Hibernate 是一种 Java 语言下的对象关系映射解决方案。 它为面向对象的领域模型到传统的关系型数据库的映射，提供了一个使用方便的框架。那hibernate+servlet如何登陆注册?下面我们就给大家讲解一下hibernate+servlet登陆注册实现。
1.在MySQL里面新建一个数据库，里面新建一个表，加入相应的字段，新建一个Dynamic Web Project项目，整体的框架如图所示：
2.LoginRegisterInfo.java里面的代码：
package com.imooc.dao;
import java.util.List;
import javax.swing.JOptionPane;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.imooc.entity.User;
import com.imooc.util.HibernateSessionFactory;
public class LoginRegisterInfo
{
private Session session;
private Transaction transaction;
private Query query;
private HibernateSessionFactory getSession;
public LoginRegisterInfo()
{}
public String saveInfo(User user)
{
String mess = "error";
getSession = new HibernateSessionFactory();
session = HibernateSessionFactory.getSession();
try
{
transaction = session.beginTransaction();
session.save(user);
transaction.commit();
mess = "success";
return mess;
}
catch (Exception e)
{
message("RegisterInfo error:" + e);
e.printStackTrace();
return null;
}
}
public List < User > queryInfo(String type, Object value)
{
getSession = new HibernateSessionFactory();
session = HibernateSessionFactory.getSession();
try
{
String hqlsql = "from com.imooc.entity.User as u where u.username=?";
query = session.createQuery(hqlsql);
query.setParameter(0, value);
List < User > list = query.list();
transaction = session.beginTransaction();
transaction.commit();
return list;
}
catch (Exception e)
{
message("LoginRegisterInfo error:" + e);
e.printStackTrace();
return null;
}
}
private void message(String mess)
{
int type = JOptionPane.YES_NO_OPTION;
String title = "提示信息";
JOptionPane.showMessageDialog(null, mess, title, type);
}
}3.User.java里面的代码：
package com.imooc.entity;
import java.io.Serializable;
public class User implements Serializable
{
private Integer uid;
private String username;
private String password;
private String nickname;
private String email;
private Integer state;
private String code;
public User()
{}
public User(String username, String password, String nickname, String email, Integer state, String code)
{
this.username = username;
this.password = password;
this.nickname = nickname;
this.email = email;
this.state = state;
this.code = code;
}
public Integer getUid()
{
return this.uid;
}
public void setUid(Integer uid)
{
this.uid = uid;
}
public String getUsername()
{
return this.username;
}
public void setUsername(String username)
{
this.username = username;
}
public String getPassword()
{
return this.password;
}
public void setPassword(String password)
{
this.password = password;
}
public String getNickname()
{
return this.nickname;
}
public void setNickname(String nickname)
{
this.nickname = nickname;
}
public String getEmail()
{
return this.email;
}
public void setEmail(String email)
{
this.email = email;
}
public Integer getState()
{
return this.state;
}
public void setState(Integer state)
{
this.state = state;
}
public String getCode()
{
return this.code;
}
public void setCode(String code)
{
this.code = code;
}
}4.User.hbm.xml里面的代码：
<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping> <class name="com.imooc.entity.User" table="user" catalog="hibernate"> <id name="uid" type="java.lang.Integer"> <column name="uid" /> <generator class="increment" /> </id> <property name="username" type="java.lang.String"> <column name="username" length="30" /> </property> <property name="password" type="java.lang.String"> <column name="password" length="30" /> </property> <property name="nickname" type="java.lang.String"> <column name="nickname" length="30" /> </property> <property name="email" type="java.lang.String"> <column name="email" length="30" /> </property> <property name="state" type="java.lang.Integer"> <column name="state" /> </property> <property name="code" type="java.lang.String"> <column name="code" length="50" /> </property> </class> </hibernate-mapping>
5.LoginServlet.java代码：
package com.imooc.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.imooc.dao.LoginRegisterInfo;
import com.imooc.entity.User;
@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet
{
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
doPost(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
String username = request.getParameter("username");
String password = request.getParameter("password");
User user = new User();
LoginRegisterInfo info = new LoginRegisterInfo();
if (username == null || username.length() == 0)
{
out.print("<script language='javascript'>alert('用户名不能为空！');" +
"window.location.href='JSP/login.jsp';</script>");
}
else
{
List < User > list = info.queryInfo("username", username);
for (int i = 0; i < list.size(); i++)
{
user = list.get(i);
if (user.getUsername()
.equals(username))
{
if (user.getPassword()
.equals(password))
{
out.print("登录成功！");
return;
}
else
{
out.print("<script language='javascript'>alert('密码错误！');" +
"window.location.href='JSP/login.jsp';</script>");
}
}
}
out.print("<script language='javascript'>alert('用户名错误！');" +
"window.location.href='JSP/login.jsp';</script>");
}
}
}6.RegitServlet.java里面的代码;
package com.imooc.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.imooc.dao.LoginRegisterInfo;
import com.imooc.entity.User;
@WebServlet("/RegistServlet")
