Hibernate基础案例1

使用到的是MySQL数据库

1.在项目中先引入jar包，并添加引用

 <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.3</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>antlr</groupId>
      <artifactId>antlr</artifactId>
      <version>2.7.7</version>
    </dependency>

    <dependency>
      <groupId>commons-collections</groupId>
      <artifactId>commons-collections</artifactId>
      <version>3.2.1</version>
    </dependency>

    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.1.1</version>
    </dependency>

    <dependency>
      <groupId>dom4j</groupId>
      <artifactId>dom4j</artifactId>
      <version>1.6.1</version>
    </dependency>

    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-core</artifactId>
      <version>5.2.10.Final</version>
    </dependency>

    <dependency>
      <groupId>org.hibernate.javax.persistence</groupId>
      <artifactId>hibernate-jpa-2.0-api</artifactId>
      <version>1.0.1.Final</version>
    </dependency>

    <dependency>
      <groupId>javassist</groupId>
      <artifactId>javassist</artifactId>
      <version>3.12.1.GA</version>
    </dependency>


    <dependency>
      <groupId>javax.transaction</groupId>
      <artifactId>jta</artifactId>
      <version>1.1</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/log4j/log4j -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.6.1</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.5</version>
      <scope>test</scope>
    </dependency>
    <!--mysql-->
    <dependency>
      <groupId>org.wisdom-framework</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.34_1</version>
    </dependency>


  </dependencies>

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在引用jar包的时候先不要引用javaee-api的jar，会报错

2.写学生的实体类

 //学号
    private Integer sid;
    //姓名
    private String name;
    //年龄
    private Integer age;

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3.Hibernate.cfg.xml配置（cfg表示的是configuration）

 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 <hibernate-configuration>
 6     <session-factory>
 7         <!--数据库MSQ驱动-->
 8         <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
 9         <!--数据库URL-->
10         <property name="connection.url">jdbc:mysql://localhost/hibernates?
11             characterEncoding=gb2312</property>
12         <!--数据库用户名-->
13          <property name="connection.username">root</property>
14             <!--数据库密码-->
15         <property name="connection.password">root</property>
16         <!--方言-->
17         <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
18 
19        <!--输出所有语句到控制台-->
20        <property name="hibernate.show_sql">true</property>
21 
22         <!--在log和conlose中打印出更  格式化显示SQL-->
23      <property name="hibernate.format_sql">true</property>
24 
25         <!-- hbm2ddl  -->
26         <property name="hibernate.hbm2ddl.auto">update</property>
27 
28         <!-- 指定当前session范围和上下文 thread指当前线程来跟踪管理 -->
29         <property name="current_session_context_class">thread</property>
30 
31         <!-- 映射文件配置，注意配置文件名必须包含其相对于classpath的全路径 -->
32         <mapping resource="Student.hbm.xml"></mapping>
33     </session-factory>
34 </hibernate-configuration>

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4.Student.hbm.xml

 1 <?xml version='1.0'  encoding='utf-8'?>
 2 
 3 <!DOCTYPE hibernate-mapping PUBLIC
 4         "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 5         "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
 6 <hibernate-mapping package="cn.happy.entity">
 7 <class name="Student" table="Student"><!--表名，不区分大小写-->
 8     <id name="sid" column="sid">
 9 <generator class="native"></generator>
10         <!--native ：
11         如果后台是Oracle，自动创建序列
12                    后台是MySQL，自动自增
13 -->
14     </id>
15     <property name="name" type="string" column="name"/>
16     <property name="age"/>
17 </class>
18 </hibernate-mapping>

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5.测试类，使得数据使用Hibernate保存到数据库中

 1   @Test
 2     public void testhibernate() {
 3 
 4         //01准备一个学生对象
 5         Student stu = new Student();
 6         stu.setSid(3);
 7         stu.setName("白白");
 8         stu.setAge(44);
 9 
10         //02Hibernate 保存
11         //读取大配置文件，获取连接的数据库信息
12         Configuration cfg=new Configuration().configure();
13 
14         //3创建SessionFactory
15         SessionFactory factory=cfg.buildSessionFactory();
16 
17         //加工session
18        Session session=factory.openSession();
19 
20        //开启事务
21         Transaction tx=session.beginTransaction();
22 
23        //5Hibernate
24 
25         session.save(stu);
26 
27         tx.commit();
28         System.out.println("save  ok");
29     }

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6.实现效果图