文章目录
<dependencies>
<!-- hibernate核心jar包 -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.1.0.Final</version>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
<!-- mysqljar包 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
package cn.tedu.bean;
public class Student {
private String name;
private Integer id; //主键
private Integer age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
实体类名.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">
<!-- 根节点 -->
<hibernate-mapping>
<!-- name:指定实体类的路径 table:指定该实体类对应的表的名称 -->
<class name="cn.tedu.bean.Student" table="student">
<!-- <id>配置主键,name指定JavaBean中的属性,column指定的是表中的属性 -->
<id name="id" column="id">
<!-- 配置主键的生成策略 自增长-->
<generator class="native"></generator>
</id>
<!-- property是定义非主键的类型 name:指定实体类中的属性名称 column:指定实体类中的属性对应在表中的元素的名称 如果这里的name和column相同,那么可以省略这里的colum,不过建议写全,更加清晰 -->
<property name="name" column="name"></property>
<property name="age" column="age"></property>
</class>
</hibernate-mapping>
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>
<!-- 必须要配置的5大参数,4大参数,一个方言 其中的四大参数是连接JDBC必须的参数 这里的方言也是必须的 -->
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hirbernate</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<!-- mysql的方言 -->
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- 可选的配置文件 -->
<!-- 输出所有的sql语句到控制台 -->
<property name="hibernate.show_sql">true</property>
<!-- 在控制台上打印出漂亮的sql语句 -->
<property name="hibernate.format_sql">true</property>
<!-- 配置如果这个表还没有创建,那么就会自动创建,如果已经创建了,那么会自动更新 -->
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- 映射配置文件,这里是引用Student类的配置文件,注意这里的配置文件可以有多个 -->
<mapping resource="cn/tedu/bean/Student.hbm.xml" />
</session-factory>
</hibernate-configuration>
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUntil {
private static Configuration configuration;
private static SessionFactory sessionFactory;
/*
* 静态语句块中的内容只是在类加载的时候只创建一次,因此这里的大大减少了资源的消耗
*/
static {
// 加载核心配置文件hibernate.cfg.xml
configuration = new Configuration();
configuration.configure();
// 创建SessionFactotry对象
sessionFactory = configuration.buildSessionFactory();
}
//创建session对象,在测试类中可以使用这个静态方法获取session
public static Session getSession() {
return sessionFactory.openSession();
}
}
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.junit.Test;
import cn.tedu.bean.Student;
import cn.tedu.utils.HibernateUntil;
public class Demo1 {
@Test
public void TestAdd() {
Session session = null;
Transaction transaction = null;
try {
// 创建session
session = HibernateUntil.getSession();
// 开始事务
transaction = session.beginTransaction();
Student student = new Student();
student.setAge(22);
student.setName("陈加兵");
// 保存数据到数据库
session.save(student);
// 提交事务
transaction.commit();
} catch (Exception exception) {
transaction.rollback(); // 事务回滚
} finally {
if (session!=null) {
session.close();
}
}
}