Myeclipse下的Struts 2 + Hibernate 的注册登录系统

最新推荐文章于 2016-11-30 22:18:00 发布

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最新推荐文章于 2016-11-30 22:18:00 发布

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分类专栏： SSH整合系列文章标签： myeclipse hibernate struts 2 数据库 web.xml

本文链接：https://blog.youkuaiyun.com/love_java_cc/article/details/46640647

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本文介绍了一个基于SH的登录与注册系统的实现过程，包括数据库设计、表创建、表单验证、登录与注册功能的实现以及相关代码示例。

文件目录结构如下：

数据库test的表info如下：

详细步骤如下：

1.新建一个web project，命名为ch14，然后右击ch14，选择倒数第二项 myeclipse,依次添加Struts2核心组件和Hibernate核心组件；然后把mysql的驱动文件包拷贝进/ch14/WebRoot/WEB-INF/lib 下

2.登录界面的jsp文件代码（login.jsp）

<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>


<html>
  <head>
    <base href="<%=basePath%>">
    
    <title><s:text name="基于SH的登录和注册系统"></s:text></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">
	
  </head>
 
  <body bgcolor="#CCCCFF">
  	<s:form action="login" method="post">
  	<br><br><br><br><br><br>
  		<table border="1" align="center" bgcolor="#AABBCCDD">
  			<tr><td><s:textfield name="userName" label="用户名字" size="16"/></td></tr>
  			<tr><td><s:password name="password" label="用户密码" size="18"/></td></tr>
  			<tr><td colspan="2" align="center"><s:submit value="登录"/></td></tr>
  			<tr><td colspan="2" align="center"><s:a href="http://localhost:8080/ch14/register.jsp">注册</s:a></td></tr>
  		</table>
  	</s:form>
    	
  </body>
</html>

3.注册页面代码(register.jsp)

<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>


<html>
  <head>
    <base href="<%=basePath%>">
    
    <title><s:text name="基于SH的登录和注册系统"></s:text></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">
  </head>
  
  <body bgcolor="#CCCCFF">
  	<s:form action="register" method="post">
  	<br><br><br><br><br><br>
  		<table border="1" align="center" bgcolor="#AABBCCDD">
  			<tr><td><s:textfield name="userName" label="用户名字" size="16"/></td></tr>
  			<tr><td><s:password name="password1" label="用户密码" size="18" /></td></tr>
  			<tr><td><s:password name="password2" label="再次输入密码" size="18" /></td></tr>
  			<tr><td colspan="2" align="center">
  				<input type="submit" value="提交"/>  
  				        
  				<input type="reset" value="清空"/>
  				</td>
  			</tr>
  			<tr><td colspan="2" align="center">
  				<s:a href="http://localhost:8080/ch14/login.jsp">登录</s:a></td></tr>
  		</s:form>  				
  		</table>	
  </body>
</html>

4.登录成功界面代码(success.jsp)

<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>


<html>
  <head>
    <base href="<%=basePath%>">
    
    <title><s:text name="基于SH的登录和注册系统"></s:text></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">
	
  </head>
  
  <body bgcolor="#CCCCFF">
  	<hr>
  	<table border="0" align="center" bgcolor="#AABBCCDD">
  		<tr><td>欢迎${userName },登录成功！</td></tr>
  	</table>
    	
  </body>
</html>

4.在src下新建4个包，分别为addHibernateFile、loginRegisterAction、loginRegisterDao、PO，其中addHibernateFile包是在导入Hibernate核心组件的时候建立的

5.addHibernateFile下的HibernateSessionFactory.java代码：

package addHibernateFile;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

/**
 * Configures and provides access to Hibernate sessions, tied to the
 * current thread of execution.  Follows the Thread Local Session
 * pattern, see {@link http://hibernate.org/42.html }.
 */
public class HibernateSessionFactory {

    /** 
     * Location of hibernate.cfg.xml file.
     * Location should be on the classpath as Hibernate uses  
     * #resourceAsStream style lookup for its configuration file. 
     * The default classpath location of the hibernate config file is 
     * in the default package. Use #setConfigFile() to update 
     * the location of the configuration file for the current session.   
     */
	private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
    private static org.hibernate.SessionFactory sessionFactory;
	
    private static Configuration configuration = new Configuration();
    private static ServiceRegistry serviceRegistry; 

	static {
    	try {
			configuration.configure();
			serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
			sessionFactory = configuration.buildSessionFactory(serviceRegistry);
		} catch (Exception e) {
			System.err.println("%%%% Error Creating SessionFactory %%%%");
			e.printStackTrace();
		}
    }
    public HibernateSessionFactory() {
    }
	
