在Eclipse中配置Struts2

下面介绍在Eclipse中配置Struts2的过程:

一、下载Struts2,因为Struts2是开源的,百度或者google一下就可以找到下载地址。我下载的是struts-2.3.1.2版本 的,解压之后入下图:



apps目录:Struts2的范例

docs目录:Struts2的文档

lib目录:Struts2的类库

src目录:关于Struts2的一些资源

二、现在是利用apps中的范例实现一个helloworld的action,在apps目录下有几个war文件,如下图:



 

这几个文件可以用WinRAR打开,我用好压打开struts2-blank.war之后,如下图



 

在WEB-INF目录下打开classes目录,找到struts.xml文件,如下图



 

将struts.xml文件复制到Eclipse新建工程的src目录下,在我的工程中如下图:



 

三、如上面所示,在WEB-INF目录下打开lib目录,如下图:



 打开之后会有如上图的jar包,为保险起见,将所有的jar包复制到新建工程的lib目录下,在我的工程中如下图:



 

四、返回到WEB-INF目录下,找到web.xml文件并打开,打开之后会看到有如下代码:

Xml代码 复制代码 收藏代码
  1. <?xml version="1.0" encoding="UTF-8"?>  
  2. <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">  
  3.   
  4.     <display-name>Struts Blank</display-name>  
  5.   
  6.     <filter>  
  7.         <filter-name>struts2</filter-name>  
  8.         <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>  
  9.     </filter>  
  10.   
  11.     <filter-mapping>  
  12.         <filter-name>struts2</filter-name>  
  13.         <url-pattern>/*</url-pattern>  
  14.     </filter-mapping>  
  15.   
  16.     <welcome-file-list>  
  17.         <welcome-file>index.html</welcome-file>  
  18.     </welcome-file-list>  
  19.   
  20. </web-app>  
<?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>Struts Blank</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>index.html</welcome-file>
    </welcome-file-list>

</web-app>

 将其中<filter></filter>和<filter-mapping></filter-mapping>元素复制到Eclipse新建工程的web.xml文件中,我的web.xml文件如下所示:

Xml代码 复制代码 收藏代码
  1. <?xml version="1.0" encoding="UTF-8"?>  
  2. <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">  
  3.   <display-name>Structs0317</display-name>  
  4.   <welcome-file-list>  
  5.     <welcome-file>index.html</welcome-file>  
  6.     <welcome-file>index.htm</welcome-file>  
  7.     <welcome-file>index.jsp</welcome-file>  
  8.     <welcome-file>default.html</welcome-file>  
  9.     <welcome-file>default.htm</welcome-file>  
  10.     <welcome-file>default.jsp</welcome-file>  
  11.   </welcome-file-list>  
  12.    <filter>  
  13.         <filter-name>struts2</filter-name>  
  14.         <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>  
  15.     </filter>  
  16.   
  17.     <filter-mapping>  
  18.         <filter-name>struts2</filter-name>  
  19.         <url-pattern>/*</url-pattern>  
  20.     </filter-mapping>  
  21. </web-app>  
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>Structs0317</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>

 

五、在Eclipse中打开复制来的struts.xml文件,将文件中<struts>和</struts>之间的内容注释掉,并添加如下所示的代码:

Xml代码 复制代码 收藏代码
  1. <package name="default" namespace="/" extends="struts-default">  
  2.   
  3.         <action name="hello">  
  4.             <result>  
  5.                 /Hello.jsp   
  6.             </result>  
  7.         </action>  
  8.     </package>  
<package name="default" namespace="/" extends="struts-default">

        <action name="hello">
            <result>
                /Hello.jsp
            </result>
        </action>
    </package>

 

六、在Ecplise中新建一个Hello.jsp文件,在<body>标签之间写如下代码:

     

Java代码 复制代码 收藏代码
  1. Hello Struts2<br>  
Hello Struts2<br>

 

然后启动Tomcat服务器,在IE浏览器中输入http://localhost:8080/Structs0317会发现出现如下错误:

Java代码 复制代码 收藏代码
  1. There is no Action mapped for namespace [/] and action name [] associated with context path [/Structs0317]. - [unknown location]   
  2.     at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185)   
  3.     at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)   
  4.     at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)   
  5.     at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)   
  6.     at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:500)   
  7.     at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)   
  8.     at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)   
  9.     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)   
  10.     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)   
  11.     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)   
  12.     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)   
  13.     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)   
  14.     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)   
  15.     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)   
  16.     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)   
  17.     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)   
  18.     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)   
  19.     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)   
  20.     at java.lang.Thread.run(Unknown Source)  
There is no Action mapped for namespace [/] and action name [] associated with context path [/Structs0317]. - [unknown location]
	at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185)
	at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
	at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
	at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
	at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:500)
	at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Unknown Source)

 

其实正确的输入是http://localhost:8080/Structs0317/hello或者http://localhost:8080/Structs0317/hello.action  访问到的Hello.jsp如下图所示:



 

 

OK,至此所有的配置都配置好了,接下来就可以好好的去玩Struts2了。在这里还想再谈一点感受就是,遇到新的东西首先是先拿去用,等会用了在好好研究它的原理和细枝末节,就像别人给你一把枪一样,你不会一拿到枪就把它拆开来研究它的内部构造,而是直接拿去用,会用了,觉得这东西有意思了,再好好去研究的内部结构甚至是仿制出一把出来。这也是我以前所没有意识到的,希望今后改进,好好学习,天天向上。

 

posted @ 2012-07-12 16:13  无头咸鱼  阅读(20307)  评论(2编辑  收藏  举报