Eclipse JavaEE struts2

cfig

http://struts.apache.org/2.2.3/docs/strutsxml-examples.html

 

struts.xml中添加：

1. <package name="struts2" extends="struts-default">
   
2.          <!-- action name="login" class="LoginAction" method="execute" -->
   
3.          <action name="login" class="LoginAction" method="execute">
   
4.                <result name="success">login_success.jsp</result>
   
5.                <result name="failure">login_fail.jsp</result>
   
6.                <result name="input">index.jsp</result>
   
7.          </action>
   
8. </package>

web.xml中增加struts2支持：（filter和filter-map)

1. <filter>
   
2.       <filter-name>struts2</filter-name>
   
3.       <filter-class>
   
4.           org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
   
5.       </filter-class>
   
6. </filter>
   
7. 
   
8. <filter-mapping>
   
9.       <filter-name>struts2</filter-name>
   
10.       <url-pattern>*.action</url-pattern>
    
11. </filter-mapping>
    
12. 
    
13. <filter-mapping>
    
14.     <filter-name>struts2</filter-name>
    
15.     <url-pattern>*.jsp</url-pattern>
    
16. </filter-mapping>

LoginAction.java中添加函数：

1. //login.jsp 中直接赋值给name和pwd
   
2.     private String name;
   
3.     private String pwd;
   
4. 
   
5.     //validate() 会先于execute()执行，struts2内置
   
6.     public void validate()
   
7.     {
   
8.         if(getName() == null || "".equals(getName().trim()))
   
9.         {
   
10.             this.addFieldError("name", "name is required");
    
11.         }
    
12.         if(getPwd() == null || "".equals(getPwd().trim()))
    
13.         {
    
14.             this.addFieldError("pwd", "pwd is required");
    
15.         }        
    
16.     }
    
17.     
    
18.     public String execute() throws Exception
    
19.     {
    
20.         LoginCheck check1 = new LoginCheck();
    
21. 
    
22.         if(check1.isLogin(getName(), getPwd()))
    
23.         {
    
24.             ActionContext.getContext().getSession().put("login", "true");
    
25.             return "success";
    
26.         }else
    
27.         {
    
28.             return "failure";
    
29.         }
    
30.     }

添加LoginCheck类：

1. public class LoginCheck {
   
2.     public boolean isLogin(String name, String pwd)
   
3.     {
   
4.         System.out.println(name);
   
5.         System.out.println(pwd);
   
6.         if("admin".equals(name) && "123456".equals(pwd)){
   
7.             return true;
   
8.         }else{
   
9.             return false;
   
10.         }
    
11.     }
    
12. }

使用struts2的tag：

<%@taglib prefix="s" uri="/struts-tags" %>

index.jsp的body：

1. <%-- 直接到达controller --%>
   
2.     <s:form action="login">
   
3.         <%-- name必须与class中的名字完全一致，struts会自动赋值 --%>
   
4.         <s:textfield name="name" label="用户名"></s:textfield>
   
5.         <s:password name="pwd" label="密码"></s:password>
   
6.         <s:submit value="登录"></s:submit>
   
7.     </s:form>

    

常见问题：

（1）警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to

'org.eclipse.jst.jee.server:p1' did not find a matching property

出现SetPropertiesRule警告的原因是因为Tomcat在server.xml的Context节点中不支持source属性

解决方法是在Server的配置界面中选中"Publish module contexts to separate XML files"选项。

（2）

The APR based Apache Tomcat Native library which allows optimal performance in production environments was not

found on the java.library.path:

Google后得知此问题是由于Apache 默认推荐使用ARP提升系统性能,所以在启动Tomcat时会去搜寻这个库,解决方法很简单去

http://www.apache.org/dist/tomcat/tomcat-connectors/native/ 下载最新的库(一般只需要下载tcnative-1.dll 就行了) 放入你JDK安装目录下的bin文件夹即

可...(比如我JDK的Bin文件夹在C:\Program Files\Java\jdk1.6.0_17\bin)
文章地址:http://tomcat.apache.org/tomcat-6.0-doc/apr.html

（3）找不到类：

Since Struts 2.1.3, use StrutsPrepareAndExecuteFilter instead or StrutsPrepareFilter and Strut***ecuteFilter if needing using the ActionContextCleanUp filter in addition to this one

org.apache.struts2.dispatcher.FilterDispatcher --->
---> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter

需要手动将struts2-blank.war中的lib拷贝到目标lib中。不能多拷。