（二）Hibernate4 CRUD 体验

所有的学习我们必须先搭建好hibernate的环境（1、导入对应的jar包，2、hibernate.cfg.xml，3、XXXX.hbm.xml）

第一节：HibernateUtil 封装

导入对应的hibernate的jar包和mysql的jar包

HibernateUtil.java

 1 package com.wishwzp.util;
 2 
 3 import org.hibernate.SessionFactory;
 4 import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
 5 import org.hibernate.cfg.Configuration;
 6 import org.hibernate.service.ServiceRegistry;
 7 
 8 /**
 9  * 
10  * hibernate封装
11  * @author wishwzp
12  *
13  */
14 public class HibernateUtil {
15     
16     private static final SessionFactory sessionFactory=buildSessionFactory();
17 
18     /**
19      * 绑定SessionFactory
20      * @return
21      */
22     private static SessionFactory buildSessionFactory(){
23         // 实例化配置文件
24         Configuration configuration=new Configuration().configure(); 
25         // 实例化服务登记
26         ServiceRegistry serviceRegistry=new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
27         //获取Session工厂
28         return configuration.buildSessionFactory(serviceRegistry);
29     }
30     
31     public static SessionFactory getSessionFactory(){
32         return sessionFactory;
33     }
34 }

第二节：XML 版CRUD 实现

导入对应的hibernate的jar包、mysql的jar包和添加每次都需要用到的HibernateUtil.java

Student.java

 1 package com.wishwzp.model;
 2 
 3 public class Student {
 4 
 5     private long id;
 6     private String name;
 7     
 8     public long getId() {
 9         return id;
10     }
11     public void setId(long id) {
12         this.id = id;
13     }
14     public String getName() {
15         return name;
16     }
17     public void setName(String name) {
18         this.name = name;
19     }
20     @Override
21     public String toString() {
22         return "Student [id=" + id + ", name=" + name + "]";
23     }
24     
25     
26 }

Student.hbm.xml

 1 <?xml version="1.0"?>
 2 <!DOCTYPE hibernate-mapping PUBLIC
 3         "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 4         "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
 5 
 6 <hibernate-mapping package="com.wishwzp.model">
 7 
 8     <class name="Student" table="t_student">
 9         <id name="id" column="stuId">
10             <generator class="native"></generator>
11         </id>
12         
13         <property name="name"></property>
14     </class>
15 
16 </hibernate-mapping>

hibernate.cfg.xml

 1 <?xml version='1.0' encoding='utf-8'?>
 2 <!DOCTYPE hibernate-configuration PUBLIC
 3         "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 4         "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
 5 
 6 <hibernate-configuration>
 7 
 8     <session-factory>
 9 
10         <!--数据库连接设置 -->
11         <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
12         <property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property>
13         <property name="connection.username">root</property>
14         <property name="connection.password">123456</property>
15 
16        
17         <!-- 方言 -->
18         <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>
19     
20         <!-- 控制台显示SQL -->
21         <property name="show_sql">true</property>
22 
23         <!-- 自动更新表结构 -->
24         <property name="hbm2ddl.auto">update</property>
25         
26         <!-- XML 版CRUD 实现 -->
27           <mapping resource="com/wishwzp/model/Student.hbm.xml"/>
28 
29 </hibernate-configuration>