public class RegistServlet extends HttpServlet
{
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
doPost(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
String username = request.getParameter("username");
String password = request.getParameter("password");
String repassword = request.getParameter("repassword");
User user = new User();
LoginRegisterInfo info = new LoginRegisterInfo();
if (username == null || username.length() == 0)
{
out.print("<script language='javascript'>alert('用户名不能为空！');" +
"window.location.href='JSP/regist.jsp';</script>");
}
else
{
List < User > list = info.queryInfo("username", username);
for (int i = 0; i < list.size(); i++)
{
user = list.get(i);
if (user.getUsername()
.equals(username))
{
out.print("<script language='javascript'>alert('用户名已存在！');" +
"window.location.href='JSP/regist.jsp';</script>");
}
}
}
if (password == null || password.length() == 0)
{
out.print("<script language='javascript'>alert('密码不能为空！');" +
"window.location.href='JSP/regist.jsp';</script>");
}
else if (!password.equals(repassword))
{
out.print("<script language='javascript'>alert('两次输入的密码不一致！');" +
"window.location.href='JSP/regist.jsp';</script>");
}
user.setUsername(username);
user.setPassword(password);
info.saveInfo(user);
out.print("注册成功！");
}
}7.HibernateSessionFactory.java里面的代码：
package com.imooc.util;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
public class HibernateSessionFactory
{
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 StandardServiceRegistryBuilder()
.configure()
.build();
try
{
sessionFactory = new MetadataSources(serviceRegistry)
.buildMetadata()
.buildSessionFactory();
}
catch (Exception e)
{
StandardServiceRegistryBuilder.destroy(serviceRegistry);
e.printStackTrace();
}
}
catch (Exception e)
{
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
public HibernateSessionFactory()
{}
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;
}
public static void rebuildSessionFactory()
{
try
{
configuration.configure();
serviceRegistry = new StandardServiceRegistryBuilder()
.configure()
.build();
try
{
sessionFactory = new MetadataSources(serviceRegistry)
.buildMetadata()
.buildSessionFactory();
}
catch (Exception e)
{
StandardServiceRegistryBuilder.destroy(serviceRegistry);
e.printStackTrace();
}
}
catch (Exception e)
{
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
public static void closeSession() throws HibernateException
{
Session session = (Session) threadLocal.get();
threadLocal.set(null);
if (session != null)
{
session.close();
}
}
public static org.hibernate.SessionFactory getSessionFactory()
{
return sessionFactory;
}
public static Configuration getConfiguration()
{
return configuration;
}
}8.hibernate.cfg.xml里面的代码：
<?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="hbm2ddl.auto">update</property> <property name="myeclipse.connection.profile">MySQL</property> <property name="dialect"> org.hibernate.dialect.MySQLDialect </property> <property name="connection.password">root</property> <property name="connection.username">root</property> <property name="connection.url"> jdbc:mysql://localhost:3306/hibernate </property> <property name="connection.driver_class"> com.mysql.jdbc.Driver </property> <property name="show_sql">true</property> <property name="format_sql">true</property> <mapping resource="com/imooc/entity/User.hbm.xml" /> </session-factory> </hibernate-configuration>
9.login.jsp代码：
<%@ 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 'index.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"> </head> <body> <h1>登 录</h1> <hr> <form action="LoginServlet" method="post"> <table class="centertable"> <tr> <td class="td1">用 户 名：</td> <td class="td2"><input class="text1" type="text" name="username"/></td> </tr> <tr> <td class="td1">密 码：</td> <td class="td2"><input class="text1" type="password" name="password" /></td> </tr> <tr> <td colspan="2"> <input class="button" type="submit" value="登录" οnchange="checkpwd()"/> <input class="button" type="button" οnclick="javascript:history.back(-1);" value="返回"/> </td> </tr> </table> </form> </body> </html>
10.regist.java代码：
<%@ 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 'index.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"> </head> <body> <h1>注 册</h1> <hr> <form action="RegistServlet" method="post"> <table class="centertable"> <tr> <td class="td1">用 户 名：</td> <td class="td2"><input class="text1" type="text" name="username" /></td> </tr> <tr> <td class="td1">密 码：</td> <td class="td2"><input class="text1" type="password" name="password" /></td> </tr> <tr> <td class="td1">确认密码：</td> <td class="td2"><input class="text1" type="password" name="repassword" /></td> </tr> <tr> <td colspan="2"><input class="button" type="submit" value="注册" οnchange="checkpwd()" /> <input class="button" type="button" οnclick="javascript:history.back(-1);" value="返回" /></td> </tr> </table> </form> </body> </html>
在浏览器里面输入http://localhost:8080/Demo/JSP/regist.jsp运行，可以实现hibernate+servlet登录和注册功能。
好了，hibernate+servlet登录和注册功能按照以上的流程就可以实现了，Hibernate 是目前 Java 开发中最为流行的数据库持久层框架，使用它极大地缩短的手动处理 SQL 和 JDBC 上的开发时间哦!最后大家如果想要了解更多java架构师知识，敬请关注奇Q工具网。
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