Struts实现登陆

最近一直在研究struts看的书有点老，也许还没有DispatchAction这类。
不知道1.1版本里是否有使用到这个类。就先用Action这个类写一遍。
比如：现在你已经在login.jsp页面提交给Struts，或者index.jsp页面提交任何都行。
 配置文件：
web.xml

< servlet >
   < servlet-name > action </ servlet-name >
   < servlet-class > org.apache.struts.action.ActionServlet </ servlet-class >
  
   < init-param >
    < param-name > config </ param-name >
    < param-value > /WEB-INF/struts-config.xml </ param-value >
   </ init-param >
  
   < init-param >
    < param-name > debug </ param-name >
    < param-value > 2 </ param-value >
   </ init-param >
  
   < load-on-startup > 2 </ load-on-startup >
  </ servlet >
 
  < servlet-mapping >
   < servlet-name > action </ servlet-name >
   < url-pattern > *.do </ url-pattern >

</ servlet-mapping >

struts-config.xml配置

Code
<struts-config>
<form-beans>
     <form-bean name="LoginForm" type="web.form.loginForm"></form-bean>
</form-beans>

<action path="/Login" name="LoginForm" input="/error.jsp"
        scope="request" type="web.action.loginAction" validate="true">
     <forward name="login" path="/logon.jsp" />
</action>

</struts-config>

LoginForm类

package  web.form;

import  javax.servlet.http.HttpServletRequest;

import  org.apache.struts.action.ActionErrors;
import  org.apache.struts.action.ActionForm;
import  org.apache.struts.action.ActionMapping;
import  org.apache.struts.action.ActionMessage;

public   class  loginForm  extends  ActionForm {

     private  String username;
     private  String password;
     public  loginForm() {
         //  TODO Auto-generated constructor stub
    }
     public  String getUsername() {
         return  username;
    }
     public   void  setUsername(String username) {
         this .username  =  username;
    }
     public  String getPassword() {
         return  password;
    }
     public   void  setPassword(String password) {
         this .password  =  password;
    }
    
     public  ActionErrors validate(ActionMapping mapping,HttpServletRequest request){
        ActionErrors error  =   new  ActionErrors();
         if (username == null || username.equals( "" ) || username.length() < 1 )
        {
            error.add( " username " , new  ActionMessage( " error.username.reqired " ));
        }
         if (password == null || "" .equals(password) || password.length() < 1 )
        {
            error.add( " password " , new  ActionMessage( " error.password.reqired " ));
        }
         return  error;
    }
}

LoginAction类

ackage web.action;

import  java.io.IOException;

import  javax.servlet.ServletException;
import  javax.servlet.http.HttpServletRequest;
import  javax.servlet.http.HttpServletResponse;
import  javax.servlet.http.HttpSession;

import  org.apache.struts.action.Action;
import  org.apache.struts.action.ActionErrors;
import  org.apache.struts.action.ActionForm;
import  org.apache.struts.action.ActionForward;
import  org.apache.struts.action.ActionMapping;
import  org.apache.struts.action.ActionMessage;
import  org.apache.struts.action.ActionMessages;
import  org.apache.struts.actions.DispatchAction;

import  app.Constants;

import  com.UserDirectory;
import  com.UserDirectoryException;

import  web.form.loginForm;

public   class  loginAction  extends  DispatchAction {

     public  loginAction() {
         //  TODO Auto-generated constructor stub
    }

         public  ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response)  throws  IOException, ServletException {
        
        loginForm myform  =  (loginForm)form;
         if (myform == null )
        {
               return   new  ActionForward(mapping.getInput(), false );
        }
         boolean  istrue  =   false ;
         try
        {
             // 验证登陆业务逻辑
            istrue  =  isUserlogon(myform.getUsername(),myform.getPassword());
        }
         catch  (Exception e) {
            ActionErrors errors  =   new  ActionErrors();
            errors.add(ActionErrors.GLOBAL_MESSAGE, new  ActionMessage( " error.logon.connect " ));
            saveErrors(request, errors);
             return   new  ActionForward(mapping.getInput(), false );
        }

         if ( ! istrue)
        {
                       
            ActionErrors errors  =   new  ActionErrors();
              // 1.1以后没有ActionError类 使用ActionMessage
             // 1.0 errors.add(ActionError.GLOBAL_MESSAGE,new ActionError("."))
            errors.add(ActionMessages.GLOBAL_MESSAGE,  new  ActionMessage( " error.logon.invalid " ));
            saveErrors(request, errors);
             return   new  ActionForward(mapping.getInput());
        }
        
        HttpSession session  =  request.getSession( true );
        session.setAttribute(Constants.USER_KEY,myform);
         /*
               1.0时
             if(servlet.getDebug()>=Constants.DEBUG)
          */
         if (Integer.parseInt(servlet.getInitParameter( " debug " )) >= Constants.DEBUG)
        {
            StringBuffer msg  =   new  StringBuffer( " LogonUser :' " );
            msg.append(myform.getUsername());
            msg.append( " 'logged on in session " );
            msg.append(session.getId());
            servlet.log(msg.toString());
        }
         return  mapping.findForward(Constants.SUCESS);
    }
}