Struts small project combat one

a need

On the successful login page, the name of the person who has successfully logged in is displayed

 

Two options

1 Implementation method

Implemented through the Request object

2 Implementation code

2.1  LoginAction

package com.cakin.actions;

//This is an action (representing the team leader, which needs to inherit Action)

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import com.cakin.forms.UserForm;

public class LoginAction extends Action {

    //We need to rewrite a method: execute will be called automatically, somewhat similar to the service method of servlet.

    @Override

    public ActionForward execute(ActionMapping mapping, ActionForm form,

            HttpServletRequest request, HttpServletResponse response)

            throws Exception {

            // Convert the form to the corresponding UserForm object

        UserForm userForm=(UserForm)form;

        // simple verification

        if("123".equals(userForm.getPassword())){

            //Store the name in the request object field

            request.setAttribute("username", userForm.getUsername());

            return mapping.findForward("ok");

        }

        else{

            return mapping.findForward("err");

        }

    }

}

 

2.2  wel.jsp

<%@ page language = "java" import = "java.util.*" pageEncoding = "utf-8" %>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+ "://" +request.getServerName()+ ":" +request.getServerPort()+path+ "/" ;

%>

 

<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

< html >

  < head >

    < base href = " <%= basePath %> " >

   

    < title > My JSP 'wel.jsp' starting page </ title >

   

         < meta http-equiv = "pragma" content = "no-cache" >

         < meta http-equiv = "cache-control" content = "no-cache" >

         < meta http-equiv = "expires" content = "0" >    

         < meta http-equiv = "keywords" content = "keyword1,keyword2,keyword3" >

         < meta http-equiv = "description" content = "This is my page" >

         <!--

        <link rel =" stylesheet " type="text/ css " href ="styles.css">

        -->

 

  </ head >

 

  < body >

    welcome <%= request.getAttribute( "username" ).toString() %> < br >

    < a href = "/strutslogin/" > 返回重新登录 </ a >

  </ body >

</ html >

 

三 测试结果