Exception occurred during processing request

sign

一样的代码在朋友电脑上运行通过了但是我的电脑一直报错，求大神帮看下
报错如下

严重: Exception occurred during processing request: There is no Action mapped for namespace [/] and action name [CCC] associated with context path [/struts2_02_Login].
There is no Action mapped for namespace [/] and action name [CCC] associated with context path [/struts2_02_Login]. - [unknown location]
        at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185)
        at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
        at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
        at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
        at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:553)
        at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
        at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1524)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1480)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.base/java.lang.Thread.run(Thread.java:835)

代码如下：

package lesson2;

public class User {
        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;
        }

}

package lesson2;
import java.util.Map;
import org.apache.struts2.interceptor.SessionAware;
import com.opensymphony.xwork2.ActionSupport;

public class CCC extends ActionSupport implements SessionAware{


        private static final long serialVersionUID = 1L;
        private User user;
        private Map<String,Object> session;
        
        public String execute()
        {
                session.put("user", user);
                return SUCCESS;
        }

        @Override
        public void setSession(Map<String, Object> session) {
                // TODO Auto-generated method stub
                this.session = session;
        }
        public void setUser(User user)
        {
                this.user = user;
        }
        public User getUser()
        {
                return user;
        }

}

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
                请输入用户名和密码：
        <br>
        <form action="CCC.action" method="post">

        <p>
                用户名：
                <input type="text" name="user.username"/>
        </p>
        <p>
                密码：
                <input type="text" name="user.password"/>
        </p>
        <input type="submit" value="登陆"/>
        </form>

</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
        <p>
                您的用户名为：
                <s:property value="#session.user.username"/>
        </p>
        <p>
                您的密码为：
                <s:property value="#session.user.password"/>
        </p>
</body>
</html>

superbe

no Action mapped for namespace [/] and action name [CCC] associated with context path [/struts2_02_Login]
看这个提示，可能是struts.xml中Action映射没有配置好，你对比下这个文件。

sign

superbe 发表于 2019-9-28 15:27
no Action mapped for namespace [/] and action name [CCC] associated with context path [/struts2_02_L ...

这个代码如下

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
        "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
         <package name="login" namespace="" extends="struts-default">
         <action name="Login" class="lesson2.Login">
                        <result>/welcome.jsp</result>
                </action>
                        
                <action name="AAA" class="lesson2.AAA">
                        <result>/welcomeProperty.jsp</result>
                </action>
                
                <action name="BBB" class="lesson2.BBB">
                        <result>/welcomeModel.jsp</result>
                </action>
                
                <action name="CCC" class="lesson2.CCC">
                        <result>/welcomeSession.jsp</result>
                </action>
                
    </package>
</struts>

我是直接复制了前面运行成功了的BBB改成了CCC，感觉应该没写错，麻烦再帮我看看谢谢

superbe

访问使用的url对吗，在web.xml中 <welcome-file-list> 有没有加入/indexSession.jsp (按你的首页修改)

sign

superbe 发表于 2019-9-29 00:17
访问使用的url对吗，在web.xml中  有没有加入/indexSession.jsp (按你的首页修改)

没有欸，web.xml原本是这样的：

<?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>Struts</display-name>
   <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> 
  

  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
  </welcome-file-list>
  
</web-app>

我刚刚尝试加了/indexSession.jsp和把html改成jsp但是依旧不行

sign

superbe 发表于 2019-9-29 00:17
访问使用的url对吗，在web.xml中  有没有加入/indexSession.jsp (按你的首页修改)

我重装eclipse后把代码复制过去又可以正常运行了。。。可能是之前eclipse有问题，谢谢啦