hibernate一个注册小例子

package com.briup.common;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

@SuppressWarnings("deprecation")
public class HibernateSessionFactory {
    private static SessionFactory factory;
    private static final ThreadLocal<Session> threadLocal=new ThreadLocal<Session>();
    private HibernateSessionFactory(){}
    static {
        Configuration config=new Configuration();
        config.configure();
        factory=config.buildSessionFactory();
    }
    public static Session getSession(){
        Session session=threadLocal.get();
        if(session==null){
            session=factory.openSession();
            threadLocal.set(session);
        }
        return session;
    }
}
create table student(
    id int(10) primary key,
    name varchar(20),
    age int(3),
    gender varchar(2),
    hobby varchar(20),
    course varchar(2),
    description varchar(200)
);
alter table student add password varchar(20) after name;
alter table student modify id int(10) auto_increment;
package com.briup.bean;

import java.io.Serializable;

// 编码，用户名，年龄，性别，爱好，学习方向，个人简介
public class Student implements Serializable{
    /**
     * 
     */
    private static final long serialVersionUID = -8169238824872484701L;
    private Long id;//这里使用包装类型，可以避免用户给你的值是null的时候发生错误
    private String username;
    private String password;
    private Integer age;
    private Character gender;
    private String hobby;
    private String course;
    private String description;
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public Student(Long id, String username,String password,Integer age, Character gender,
            String hobby, String course, String description) {
        super();
        this.id = id;
        this.username = username;
        this.age = age;
        this.gender = gender;
        this.hobby = hobby;
        this.course = course;
        this.description = description;
    }
    public Student() {
        super();
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    public Character getGender() {
        return gender;
    }
    public void setGender(Character gender) {
        this.gender = gender;
    }
    public String getHobby() {
        return hobby;
    }
    public void setHobby(String hobby) {
        this.hobby = hobby;
    }
    public String getCourse() {
        return course;
    }
    public void setCourse(String course) {
        this.course = course;
    }
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getPassword() {
        return password;
    }
    
}
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.briup.bean">
    <class name="Student" table="STUDENT">
        <id name="id" column="ID">
            <generator class="native" />
        </id>
        <property name="username"/>
        <property name="password"/>
        <property name="age"/>
        <property name="gender"/>
        <property name="hobby"/>
        <property name="course"/>
        <property name="description"/>
    </class>
</hibernate-mapping>
<?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">


<hibernate-configuration>

    <session-factory>

        <!-- Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://127.0.0.1:3306/briup</property>
        <property name="connection.username">guodaxia</property>
        <property name="connection.password">961012gz</property>

        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="show_sql">true</property>

        <mapping resource="com/briup/bean/Student.hbm.xml"/>

    </session-factory>

</hibernate-configuration>
package com.briup.dao;

import org.hibernate.Session;

import com.briup.bean.Student;

public interface IStudentDao {
    public Session getSession();
    public void addStudent(Student student);
    public Student getStudentByName(String name);
}
package com.briup.service;

import com.briup.bean.Student;

public interface IstudentService {
    public Student login(String name,String pwd);
    public void register(Student stu);
}
package com.briup.dao.impl;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;

import com.briup.bean.Student;
import com.briup.common.HibernateSessionFactory;
import com.briup.dao.IStudentDao;
@SuppressWarnings("unchecked")
public class StudentDaoImpl implements IStudentDao{

    public Session getSession() {
        return HibernateSessionFactory.getSession();
    }

    public void addStudent(Student student) {
        getSession().beginTransaction();
        try{
            getSession().save(student);
            getSession().getTransaction().commit();
        }catch(Exception e){
            getSession().getTransaction().rollback();
            e.printStackTrace();
        }
        
    }

    public Student getStudentByName(String name) {
        getSession().beginTransaction();
        try{
            String hql="from Student where name=?";
            Query query=getSession().createQuery(hql);
            query.setString(0, name);
            List<Student> list=query.list();
            getSession().getTransaction().commit();
            if(list.size()>0){
                return list.get(0);
            }
        }catch(Exception e){
            getSession().getTransaction().rollback();
            e.printStackTrace();
        }
        return null;
    }

}

package com.briup.service.impl;

import com.briup.bean.Student;
import com.briup.dao.IStudentDao;
import com.briup.dao.impl.StudentDaoImpl;
import com.briup.service.IstudentService;

public class StudentServiceImpl implements IstudentService{
    private IStudentDao stuDao;
    public StudentServiceImpl(StudentDaoImpl stuDao){
        this.stuDao=stuDao;
    }
    public Student login(String name, String pwd) {
        Student s=stuDao.getStudentByName(name);
        if(s==null)    return null;
        return s.getPassword().equals(pwd)?s:null;
    }

    public void register(Student stu) {
        stuDao.addStudent(stu);
    }
}
package com.briup.web;

import java.io.IOException;
import java.util.Arrays;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.briup.bean.Student;
import com.briup.dao.impl.StudentDaoImpl;
import com.briup.service.IstudentService;
import com.briup.service.impl.StudentServiceImpl;

public class RegistServlet extends HttpServlet{

    /**
     * 
     */
    private static final long serialVersionUID = 2226750325614186979L;
    
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        doPost(req, resp);
    }
    
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        req.setCharacterEncoding("UTF-8");
        resp.setCharacterEncoding("UTF-8");
        
        String username=req.getParameter("username");
        String password=req.getParameter("password");
        String arr[]=req.getParameterValues("hobby");
        String hobby=Arrays.toString(arr);
        
        Student stu=new Student();
        stu.setUsername(username);
        stu.setPassword(password);
        stu.setHobby(hobby);
        
        IstudentService service=new StudentServiceImpl(new StudentDaoImpl());
        service.register(stu);
        
        req.getRequestDispatcher("/success.html").forward(req, resp);
    }
}
<?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">
  <display-name></display-name>    
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
  <servlet>
      <servlet-name>RegistServlet</servlet-name>
      <servlet-class>com.briup.web.RegistServlet</servlet-class>
  </servlet>
  <servlet-mapping>
      <servlet-name>RegistServlet</servlet-name>
      <url-pattern>/regist</url-pattern>
  </servlet-mapping>
  
</web-app>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>regist.html</title>
    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->

  </head>
  
  <body>
    <form action="regist" method="get">
        <input type="text" name="username"><br/>
        <input type="password" name="password"><br/>
        <input type="checkbox" name="hobby" value="打篮球">打篮球
        <input type="checkbox" name="hobby" value="看小说">看小说
        <input type="checkbox" name="hobby" value="玩网游">玩网游
        <input type="submit" value="注册">
    </form>
  </body>
</html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>MyHtml.html</title>
    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->

  </head>
  
  <body>
  <center>  注册成功！</center><br/>
    <a href="javascript:history.go(-1);">返回登录页面</a>
  </body>
</html>

 这个代码中事务处理放错位置了，应该放在service的实现类中