    public SessionFactory config(){
    	try{
    		Configuration configuration = new Configuration();
    		Configuration configure = configuration.configure("hibewnate.cfg.xml");
    		return configure.buildSessionFactory();
    	}catch(Exception e){
    		e.getMessage();
    		return null;
    	}
    }
	/**
     * Returns the ThreadLocal Session instance.  Lazy initialize
     * the <code>SessionFactory</code> if needed.
     *
     *  @return Session
     *  @throws HibernateException
     */
    public static Session getSession() throws HibernateException {
        Session session = (Session) threadLocal.get();

		if (session == null || !session.isOpen()) {
			if (sessionFactory == null) {
				rebuildSessionFactory();
			}
			session = (sessionFactory != null) ? sessionFactory.openSession()
					: null;
			threadLocal.set(session);
		}

        return session;
    }

	/**
     *  Rebuild hibernate session factory
     *
     */
	public static void rebuildSessionFactory() {
		try {
			configuration.configure();
			serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
			sessionFactory = configuration.buildSessionFactory(serviceRegistry);
		} catch (Exception e) {
			System.err.println("%%%% Error Creating SessionFactory %%%%");
			e.printStackTrace();
		}
	}

	/**
     *  Close the single hibernate session instance.
     *
     *  @throws HibernateException
     */
    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);

        if (session != null) {
            session.close();
        }
    }

	/**
     *  return session factory
     *
     */
	public static org.hibernate.SessionFactory getSessionFactory() {
		return sessionFactory;
	}
	/**
     *  return hibernate configuration
     *
     */
	public static Configuration getConfiguration() {
		return configuration;
	}

}

6.loginRegisterAction下的代码：

（1）LoginAction.java

package loginRegisterAction;

import java.util.List;
import loginRegisterDao.*;
import PO.UserInfoPO;
import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport {
	private String userName;
	private String password;
	private String message="error";
	private List list;
	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 void validate(){
		if(this.getUserName()==null || this.getUserName().length()==0){
			addFieldError("userName", "用户名不能为空!");
		}else{
			LoginRegisterInfo info = new LoginRegisterInfo();
			list = info.queryInfo("userName",this.getUserName());
			if(list.size()==0){
				addFieldError("userName", "该用户尚未注册！");
			}else{
				UserInfoPO ui = new UserInfoPO();
				int count = 0;
				for(int i=0; i<list.size(); i++){
					count++;
					ui = (UserInfoPO)list.get(i);
					if(this.getUserName().equals(ui.getUserName())){
						if(ui.getPassword().equals(this.getPassword())){
							message = SUCCESS;
						}else{
							addFieldError("password", "登录密码不正确!");
						}
					}
				}
			}
		}
	}
	public String execute(){
			return message;
	}

}

（2）RegisterAction.java

package loginRegisterAction;

import java.util.List;

import loginRegisterDao.LoginRegisterInfo;

import PO.UserInfoPO;

import com.opensymphony.xwork2.ActionSupport;

public class RegisterAction extends ActionSupport {
	private String userName;
	private String password1;
	private String password2;
	private String mess=ERROR;
	private List list;
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public String getPassword1() {
		return password1;
	}
	public void setPassword1(String password1) {
		this.password1 = password1;
	}
	public String getPassword2() {
		return password2;
	}
	public void setPassword2(String password2) {
		this.password2 = password2;
	}

	public void validate(){
		if(this.getUserName()==null || this.getUserName().length()==0){
			addFieldError("userName", "用户名不能为空!");
		}else{
			LoginRegisterInfo info = new LoginRegisterInfo();
			list = info.queryInfo("userName",this.getUserName());
			UserInfoPO ui = new UserInfoPO();
			for(int i=0; i<list.size(); i++){
				ui = (UserInfoPO)list.get(i);
				if(ui.getUserName().equals(this.getUserName())){
					addFieldError("userName", "用户名已存在!");
				}
			}
		}
		if(this.getPassword1()==null || this.getPassword1().length()==0){
			addFieldError("password1", "登录密码不允许为空！");
		}else if(this.getPassword2()==null || this.getPassword2().length()==0){
			addFieldError("password2", "重复密码不允许为空！");
		}else if(!this.getPassword1().equals(this.getPassword2())){
			addFieldError("password2", "两次密码不一致");
		}
	}
	
	public UserInfoPO userInfo(){
		UserInfoPO info = new UserInfoPO();
		info.setUserName(this.getUserName());
		info.setPassword(this.getPassword1());
		return info;
	}
	
	public String execute() throws Exception{
		LoginRegisterInfo lr = new LoginRegisterInfo();
		String ri = lr.saveInfo(userInfo());
		if(ri.equals("success")){
			mess = SUCCESS;
		}
		return mess;
	}
	

