Struts-笔记-3

3. 用 struts 开发简单的登录示例程序

     3.1 建立 ActionForm

       开发 FORM

l          建一个类，继承 ActionForm

l          注册，修改配置文件 struts-config.xml

1 、当建立一个 Action 时，必须通知 struts ，即这种行为叫做注册。

 

创建一个 ActionForm ；

package com.ibm;

 

import org.apache.struts.action.ActionForm;

 

public class LoginForm extends ActionForm {

    private String username = null ;

    private String password = null ;

    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;

    }

   

}

 

l          写入 struts-config.xml

< form-beans >

       < form-bean name = "loginForm" type = "com.ibm.LoginForm" ></ form-bean >

    </ form-beans >

 

     3.2 建立 Action

l          建立一个类，继承 Action 覆盖 execute 方法

 

Com.ibm.LoginAction.java

public class LoginAction extends Action {

 

    @Override

    public ActionForward execute(ActionMapping mapping, ActionForm form,

           HttpServletRequest request, HttpServletResponse response)

           throws Exception {

          

       LoginForm loginForm = (LoginForm)form;

       if (loginForm.getUsername().equals( "ibm" )){

           return mapping.findForward( "loginSuccess" );

       } else {

           return mapping.findForward( "loginFailure" );

       }

    }

 

}

 

l          注册，修改配置文件 struts-config.xml

< action path = "/login" type = "com.ibm.LoginAction" name = "loginForm" >

           < forward name = "loginSuccess" path = "/LoginSuccess.jsp" ></ forward >

           < forward name = "loginFailure" path = "/LoginFailure.jsp" ></ forward >

       </ action >