近期学习web开发时,就遇到这个令人头疼的问题。

百度谷歌了N遍,最终在博客http://blog.csdn.net/liu578182160/article/details/17266879中找到了问题的根源。

开发环境:win7 32位旗舰版,jdk1.7_45,jre7,eclipse4.3.1 JavaEE版,tomcat 7.0.42,struts2.3.16.3

问题出如今web.xml配置

原web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="struts2Demo" 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"> <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>

改动后的web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
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_3_0.xsd">
<display-name></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>login.jsp</welcome-file>
</welcome-file-list>
</web-app>

关键的差别就在于web-app的version

(似乎不关这版本号问题,刚试了2.4的web-app,能够执行成功。)

可能这不是问题的关键,项目改动的地方还有

原login.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'login.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
--> </head> <body>
<form action="login.action" method="post"><!-- login就是struts.xml里的action的name --> 用户名<input type="text" name="username" /> <!-- username相应LoginAction的username通过set方法传入 --> 密码: <input type="password" name="password" /> <!-- password相应LoginAction的password通过set方法传入 -->
<input type="submit" name="Submit" value="Submit"/>
</form>
</body>
</html>

改动后的login.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags" %>
<!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=UTF-8">
<title><s:text name="loginPage"/></title>
</head>
<body> <s:form action="login">
<s:textfield name="username" key="user"/>
<s:textfield name="password" key="pass"/>
<s:submit key="login" value="Submit"/>
</s:form> </body>
</html>

There is no Action mapped for namespace [/] and action name [Login] associated with context path [/e的更多相关文章

  1. struts2中错误There is no Action mapped for namespace [/] and action name [] associated with context path

    1 There is no Action mapped for namespace [/] and action name [] associated with context path [/Stru ...

  2. Struts2中关于"There is no Action mapped for namespace / and action name"的总结

    今天在调试一个基础的Struts2框架小程序.总是提示"There is no Action mapped for namespace / and action name"的错误. ...

  3. 报错:HTTP Status 404 - There is no Action mapped for namespace [/] and action name [product-save] associated with context path [/20161101-struts2-2].

    运行:index.jsp---->input.jsp----->details.jsp,但是在input.jsp到details.jsp的时候报错误. 异常如下: 严重: Could no ...

  4. Struts2-tomcat报错:There is no Action mapped for namespace / and action

    HTTP Status 404 - There is no Action mapped for namespace / and action name first. type Status repor ...

  5. There is no Action mapped for namespace [/pages/action/student] and action name [findStudent]

    1.错误描写叙述 2014-7-13 2:38:54 org.apache.jasper.compiler.TldLocationsCache tldScanJar 信息: At least one ...

  6. There is no Action mapped for namespace / and action name UserAction

    果断收藏了,说的非常具体.刚開始学习的人常常遇到的问题. There is no Action mapped for namespace / and action name UserAction 在网 ...

  7. eclipse中配置struts2出现There is no Action mapped for namespace [/] and action name [Login] associated wi

    下午在eclipse中配置struts2时报: There is no Action mapped for namespace [/] and action name [Login] associat ...

  8. eclipse使用SSH框架出现There is no Action mapped for namespace [/] and action name [] associated with context path错误

    eclipse使用SSH框架出现There is no Action mapped for namespace [/] and action name [] associated with conte ...

  9. struts 2.5 There is no Action mapped for namespace [/] and action name [user_find] associated with context path [/struts2_crm].

    遇到了这个错误. There is no Action mapped for namespace [/] and action name [user_find] associated with con ...

  10. Could not find action or result: There is no Action mapped for namespace [/] and action name [GetG

    Could not find action or result: /car/GetGpsDataAction  There is no Action mapped for namespace [/] ...

随机推荐

  1. 20165301 2017-2018-2 《Java程序设计》第六周学习总结

    20165301 2017-2018-2 <Java程序设计>第六周学习总结 教材学习内容总结 第七章:常用实类 String类 构造String对象 常量对象 String对象 Stri ...

  2. beego学习笔记(4):开发文档阅读(4)

    beego.Run() 这个运行后, 1)解析配置文件,也就是conf目录下的. 2)判断是否开启session,并作相应的工作 3)执行用户的hookfunc. 4)是否编译模板 5)是否开启文档功 ...

  3. Error: could not open `C:\Java\jre7\lib\i386\jvm.cfg

    打开eclipse时出现Error: could not open `C:\Program Files\Java\jre7\lib\i586\jvm.cfg’) 删除 c:\windows\syste ...

  4. Python全栈开发之8、装饰器详解

    一文让你彻底明白Python装饰器原理,从此面试工作再也不怕了.转载请注明出处http://www.cnblogs.com/Wxtrkbc/p/5486253.html 一.装饰器 装饰器可以使函数执 ...

  5. 一次压力测试Loadrunner经验分享

    一次压力测试Loadrunner经验分享 http://blog.csdn.net/lxlmj/article/category/553431 loadrunner测试socketstcpserver ...

  6. Lr中脚本的迭代次数和场景运行时间的关系

    Loadrunner中脚本的迭代次数和场景运行时间的关系 LR 的Vugen和controller中迭代是这样的: 当场景的持续时间为“运行至结束”时,以Vugen中设置的迭代次数为准 当场景的持续时 ...

  7. docker 解决network has active endpoints

    解决方式 使用 docker network disconnect -f {network} {endpoint-name},其中的 {endpoint-name} 可以使用命令 docker net ...

  8. 在 Ubuntu 系统安装 Redi laravel 5.2 引入第三方类

    composer 安装类依赖包 很受用 也很方便 但是要是一个有一定规模的公司技术团队 因为要照顾大局 还是引入类好些 下面是引入类的方法 1.首先在app目录下创建一个新的文件夹,命名Tools(可 ...

  9. Cordova - 禁用整个应用页面的上下拖动效果(防止拖动出现黑边)

    可在 config.xml 中进行如下设置:   <preference name="WebViewBounce" value="false" /> ...

  10. 洛谷P4151 [WC2011] 最大XOR和路径 [线性基,DFS]

    题目传送门 最大XOR和路径 格式难调,题面就不放了. 分析: 一道需要深刻理解线性基的题目. 好久没打过线性基的题了,一开始看到这题还是有点蒙逼的,想了几种方法全被否定了.还是看了大佬的题解才会做的 ...