}

7.loginRegisterDao下的代码，LoginRegisterInfo.java

package loginRegisterDao;

import java.util.List;

import javax.swing.JOptionPane;
import PO.UserInfoPO;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import addHibernateFile.HibernateSessionFactory;

public class LoginRegisterInfo {
	private Session session;
	private Transaction transaction;
	private Query query;
	HibernateSessionFactory getSession;

	public LoginRegisterInfo() {

	}

	public String saveInfo(UserInfoPO info) {
		String mess = "error";
		getSession = new HibernateSessionFactory();
		session = getSession.getSession();
		try {
			transaction = session.beginTransaction();
			session.save(info);
			transaction.commit();
			mess = "success";
			return mess;
		} catch (Exception e) {
			message("RegisterInfo.error:" + e);
			e.printStackTrace();
			return null;
		}
	}

	public List queryInfo(String type, Object value) {
		getSession = new HibernateSessionFactory();
		session = getSession.getSession();
		transaction = session.beginTransaction();	/
		try {
			String hqlsql = "from UserInfoPO as u where u.userName='" + value
					+ "'";
			query = session.createQuery(hqlsql);
			// query.setParameter(0, value);
			List list = query.list();
			transaction.commit();
			return list;
		} catch (Exception e) {
			message("LoginRegisterInfo类中有异常，异常为：" + e);
			e.printStackTrace();
			return null;
		}
	}

	public void message(String mess) {
		int type = JOptionPane.YES_NO_OPTION;
		String title = "提示信息";
		JOptionPane.showMessageDialog(null, mess, title, type);
	}
}

8.PO下的代码：

（1）UserInfoPO.java

package PO;

public class UserInfoPO {
	private int id;
	private String userName;
	private String password;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	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;
	}
	

}

（2）UserInfoPO.hbm.xml

<?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>
 <class catalog="test" name="PO.UserInfoPO" table="info">
  <id name="userName" type="string">
   <column length="30" name="userName"/>
   <generator class="assigned"/>
  </id>
  <property generated="never" lazy="false" name="id" type="int">
   <column length="10" name="id" not-null="true"/>
  </property>
  <property generated="never" lazy="false" name="password" type="string">
   <column length="30" name="password" not-null="true"/>
  </property>
 </class>
</hibernate-mapping>

9.代码：hibernate.cfg.xml

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

    <session-factory>
        <property name="connection.url">jdbc:mysql://localhost:3306/test</property>
        <property name="connection.username">root</property>
        <property name="connection.password">1234</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
        <mapping resource="PO/UserInfoPO.hbm.xml"/>
    
    </session-factory>

</hibernate-configuration>

10.代码：struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
	<!--  <include file="example.xml"/>  -->
	<package name="default" extends="struts-default">
		<action name="register" class="loginRegisterAction.RegisterAction">
			<result name="success">/login.jsp</result>
			<result name="input">/register.jsp</result>
			<result name="error">/register.jsp</result>
		</action>
		<action name="login" class="loginRegisterAction.LoginAction">
			<result name="success">/success.jsp</result>
			<result name="input">/login.jsp</result>
			<result name="error">/login.jsp</result>
		</action>
	</package>
</struts>

11.代码：web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 
	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_3_0.xsd">
  <display-name></display-name>	
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>
  <filter>
  	<filter-name>struts2</filter-name>
  	<filter-class>
  		org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
  	</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>struts2</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping></web-app>

OK，全部代码贴完毕，接下来是运行流程：

首先进去的是注册页面:register.jsp，填写注册信息：用户名和密码，有一个validate验证，如下第一个图：

如果验证通过，就会跳转到登录界面，如上第二个图：

如果用户名和密码都正确，则登录成功，如上第三个图：

好了，上面是大概的流程，以下就是稍微详细一点的流程（本人菜鸟，正在学习中，大牛勿喷呀）：

首先进入register.jsp,提交之后会向tomcat服务器发送请求，服务器接收到请求之后，会查看web.xml配置文件，发现所有请求都交给struts2这个过滤器来处理；struts.xml就会根据发来的请求，找到与请求相应的action,发现是register这个action，就会去执行loginRegisterAction包里面的RegisterAction.java类，先执行validate()这个验证方法，然后根据类里面的execute返回的信息执行下一步；如果信息是success,则表示成功了，跳转到login.jsp这个页面；如果是error或者input，则表示失败了，重新回到register.jsp页面；成功跳转到login.jsp之后，填写用户名密码，提交，又会发送请求到tomcat服务器，紧接着服务器会查看web.xml文件，发现被拦截到了struts.xml中，继续查找struts.xml中的action，发现login这个action与之匹配，执行loginRegisterAction包里面的LoginAction.java类，先执行validate()这个验证方法，再执行execute()方法，根据返回的信息,如果成功success则跳转到success.jsp页面，登录成功，如果失败error则返回登录界面login.jsp