hibernate 配置

1.配置 hibernate.cfg.xml   在src裏面

<?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://localhost:3306/test</property>
        <property name="connection.username">root</property>
        <property name="connection.password">mysql</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">2</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <property name="hbm2ddl.auto">update</property>
        <mapping resource="ls/student/pojo/Student.hbm.xml" />
        <mapping resource="ls/teacher/pojo/Teacher.hbm.xml" />
    </session-factory>
</hibernate-configuration>

 2.配置pojo裏面Teacher類的 Teacher.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 package="ls.teacher.pojo">
    <class name="ls.teacher.pojo.Teacher" table="Teacher">
        <id name="userid" column="userid" type="string" >
            <generator class="assigned"/>
        </id>
        <property name="name" column="name" type="string"></property>
        <property name="password" column="password" type="string"></property>
        <property name="age" column="age" type="string"></property>
    </class>
</hibernate-mapping>

 

3.數據操作 增刪改查

package ls.teacher.dao;

import java.util.List;

import ls.teacher.pojo.Teacher;

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

public class TeacherDao {
    private static  Teacher teacher = null;
    /**
     * 添加老師
     * @param password
     * @return
     */
    public Teacher addTeacher(String userid,String name,String password,String age){
        Configuration cfg =  new  Configuration().addResource("hibernate.cfg.xml");//初始化configuration配置文件
        SessionFactory sf = cfg.configure().buildSessionFactory();//建一個SessionFactory
        Session session =  sf.openSession();//打開Session
        Transaction transaction = session.beginTransaction();//開始一個事物
        try {
            teacher = new Teacher();
            teacher.setUserid(userid);
            teacher.setName(name);
            teacher.setPassword(password);
            teacher.setAge(age);
            session.save(teacher);
            transaction.commit();
        } catch (Exception e) {
            // TODO: handle exception
            transaction.rollback();
        }
        return teacher;
    }

    /**
     * 通過id查詢老師信息
     * @param userid
     * @return Teacher
     */
    public Teacher selectTeacher(String userid){
        Configuration cfg =  new  Configuration().addResource("hibernate.cfg.xml");//初始化configuration配置文件
        SessionFactory sf = cfg.configure().buildSessionFactory();//建一個SessionFactory
        Session session =  sf.openSession();//打開Session
        Transaction transaction = session.beginTransaction();//開始一個事物
        String hql = "from Teacher teacher where teacher.userid=?";
        List<Teacher> list = null;
            try {
                list = session.createQuery(hql).setString(0, userid).list();
                System.out.println("pp:"+list.get(0).getPassword());
                transaction.commit();
                teacher = list.get(0);
            } catch (Exception e) {
                // TODO: handle exception
                transaction.rollback();
            }finally{
                session.close();
            }
        return teacher;
    }

    /**
     * 更新老師密碼
     * @return
     */
    public boolean updateTeacher(String userid,String password){
        boolean flag = false;
        Configuration cfg = new Configuration().addResource("hibernate.cfg.xml");
        SessionFactory sf = cfg.configure().buildSessionFactory();
        Session session = sf.openSession();
        Transaction transaction = session.beginTransaction();
        String hql = "update Teacher teacher set teacher.password=? where teacher.userid=?";
        try {
            Query queryupdate = session.createQuery(hql).setString(0, password).setString(1, userid);
            queryupdate.executeUpdate();
            transaction.commit();
            flag = true;
        } catch (Exception e) {
            // TODO: handle exception
            transaction.rollback();
        }finally{
            session.close();
        }
        return flag;
    }

    /**
     * 刪除老師信息
     * @return
     */
    public boolean deleteTeacher(String userid) {
        boolean flag = false;
        Configuration cfg =  new  Configuration().addResource("hibernate.cfg.xml");
        SessionFactory sf = cfg.configure().buildSessionFactory();
        Session session =  sf.openSession();
        Transaction transaction = session.beginTransaction();
        String hql = "delete from Teacher teacher where teacher=?";
        try {
            Query querydelete = session.createQuery(hql).setString(0, userid);
            querydelete.executeUpdate();
            transaction.commit();
            flag = true;
        } catch (Exception e) {
            // TODO: handle exception
            session.close();
        }
        return  flag;
    }

}