struts 2開發登錄問題

我有幾個問題，如果有人可以幫助我用Struts 2解決這個問題。這是我的問題。當我運行我的簡單登錄應用程序時，我有這個錯誤：struts 2開發登錄問題

org.apache.jasper.JasperException：無法找到Struts調度程序。

這通常是由於使用沒有關聯過濾器的Struts標籤引起的。 Struts標籤只有在請求通過其servlet過濾器時纔可用，該過濾器初始化此標籤所需的Struts調度器。 - [未知地點]

日誌是這樣一個：

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)

文件樹是這個：

  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; 
} 

}

除了在src裏面我有struts.xml中：

<?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>

然後在web-info文件夾我有我有這個東西的web.xml：

<?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>

而在此之後，在我的WebContent有index.jsp和Login.jsp頁面，我有這樣的代碼：

<%@ 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>

而圖書館在WEB-INF內的lib文件夾爲：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。請問我在做什麼錯了？

來源

2012-07-06 zoit

如果您直接訪問jsp頁面，則不能在其中包含S2標籤 - 這些標籤需要S2特定的功能不會出現在未由S2處理的請求中。 – 2012-07-06 22:57:06

@Dave Newton''標籤仍然可以使用，不過！ – rees 2012-07-07 16:38:36

@rees如果在堆棧中沒有文本提供程序，那麼它必須做一些明確的事情。 – 2012-07-07 17:45:01

做這個變化

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

要

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

更改此

<s:form action="Login.action"> 要

<s:form namespace="/" action="Login">
下一頁變化

<s:submit method="execute"/>

要

<s:submit value="Login"/>

來源

2012-07-06 18:41:56

嗨，非常感謝，但它沒有工作:(，爲什麼？ – zoit 2012-07-06 23:11:45

我有這個問題，我404.jsp頁，這是我的解決方案：

我們不應該是我們e <s: 404.jsp中的標籤!!!

我不知道爲什麼，但是這解決了我的問題！

來源

2014-09-27 13:34:13

struts 2開發登錄問題

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