Hibernate简单登录例子

向右看齐 2022-05-19 12:34 238阅读 0赞

1、登录用户表loginusers：

![70][]

2、新建JavaWeb工程hibernateModel1，完成部署hibernate(可参照[hibernate部署][hibernate])，工程目录如下

![70 1][]

3、在WebRoot下新建login.jsp，编写登录页

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        
        <title>Hibernate login</title>
    
      </head>
      
      <body>
        <h3>User Login</h3>
        <form action="validate.jsp" method="post">
        	<label>Account:   </label>
        	<input type="text" name="userName"/><br>
        	<label>Password:</label>
        	<input type="password" name="password"/><br><br>
        	<input type="reset" value="reset"/>
        	<input type="submit" value="submit"/>
        </form>
      </body>
    </html>

4、在WebRoot下新建validate.jsp，编写验证页

<%@ page language="java" import="java.util.*,com.bean.Loginusers" pageEncoding="utf-8"%>
    <%@ page import="org.hibernate.*,com.tools.HibernateSessionFactory" %>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>  
        <title>hibernate validate.jsp</title>
      </head>
      
      <body>
        <%
        	request.setCharacterEncoding("utf-8");
        	String account=request.getParameter("userName");
        	String password=request.getParameter("password");
        	boolean flag=false;
        	Loginusers user=null; //创建登录用户
        	user=(Loginusers)session.getAttribute("user");
        	
        	if(user==null){      //判断是否是第一次登录          
        		String hql="from Loginusers u where u.userName=? and u.password=?";
        		Session hsession=HibernateSessionFactory.getSession();
        		Query query=hsession.createQuery(hql);
        		query.setParameter(0,account);
        		query.setParameter(1,password);
        		List list=query.list();
        		if(list!=null){
        			Iterator it=list.iterator();
        			while(it.hasNext()){
        			   	user=(Loginusers)it.next();
        			   	session.setAttribute("user",user);
        			   	flag=true;
        			}
        		}
        	}else{
        		flag=true;
        	}
        	if(flag)
    	    	response.sendRedirect("success.jsp");
    	    else
    	    	response.sendRedirect("error.jsp");
         %>
      </body>
    </html>

5、在WebRoot下新建success.jsp，编写验证成功页

<%@ page language="java" import="java.util.*" import="com.bean.Loginusers" pageEncoding="utf-8"%>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>    
        <title>My JSP 'success.jsp' starting page</title>
      </head>  
      <body>
      	<% 
      		Loginusers user=(Loginusers)session.getAttribute("user");
      		String uName=user.getUserName();
      	 %>
        <h2 style="text-align:center;margin:200xp auto">Welcome <%=uName %>,Login Success</h2>
      </body>
    </html>

6、在WebRoot下新建error.jsp，编写验证失败页

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>    
        <title>My JSP 'error.jsp' starting page</title>
      </head>
      
      <body>
        <h2 style="text-align:center;margin:100px auto">Login Error</h2>
      </body>
    </html>

7、保存所有启动Tomcat，浏览器测试

![70 2][]

![70 3][]

![70 4][]

![70 5][]

[70]: /images/20220519/df7028380cbd4c8b95dbc2fcccc0a16a.png
[hibernate]: https://blog.csdn.net/zero_130/article/details/81199344
[70 1]: /images/20220519/c9cbc3fe919f46f4a3c0ecefea3731d3.png
[70 2]: /images/20220519/e45c7794e3da4913bd88100021d7f345.png
[70 3]: /images/20220519/39b82728458e453faba741072d82e942.png
[70 4]: /images/20220519/dc979f62526445729465b759ad6d0c71.png
[70 5]: /images/20220519/149a65e8e0db42309c4209b38207d62b.png