一。Hibernate 开发流程

一.hibernate和mybatis都是orm产品
1.orm：object-realation-mapping对象关系映射

二.开发步骤
1.导入相关jar 包括hibernate和oracle的驱动

2.在src目录下完成核心的配置文件

　　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>
    <session-factory>
        <!--数据库方言 -->
        <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>
        <property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>
        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="connection.username">java</property>
        <property name="connection.password">java123</property>
        <property name="show_sql">true</property>
        <property name="format_sql">true</property>
　　　　　<!-- 所有的实体类映射文件要在此处全部注册 -->
        <mapping resource="com/pojo/Student.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

3.写一个实体类

Student.java

package com.pojo;

import java.util.Date;

public class Student {
    int studentId;
    String studentName;
    String studentSex;
    int studentAge;
    int classId;
    Date birthday;
    
    public Student() {
    }
    
    public Student(int studentId, String studentName, String studentSex, int studentAge, int classId, Date birthday) {
        this.studentId = studentId;
        this.studentName = studentName;
        this.studentSex = studentSex;
        this.studentAge = studentAge;
        this.classId = classId;
        this.birthday = birthday;
    }
    public int getStudentId() {
        return studentId;
    }
    public void setStudentId(int studentId) {
        this.studentId = studentId;
    }
    public String getStudentName() {
        return studentName;
    }
    public void setStudentName(String studentName) {
        this.studentName = studentName;
    }
    public String getStudentSex() {
        return studentSex;
    }
    public void setStudentSex(String studentSex) {
        this.studentSex = studentSex;
    }
    public int getStudentAge() {
        return studentAge;
    }
    public void setStudentAge(int studentAge) {
        this.studentAge = studentAge;
    }
    public int getClassId() {
        return classId;
    }
    public void setClassId(int classId) {
        this.classId = classId;
    }
    public Date getBirthday() {
        return birthday;
    }
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
    
}

4.给实体类写一个*.hbm.xml的映射配置文件

　　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>
    <class name="com.pojo.Student" table="student_info" schema="JAVA">
        <id name="studentId">
            <column name="student_id"></column>
            <!--主键的生成方式 -->
            <generator class="increment"></generator>
        </id>
        <property name="studentName" column="student_name" type="java.lang.String"></property>
        <property name="studentSex" column="student_sex" type="java.lang.String"></property>
        <property name="studentAge" column="student_age" type="java.lang.Integer"></property>
        <property name="classId" column="class_Id" type="java.lang.Integer"></property>
        <property name="birthday" column="birthday" type="java.util.Date"></property>
    </class>
</hibernate-mapping>

5.在hibernate.cfg.xml配置中加入映射文件的注册

　　见第2步
6.访问代码

Test.java

package com.dao;

import java.util.Date;
import java.util.List;

import org.hibernate.*;
import org.hibernate.cfg.*;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

import com.pojo.Student;

public class Test {

    public static void main(String[] args) {
        // 配置对象，用来获取核心配置文件的
        // 如果核心配置文件名是：hibernate.cfg.xml,并且该文件在src根目录下，configure（）可以不带参数
        Configuration configuration = new Configuration().configure();
        ServiceRegistry sr = new ServiceRegistryBuilder().applySettings(configuration.getProperties())
                .buildServiceRegistry();
        SessionFactory sf = configuration.buildSessionFactory(sr);
        Session session = sf.openSession();
        
        Student stu = new Student(11,"你好","2",22,1,new Date());
//        session.save(stu);
//        session.delete(stu);
        session.update(stu);
        session.beginTransaction().commit();//提交事务
        
        session.flush();
        session.close();
    }

}