StudentTest.java

  1 package com.wishwzp.service;
  2 
  3 import java.util.List;
  4 
  5 import org.hibernate.Query;
  6 import org.hibernate.Session;
  7 import org.hibernate.SessionFactory;
  8 
  9 import com.wishwzp.model.Student;
 10 import com.wishwzp.util.HibernateUtil;
 11 
 12 public class StudentTest {
 13     
 14     private SessionFactory sessionFactory=HibernateUtil.getSessionFactory();
 15     
 16     /**
 17      * 添加
 18      */
 19     private void add(){
 20         // 生成一个session
 21         Session session=sessionFactory.openSession();
 22         // 开启事务
 23         session.beginTransaction(); 
 24         
 25         Student s=new Student();
 26         s.setName("张三");
 27         session.save(s);
 28         
 29         // 提交事务
 30         session.getTransaction().commit();
 31         // 关闭session
 32         session.close();
 33     }
 34     
 35     /**
 36      * 删除
 37      */
 38     private void delete(){
 39         // 生成一个session
 40         Session session=sessionFactory.openSession(); 
 41         // 开启事务
 42         session.beginTransaction(); 
 43         
 44         Student student=(Student)session.get(Student.class, Long.valueOf(1));
 45         session.delete(student);
 46         
 47         // 提交事务
 48         session.getTransaction().commit(); 
 49         // 关闭session
 50         session.close(); 
 51     }
 52     
 53     /**
 54      * 更新
 55      */
 56     private void update(){
 57         // 生成一个session
 58         Session session=sessionFactory.openSession(); 
 59         // 开启事务
 60         session.beginTransaction(); 
 61         
 62         Student student=(Student)session.get(Student.class, Long.valueOf(2));
 63         student.setName("张三2");
 64         session.save(student);
 65         
 66         // 提交事务
 67         session.getTransaction().commit(); 
 68         // 关闭session
 69         session.close(); 
 70     }
 71     
 72     /**
 73      * 查询
 74      */
 75     private void getAllStudent(){
 76         // 生成一个session
 77         Session session=sessionFactory.openSession(); 
 78         // 开启事务
 79         session.beginTransaction(); 
 80         
 81         String hql="from Student";
 82         Query query=session.createQuery(hql);
 83         List<Student> studentList=query.list();
 84         for(Student student:studentList){
 85             System.out.println(student);
 86         }
 87         
 88         // 提交事务
 89         session.getTransaction().commit(); 
 90         // 关闭session
 91         session.close(); 
 92     }
 93 
 94     public static void main(String[] args) {
 95         StudentTest studentTest=new StudentTest();
 96         studentTest.add();
 97 //        studentTest.delete();
 98 //        studentTest.update();
 99 //        studentTest.getAllStudent();
100     }
101 }

第三节：注解版CRUD 实现

导入对应的hibernate的jar包、mysql的jar包和添加每次都需要用到的HibernateUtil.java

hibernate.cfg.xml

 1 <?xml version='1.0' encoding='utf-8'?>
 2 <!DOCTYPE hibernate-configuration PUBLIC
 3         "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 4         "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
 5 
 6 <hibernate-configuration>
 7 
 8     <session-factory>
 9 
10         <!--数据库连接设置 -->
11         <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
12         <property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property>
13         <property name="connection.username">root</property>
14         <property name="connection.password">123456</property>
15 
16        
17         <!-- 方言 -->
18         <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>
19     
20         <!-- 控制台显示SQL -->
21         <property name="show_sql">true</property>
22 
23         <!-- 自动更新表结构 -->
24         <property name="hbm2ddl.auto">update</property>
25 
26         <!-- 注解版CRUD 实现 -->
27         <mapping class="com.wishwzp.model.Teacher"/>
28     </session-factory>
29 
30 </hibernate-configuration>

Teacher.java

 1 package com.wishwzp.model;
 2 
 3 import javax.persistence.Entity;
 4 import javax.persistence.GeneratedValue;
 5 import javax.persistence.Id;
 6 import javax.persistence.Table;
 7 
 8 import org.hibernate.annotations.GenericGenerator;
 9 
10 //实体
11 @Entity
12 //这个是你指定是数据库哪张表,我这里指定的是t_teacher
13 @Table(name="t_teacher")
14 public class Teacher {
15 
16     private long id;
17     private String name;
18     
19     @Id//主键
20     @GeneratedValue(generator="_native")//这里开始使用名为_native的策略
21     @GenericGenerator(name="_native",strategy="native")//这里定义一个名为_native的策略，是native
22     public long getId() {
23         return id;
24     }
25     public void setId(long id) {
26         this.id = id;
27     }
28     public String getName() {
29         return name;
30     }
31     public void setName(String name) {
32         this.name = name;
33     }
34     @Override
35     public String toString() {
36         return "Teacher [id=" + id + ", name=" + name + "]";
37     }
38     
39     
40 }

