Struts2整合Hibernate3实现用户登录功能

所用技术:struts2 ,hibernate,jsp,mysql

本DEMO仅仅实现用户登录功能,采用MVC思想,自己也觉得相对是比较简单,比较容易理解数据流向的一个例子,通过整合这个过程,能够清晰的看出整个项目工程的数据流向和设计思想,是新手对于整合struts2和hibernate的最好的例子。

现将整合思想,过程,代码整理如下,如果新手看了还是有不明白或者需要源码,本人乐意效劳和分享源码。

JSP作为视图层V,显示登录,登录成功,失败页面;Struts2作为控制层C处理页面跳转;Hibernate用作数据模型M,它与前台程序的接口以DAO形式提供。

一.数据库设计:

1.创建数据库test   表名为:user

id  int  not null 自增

username   varchar(11) not null

password   varchar(11 not null)

二.M层开发:

2.Hibernate基本配置:

为Web项目添加Hibernate的相关jar包,hibernate.cfg.xml,并应用右击项目文件,myeclise,add hibernate …将建立sessionfacotry.这样就不用再自己去写了,实现了高效开发。下为hibernate.cfg.xml:

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration> <session-factory>
<property name="connection.username">root</property>
<property name="connection.url">jdbc:mysql:///test</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.password">123456</property>
<property name="connection.driver_class">org.gjt.mm.mysql.Driver</property> <!-- 在控制台显示SQL语句 -->
<property name="show_sql">true</property> <mapping resource="com/red/vo/User.hbm.xml" /> </session-factory> </hibernate-configuration>

3.生成POJO(Plain Old Java Object,简单的Java对象,通常也称为VO[ Value  Object ]对象,值对象)对象类 ,POJO是一种特殊的Java类,其中有一些属性及其对应的getter/setter方法,不允许有业务方法。将User.hbm.xml配置文件一定要放在和User实体bean相同的文件目录下。(附User.hbm.xml代码)

<?xml version="1.0" encoding='UTF-8'?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" > <hibernate-mapping package="com.red.vo"> <class name="User" table="user">
<id name="id" column="id" type="integer">
<generator class="identity"/>
</id> <property name="username" column="username" type="string" />
<property name="password" column="password" type="string" />
</class> </hibernate-mapping>

4.在src中另外建立两个包,分别放DAO接口IUserDAO及其实现类UserDAO。(附IUserDAO ,UserDAO  源码)

UserDAO.java

package com.red.dao.impl;

import java.util.List;

import javax.persistence.Query;

import com.red.dao.IUserDAO;
import com.red.factory.HibernateSessionFactory;
import com.red.vo.User; /**
* 实现接口
* @author Red
*
*/
public class UserDAO implements IUserDAO{
public User validateUser(String username,String password){
String sql="from User u where u.username=? and u.password=?";
org.hibernate.Query query=HibernateSessionFactory.getSession().createQuery(sql);
query.setParameter(0, username);
query.setParameter(1, password);
List users=query.list();
if(users.size()!=0){
User user=(User)users.get(0);
return user;
}
HibernateSessionFactory.closeSession();
return null;
}
}

IUserDAO.java

package com.red.dao;
import com.red.vo.User; /**
* 接口
* @author Red
*
*/
public interface IUserDAO { public User validateUser(String username,String password);
}

三.C层开发: 

5.加载,配置Struts2:

将jar包复制到lib目录下,并且将mysql的驱动包也放进去,修改web.xml的代码。(附web.xml代码)

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter> <filter-mapping><filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

6.实现Action:

在src中新建包action,创建类LoginAction类:(附代码LoginAction.java)

package com.red.action;

import com.opensymphony.xwork2.ActionSupport;
import com.red.dao.IUserDAO;
import com.red.dao.impl.UserDAO;
import com.red.vo.User; /**
* 用户登录action
* @author Red
*
*/
public class LoginAction extends ActionSupport{
private String username;
private String password;
//处理用户请求的execute方法
public String execute() throws Exception{
boolean validated=false;//验证成功标识
IUserDAO userDAO=new UserDAO();
User user=userDAO.validateUser(getUsername(),getPassword()); if(user!=null)
{
validated=true;
}
if(validated)
{
//验证成功返回字符串“success”
return SUCCESS;
}
else
{
//验证失败返回字符串“error”
return ERROR;
}
}
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;
} }

7.在struts.xml 中配置action:(附代码:struts.xml)

<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="struts" extends="struts-default">
<action name="login" class="com.red.action.LoginAction">
<result name="success">/welcome.jsp</result>
<result name="error">/error.jsp</result>
</action>
</package>
</struts>

四.V层开发:

就是写当个JSP文件。源码序列分别是:index.jsp;welcome.jsp;error.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>login</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>
<form action="login.action" method="post">
用户名:<input type="text" name="username"/><br/>
密码:<input type="password" name="password"/><br/>
<input type="submit" value="登 录">
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
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>welcome</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>
<s:property value="username"/>,您好!欢迎光临RED‘S HOME.
</body>
</html>
<%@ 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>error</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>
登录失败! <br>
</body>
</html>

欢迎大神拍砖,新手朋友:我们可以一起学习学习呃。

上一篇:ACdream 1063 平衡树


下一篇:这辆车已覆盖免费wifi