Struts 2.3.1.2 出现404错误。

最新推荐文章于 2022-08-02 11:38:23 发布

转载最新推荐文章于 2022-08-02 11:38:23 发布 · 102 阅读

0 ·

CC 4.0 BY-SA版权

原文链接：https://my.oschina.net/jerikc/blog/53213

文章标签：

#java #web.xml

本文解决了一个Struts2框架配置导致的应用无法启动的问题。通过调整过滤器配置并引入FreeMarker依赖，成功解决了404错误及配置加载失败等问题。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

为什么80%的码农都做不了架构师？>>>

最近我在学习struts2,但是一直不能运行成功。我用了一个最简单的例子，如：

src/struts.xml

<?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>
	<include file="struts-default.xml" />
	<package name="bixy" namespace="/" extends="struts-default">
		<action name="hello" class="action.HelloStruts">
			<result name="suc">
				/hello.jsp
			</result>
			<result name="err">
				/error.jsp
			</result>
		</action>
	</package>
</struts>

src/action/HelloStruts.java

package action;

import com.opensymphony.xwork2.ActionSupport;  
public class HelloStruts extends ActionSupport {  
    private String meg="hello,world!";  
    public String getMeg() {  
        return meg;  
    }  
    public void setMeg(String meg) {  
        this.meg = meg;  
    }  
@Override  
    public String execute() throws Exception {  
        String f="";  
        if("hello".equals(meg))  
        {  
            f="suc";  
        }else{  
            f="err";  
        }  
        return f;  
    }  
}

WebContent/index.jsp

<%@ page language="java" pageEncoding="gbk"%>
<body>
	<form action="hello.action" method="post">
		name:<input name="meg" type="text"> <input type="submit"
			value="submit" />
	</form>
</body>

WebContent/error.jsp

<%@ page language="java" pageEncoding="gbk"%>
<body>输入内容有误！
</body>

WebContent/hello.jsp

<%@ page language="java" pageEncoding="gbk"%>
<%@ taglib prefix="s" uri="/struts-tags"%><!--引入的struts2标签-->
<body>
	输入的内容为：
	<s:property value="meg" />
</body>

WebContent/WEB-INF/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">

    <!--FilterDispatcher类在struts2-core.jar包中--> 
    <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> 
    <!--添加欢迎页面--> 
    <welcome-file-list> 
        <welcome-file>index.jsp</welcome-file> 
    </welcome-file-list> 
	
</web-app>

编译，部署之后，出现

HTTP Status 404

The discussion:

jeffsui 回答于 2012-04-12 08:06 (昨天(8:06))

2.3的filter又弄回去了？

<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>

这是2.1.8的filter配置你参考下

张培立回答于 2012-04-12 08:25 (昨天(8:25))

用上楼的试试

WebContent/index.jsp的路径有问题,action的路径不对

jeffsui 回答于 2012-04-12 08:37 (昨天(8:37))

１.查看部署时候的启动信息，有木有异常

２.查看你导入的ｊａｒ包是否完整

３.路径是否错误

王振威回答于 2012-04-12 08:47 (昨天(8:47))

我怀疑你的tomcat配置有问题，你先写个servlet试试看

I post the error:

2012-4-12 9:05:57 com.opensymphony.xwork2.util.logging.commons.CommonsLogger error
严重: Dispatcher initialization failed
Unable to load configuration. - bean - jar:file:/D:/test/TestStruts2/WebContent/WEB-INF/lib/struts2-core-2.3.1.2.jar!/struts-default.xml:54:89
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:69)
    at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:390)
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:436)
    at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
    at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:277)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258)
    at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4638)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5294)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Caused by: Unable to load bean: type: class:org.apache.struts2.views.freemarker.FreemarkerManager - bean - jar:file:/D:/test/TestStruts2/WebContent/WEB-INF/lib/struts2-core-2.3.1.2.jar!/struts-default.xml:54:89
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:235)
    at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:102)
    at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:180)
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
    ... 18 more
Caused by: java.lang.NoClassDefFoundError: freemarker/template/TemplateException
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
    at java.lang.Class.getDeclaredConstructors(Class.java:1836)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:225)
    ... 21 more
Caused by: java.lang.ClassNotFoundException: freemarker.template.TemplateException
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1701)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1546)
    ... 25 more
2012-4-12 9:05:57 org.apache.catalina.core.StandardContext startInternal
严重: Error filterStart

MarkYao 回答于 2012-04-12 09:19 (昨天(9:19))

问题出现在这里：你应该没有导入freemarker jar包吧

Caused by: java.lang.NoClassDefFoundError: freemarker/template/TemplateException

   at java.lang.Class.getDeclaredConstructors0(Native Method)
   at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
   at java.lang.Class.getDeclaredConstructors(Class.java:1836)
   at

jeffsui 回答于 2012-04-12 09:37 (昨天(9:37))

引用来自“MarkYao”的答案

问题出现在这里：你应该没有导入freemarker jar包吧

Caused by: java.lang.NoClassDefFoundError: freemarker/template/TemplateException

   at java.lang.Class.getDeclaredConstructors0(Native Method)
   at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
   at java.lang.Class.getDeclaredConstructors(Class.java:1836)
   at

恩，就是这个问题，freemarker.jar没导入.

At last ,i solve the problem besause of the freemarker.jar and filter setting.

<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>

转载于:https://my.oschina.net/jerikc/blog/53213