struts2Pro/login.jsp时，出现404
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
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_2_5.xsd">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping></web-app>
struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="struts2" extends="struts-default">
<action name="login" class="com.test.action.LoginAction">
<result name="input">login.jsp</result>
<result>/result.jsp</result>
<result name="failer">/login.jsp</result>
</action>
</package>
</struts>
LoginAction.java
package com.test.action;
import com.opensymphony.xwork2.ActionSupport;
public class loginAction extends ActionSupport {
private String username;
private String password;
public String getUsername()
{
return username;
}
public void setUsername(String username)
{
this.username = username;
}
public String getPassword()
{
return password;
}
public void setPassword(String password)
{
this.password = password;
}
@Override
public void validate() {
// TODO Auto-generated method stub
System.out.println("进入validate方法进行校验");
if(null==this.getUsername()|| "".equals(this.getUsername().trim()))
{
this.addFieldError("username", "请输入用户名");
}
if(null==this.getPassword()||"".equals(this.getPassword().trim()))
{
this.addFieldError("password", "请输入密码");
}
}
@Override
public String execute() throws Exception {
// TODO Auto-generated method stub
if("zy".equals(this.getUsername().trim())&&"123".equals(this.getPassword().trim()))
{
return "success";
}
else
{
this.addFieldError("username", "username or password error!!!!");
return "failer";
}
}
}
Tomcat的报错
严重: Exception starting filter struts2
Class: com.opensymphony.xwork2.spring.SpringObjectFactory
File: SpringObjectFactory.java
Method: getClassInstance
Line: 230 - com/opensymphony/xwork2/spring/SpringObjectFactory.java:230:-1
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:502)
at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57)
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4854)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5546)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.HostConfig.reload(HostConfig.java:1533)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1497)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1695)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:333)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1374)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1546)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1556)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1524)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:230)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyResultType(XmlConfigurationProvider.java:604)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addResultTypes(XmlConfigurationProvider.java:574)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:530)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:292)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:112)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:250)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:446)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:490)
... 19 more
2015-7-26 15:56:09 org.apache.catalina.core.StandardContext startInternal
严重: One or more Filters failed to start. Full details will be found in the appropriate container log file
2015-7-26 15:56:09 org.apache.catalina.core.StandardContext startInternal
严重: Context [/Struts2New] startup failed due to previous errors
404是找不到页面，是不是Action的路径配错了
错误信息帖出来，就是在访问http://localhost:8080/Struts2Pro/login.jsp时，出现404，你确定是否访问jsp页面时出错的？访问jsp应该不会出问题的，因为你的jsp放在了WebRoot下，可以直接访问的。
这个肯定是拦截器有问题，在Java类打个断点，看看是否有进去工作了！
TomCat正常启动了吗？我有时遇到配置文件不规范，导致404错误的情况
struts.xml少写一个namespace=“/”
应该是发布项目时就报错了，可以把那个错贴上来看下嘛？
你这个里面的类名是大写的L，而实际给的java文件中使用的是小写的，是你贴错了还是IDE中就是这样。检查下。
建议你先解决tomcat启动报错的问题，如果tomcat启动时就有错，把错误贴出来看看。