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我有几个问题，如果有人可以帮助我用 Struts 2 解决这个问题，我会的。这就是我遇到的问题。当我运行我的简单登录应用程序时，我遇到了这个错误：

org.apache.jasper.JasperException：找不到 Struts 调度程序。

这通常是由于使用没有关联过滤器的 Struts 标签造成的。Struts 标记仅在请求通过其 servlet 过滤器时可用，该过滤器初始化此标记所需的 Struts 调度程序。- [未知位置]

日志是这样的：

Advertencia: StandardWrapperValve[jsp]: PWC1406: Servlet.service() for servlet jsp threw exception
The Struts dispatcher cannot be found.  This is usually caused by using Struts tags without the associated filter. Struts tags are only usable when the request has passed through its servlet filter, which initializes the Struts dispatcher needed for this tag. - [unknown location]
    at org.apache.struts2.views.jsp.TagUtils.getStack(TagUtils.java:60)
    at org.apache.struts2.views.jsp.StrutsBodyTagSupport.getStack(StrutsBodyTagSupport.java:44)
    at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:48)
    at org.apache.jsp.Login_jsp._jspx_meth_s_form_0(Login_jsp.java:99)
    at org.apache.jsp.Login_jsp._jspService(Login_jsp.java:72)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:403)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
    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 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:722)

文件树是这个：

            src(es.uniway.action.login as a package and inside this class:
LoginAction.java:

package com.uniway.action.login;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport{

@Override
public String execute() throws Exception {
// TODO Auto-generated method stub
return SUCCESS;
}

}

在 src 内部我也有 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>

<constant name="struts.enable.DynamicMethodInvocation" value="true" />
<constant name="struts.devMode" value="false" />

<package name="default" namespace="/" extends="struts-default">

<action name="Login" class="com.uniway.action.LoginAction">
<result name="input">/Login.jsp</result>
<result name="success" type="redirectAction">/index.jsp</result>
</action>


</package>


<!-- Add packages here -->

</struts>

然后在 web-info 文件夹中web.xml，我有这个东西：

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>cloud46</display-name>
<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>


 <welcome-file-list>
 <welcome-file>Login.jsp</welcome-file>

 </welcome-file-list>
 </web-app>

然后在 WebContent 我有 index.jsp 和 Login.jsp 我有这个代码：

<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>Sign On</title>
</head>

<body>
<s:form action="Login.action"> 
<s:textfield key="username"/>
<s:password key="password" />
<s:submit method="execute"/>
</s:form>  
</body>
</html>

WEB-INF 内的 lib 文件夹中的库为 : asm-3.3.jar, asm-commons-3.3.jar, asm-tree-3.3.jar, commons-fileupload-1.2.2.jar, commons-io-2.0.1.jar, commons-lang3-3.1.jar, freemarker-2.3.19.jar, javassist-3.11.0.GA.jar, ognl-3.0.5.jar , struts2-core-2.3.3.jar, xwork-core-2.3.3.jar. 请问，我做错了什么？

4

2 回答 2

1

做这个改变

<action name="Login" class="com.uniway.action.LoginAction">
<result name="input">/Login.jsp</result>
<result name="success" type="redirectAction">/index.jsp</result>
</action>

至

<action name="Login" class="com.uniway.action.LoginAction">
     <result name="input">/Login.jsp</result>
     <result name="success">/Login.jsp</result>
</action>

  1. 改变这个

    <s:form action="Login.action"> 至

    <s:form namespace="/" action="Login">

  2. 下一个变化

    <s:submit method="execute"/>

至

<s:submit value="Login"/>
于 2012-07-06T18:41:56.953 回答
0

我的 404.jsp 页面出现了这个问题，这是我的解决方案：

我们不应该<s:在 404.jsp 中使用标签！！！

我不知道为什么，但这解决了我的问题！

于 2014-09-27T13:34:13.913 回答