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我已经按照youtube上的关于 struts 的教程进行了操作，我完全遵循了每一步，但是我遇到了一个问题，我的程序没有将我引导到课堂上。我知道它不直接，因为它不显示信息System.out.println("from execute");

这是我的代码：

struts.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
    <package name="default" extends="struts-default">
        <action name="sample" class="com.struts.sample.action.SampleAction">
            <result name="success">/success.jsp</result>
            <result name="error">/error.jsp</result>
        </action>
    </package>    
</struts>

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" 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">
  <display-name>Struts2Example</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>

    <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>

SampleAction.java：

package com.struts.sample.action;

public class SampleAction {

    public String execute(){

        System.out.println("from execute");
        return "success";
    }

}

success.jsp：

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
success
</body>
</html>

我得到这个输出：

HTTP Status 404 - There is no Action mapped for namespace [/] and action name [getTutorial] associated with context path [/Struts2Example].

类型状态报告：

message There is no Action mapped for namespace [/] and action name [getTutorial] associated with context path [/Struts2Example].

description The requested resource is not available.

这是我的控制台：

Dec 13, 2013 11:40:46 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre7\bin;C:\windows\Sun\Java\bin;C:\windows\system32;C:\windows;C:\Program Files\Broadcom\Broadcom 802.11 Network Adapter\Driver;;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Intel\OpenCL SDK\2.0\bin\x86;C:\Program Files (x86)\Intel\OpenCL SDK\2.0\bin\x64;C:\Program Files\Lenovo\Bluetooth Software\;C:\Program Files\Lenovo\Bluetooth Software\syswow64;C:\Program Files\Lenovo Fingerprint Reader\;C:\Program Files\Lenovo Fingerprint Reader\x86\;C:\ProgramData\Lenovo\ReadyApps;C:\Program Files\TortoiseSVN\bin;.
Dec 13, 2013 11:40:47 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Struts2Example' did not find a matching property.
Dec 13, 2013 11:40:47 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Dec 13, 2013 11:40:47 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
Dec 13, 2013 11:40:47 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 733 ms
Dec 13, 2013 11:40:47 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Dec 13, 2013 11:40:47 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.42
log4j:WARN No appenders could be found for logger (com.opensymphony.xwork2.util.fs.DefaultFileManagerFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Dec 13, 2013 11:40:48 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Dec 13, 2013 11:40:48 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Dec 13, 2013 11:40:48 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 1711 ms

因此，控制台中应该有类似“from execute”之类的东西，System.out.println("from execute");但它不在课堂上，我不知道如何调试它了。 在此处输入图像描述

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2 回答 2

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你WEB-INF/class应该重命名为WEB-INF/classes. 在包资源管理器中右键单击文件夹名称并选择重命名或重构/重命名。如果这不起作用，请打开资源透视图并重命名文件夹名称。之后清理并重建并重新部署项目。

于 2013-12-13T05:40:16.483 回答
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我所做的是删除 WEB-INF/lib 中保存的 jar 我认为我的问题是因为我有一个来自教程方式的双 jar，另一个是因为我在上述文件夹中粘贴了同一个 jar。我有多余的 jar导致我的问题，所以如果你做了同样的删除保存的 jar 并重新运行程序，它肯定会工作

于 2013-12-17T05:22:38.293 回答