TeacherTest.java

 1 package com.wishwzp.service;
 2 
 3 import java.util.List;
 4 
 5 import org.hibernate.Query;
 6 import org.hibernate.Session;
 7 import org.hibernate.SessionFactory;
 8 
 9 import com.wishwzp.model.Teacher;
10 import com.wishwzp.util.HibernateUtil;
11 
12 public class TeacherTest {
13     
14     private SessionFactory sessionFactory=HibernateUtil.getSessionFactory();
15     
16     public void add(){
17         Session session=sessionFactory.openSession(); // 生成一个session
18         session.beginTransaction(); // 开启事务
19         
20         Teacher s=new Teacher();
21         s.setName("张三");
22         session.save(s);
23         
24         session.getTransaction().commit(); // 提交事务
25         session.close(); // 关闭session
26     }
27     
28     public void delete(){
29         Session session=sessionFactory.openSession(); // 生成一个session
30         session.beginTransaction(); // 开启事务
31         
32         Teacher Teacher=(Teacher)session.get(Teacher.class, Long.valueOf(1));
33         session.delete(Teacher);
34         
35         session.getTransaction().commit(); // 提交事务
36         session.close(); // 关闭session
37     }
38     
39     public void update(){
40         Session session=sessionFactory.openSession(); // 生成一个session
41         session.beginTransaction(); // 开启事务
42         
43         Teacher Teacher=(Teacher)session.get(Teacher.class, Long.valueOf(2));
44         Teacher.setName("张三2");
45         session.save(Teacher);
46         
47         session.getTransaction().commit(); // 提交事务
48         session.close(); // 关闭session
49     }
50     
51     public void getAllTeacher(){
52         Session session=sessionFactory.openSession(); // 生成一个session
53         session.beginTransaction(); // 开启事务
54         
55         String hql="from Teacher";
56         Query query=session.createQuery(hql);
57         List<Teacher> TeacherList=query.list();
58         for(Teacher Teacher:TeacherList){
59             System.out.println(Teacher);
60         }
61         
62         session.getTransaction().commit(); // 提交事务
63         session.close(); // 关闭session
64     }
65 
66     public static void main(String[] args) {
67         TeacherTest TeacherTest=new TeacherTest();
68         // TeacherTest.add();
69         // TeacherTest.delete();
70         // TeacherTest.update();
71         TeacherTest.getAllTeacher();
72     }
73 }

注释版的我们就不需要在去配置XXX.hbm.xml了。

第四节：Junit4 单元测试框架引入

导入对应的junit包

百度云：http://pan.baidu.com/s/1dFBbhhZ

密码：3z1i

在测试版CRUD的基础上，我们运用junit重写了运行主类mian()。

TeacherTest2.java

 1 package com.wishwzp.service;
 2 
 3 
 4 
 5 import java.util.List;
 6 
 7 import org.hibernate.Query;
 8 import org.hibernate.Session;
 9 import org.hibernate.SessionFactory;
10 import org.junit.Test;
11 
12 import com.wishwzp.model.Teacher;
13 import com.wishwzp.util.HibernateUtil;
14 
15 public class TeacherTest2 {
16     
17     private SessionFactory sessionFactory=HibernateUtil.getSessionFactory();
18     
19     @Test
20     public void testAdd() {
21         Session session=sessionFactory.openSession(); // 生成一个session
22         session.beginTransaction(); // 开启事务
23         
24         Teacher s=new Teacher();
25         s.setName("张三");
26         session.save(s);
27         
28         session.getTransaction().commit(); // 提交事务
29         session.close(); // 关闭session
30     }
31 
32     @Test
33     public void testDelete() {
34         Session session=sessionFactory.openSession(); // 生成一个session
35         session.beginTransaction(); // 开启事务
36         
37         Teacher Teacher=(Teacher)session.get(Teacher.class, Long.valueOf(2));
38         session.delete(Teacher);
39         
40         session.getTransaction().commit(); // 提交事务
41         session.close(); // 关闭session
42     }
43 
44     @Test
45     public void testUpdate() {
46         Session session=sessionFactory.openSession(); // 生成一个session
47         session.beginTransaction(); // 开启事务
48         
49         Teacher Teacher=(Teacher)session.get(Teacher.class, Long.valueOf(3));
50         Teacher.setName("张三2");
51         session.save(Teacher);
52         
53         session.getTransaction().commit(); // 提交事务
54         session.close(); // 关闭session
55     }
56 
57     @Test
58     public void testGetAllTeacher() {
59         Session session=sessionFactory.openSession(); // 生成一个session
60         session.beginTransaction(); // 开启事务
61         
62         String hql="from Teacher";
63         Query query=session.createQuery(hql);
64         List<Teacher> TeacherList=query.list();
65         for(Teacher Teacher:TeacherList){
66             System.out.println(Teacher);
67         }
68         
69         session.getTransaction().commit(); // 提交事务
70         session.close(); // 关闭session
71     }
72 
73 }