hibernate（增删改查）

1、需要先创建学生实体：

package pers.zhb.domain;
public class Student {
    private int studentno;
    private String sname;
    private String sex;
    private String birthday;
    private String classno;
    private float point;
    private String phone;
    private String email;

    @Override
    public String toString() {
        return "Student{" +
                "studentno=\'" + studentno + \'\\'\' +
                ", sname=\'" + sname + \'\\'\' +
                ", sex=\'" + sex + \'\\'\' +
                ", birthday=\'" + birthday + \'\\'\' +
                ", classno=\'" + classno + \'\\'\' +
                ", point=" + point +
                ", phone=\'" + phone + \'\\'\' +
                ", email=\'" + email + \'\\'\' +
                \'}\';
    }

    public int getStudentno() {
        return studentno;
    }

    public void setStudentno(int studentno) {
        this.studentno = studentno;
    }

    public String getSname() {
        return sname;
    }

    public void setSname(String sname) {
        this.sname = sname;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getBirthday() {
        return birthday;
    }

    public void setBirthday(String birthday) {
        this.birthday = birthday;
    }

    public String getClassno() {
        return classno;
    }

    public void setClassno(String classno) {
        this.classno = classno;
    }

    public float getPoint() {
        return point;
    }

    public void setPoint(float point) {
        this.point = point;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }
}

2、学生实体与学生表的映射文件（Student.hbm.xml）：

<?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 package="pers.zhb.domain">
    <class name="Student" table="student">
        <id name="studentno" column="studentno">
            <generator class="native"></generator>
        </id>
        <property name="birthday" column="birthday"></property>
        <property name="classno" column="classno"></property>
        <property name="email" column="email"></property>
        <property name="phone" column="phone"></property>
        <property name="sex" column="sex"></property>
        <property name="sname" column="sname"></property>
        <property name="point" column="point"></property>
    </class>
</hibernate-mapping>

3、主配置文件（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">
<hibernate-configuration>
    <!--配置数据库信息-必须的-->
    <session-factory>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/stu_mangement</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.connection.password">root</property>
        <!--配置hibernate信息-可选的-->
        <property name="hibernate.show_sql">true</property><!--输出底层sql语句-->
        <property name="hibernate.format_sql">true</property><!--格式化输出sql语句-->
        <property name="hibernate.hbm2ddl.auto">create</property><!--hibernate帮助创建表，如果已经有表更新表，
        如果没有则创建新表-->
        <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
        <!--配置数据库的方言，让hibernate识别框架自己的特有语句-->
        <!--把映射文件放到核心配置文件-->
        <mapping resource="pers/zhb/domain/Student.hbm.xml"/><!--都在src目录下-->
    </session-factory>
</hibernate-configuration>

4、添加学生信息：

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import pers.zhb.domain.Student;
class HinernateTest{
    public static void testAdd()  {
        //(1)加载hibernate核心配置文件
        //src目录下的配置文件名称是固定的：hibernate.cfg.xml
        Configuration configuration= new Configuration();
        configuration.configure();
        //(2)读取hibernate核心配置文件的内容，创建sessionFactory对象，根据映射关系创建相应的表
        SessionFactory sessionFactory=configuration.buildSessionFactory();
        //（3）利用sessionFactory对象创建session对象
        //类似于创建连接
        Session session=sessionFactory.openSession();
        //(4)开启事务
        Transaction transaction=session.beginTransaction();
        //(5)具体操作
        Student student=new Student();
        student.setSname("zzzz");
        student.setSex("男");
        student.setBirthday("2019-11-11");
        student.setClassno("201911");
        student.setPoint(111);
        student.setPhone("1873496511");
        student.setEmail("20171514@qq.com");
        session.save(student);
        //(6)提交事务
        transaction.commit();
        //（7）关闭资源
        session.close();
        sessionFactory.close();
    }
    public static  void main(String []args){
        HinernateTest hinernateTest=new HinernateTest();
        hinernateTest.testAdd();
    }
}

 获取学生对象，并对该对象设置值。

 5、查询学生信息（根据主键查询）：

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import pers.zhb.domain.Student;
public class HiberateSel {
    public static void testSel() {
        Configuration configuration = new Configuration();
        configuration.configure();
        SessionFactory sessionFactory = configuration.buildSessionFactory();
        Session session = sessionFactory.openSession();
        Transaction transaction = session.beginTransaction();
        Student student=session.get(Student.class,824113307);
        System.out.println(student);
        transaction.commit();
        session.close();
        sessionFactory.close();
    }
    public static  void main(String []args){
        HiberateSel hinernateSel=new HiberateSel();
        hinernateSel.testSel();
    }
}

即直接获取学生对象。

  6、修改学生信息：

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import pers.zhb.domain.Student;
public class HibernateUpdate {
    public static void testUpdate() {
        Configuration configuration = new Configuration();
        configuration.configure();
        SessionFactory sessionFactory = configuration.buildSessionFactory();
        Session session = sessionFactory.openSession();
        Transaction transaction = session.beginTransaction();
        //获得要修改的对象
        Student student=session.get(Student.class,824113307);
        student.setEmail("201715@qq.com");
        student.setClassno("1234567");
        student.setPhone("18739496622");
        student.setBirthday("2019-11-11");
        student.setSex("女");
        student.setSname("tom");
        student.setPoint(666);

        transaction.commit();
        session.close();
        sessionFactory.close();

    }
    public static  void main(String []args){
        HibernateUpdate hibernateUpdate=new HibernateUpdate();
        hibernateUpdate.testUpdate();
    }
}

需要先通过主键获取要修改的学生对象，然后对相应的学生属性进行修改。

 

 7、删除学生：

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import pers.zhb.domain.Student;
public class HibernateDel{
    public static void testDel() {
        Configuration configuration = new Configuration();
        configuration.configure();
        SessionFactory sessionFactory = configuration.buildSessionFactory();
        Session session = sessionFactory.openSession();
        Transaction transaction = session.beginTransaction();
        //获得要修改的对象
        Student student=session.get(Student.class,824113307);
        session.delete(student);
        transaction.commit();
        session.close();
        sessionFactory.close();
    }
    public static  void main(String []args){
        HibernateDel hibernateDel=new HibernateDel();
        hibernateDel.testDel();
    }
}

 

 通过主键查找到学生对象，调用函数删除该学生。