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

<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);
    }
}