Hibernate入门案例(Maven项目)
Hibernate的相关jar包:
案例:
1. 导入相关的依赖
<dependencies>
<!--导入hibernate需要的依赖-->
<dependency>
<groupId>antlr</groupId>
<artifactId>antlr</artifactId>
<version>2.7.6</version>
</dependency>
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.1</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>5.0.7.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>1.0.0.Final</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.11.0.GA</version>
</dependency>
<dependency>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-jta_1.1_spec</artifactId>
<version>1.1.1</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>1.6.6</version>
</dependency>
<!--mysql连接依赖-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.32</version>
</dependency>
<!--junit单元测试依赖-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
2. 根据表结构创建domain/pojo下的model类(实体类)
* 表结构 :
FieldType
id int(11)
username varchar(32)
birthday datetime
sex char(1)
address varchar(256)
* 实体类User
public class User {
private Integer id;
private String username;
private Date birthday;
private String sex;
private String address;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
3. 创建model的映射文件
* UserModel.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>
<!-- 类与表的映射制作在class元素上 -->
<!-- name:全路径类名 -->
<!-- table:表名 -->
<class name="com.qin.domain.User" table="user">
<!-- 主键的映射制作在id元素上 -->
<!-- name:对象中用于作为主键的属性名 -->
<!-- colomn:表中主键字段名 -->
<!-- 如果name与column值相同,可以省略column -->
<id name="id" column="id">
<!-- 将generator元素class属性设置为"assigned" 手动生成,必须给id -->
<generator class="identity" />
<!--**要注意Hibernate主键生成策略**-->
</id>
<!-- 属性与字段的映射制作在property元素上 -->
<!-- name:类中的属性名 -->
<!-- column:表中的字段名 -->
<!-- 如果name与column值相同,可以省略column -->
<property name="username" />
<property name="birthday" />
<property name="sex" />
<property name="address"/>
</class>
</hibernate-mapping>
4. 配置Hibernate的配置文件
* hibernate.cfg.xml. 放到classpath下.
<?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>
<!-- 数据库连接的配置 -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/mybatis</property>
<property name="connection.username">root</property>
<property name="connection.password">root</property>
<!-- 可选配置 -->
<!--是否支持方言 -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!--执行CURD时是否打印sql 语句 -->
<property name="show_sql">true</property>
<!-- 资源注册 -->
<mapping resource="com/qin/domain/UserModel.hbm.xml"/>
</session-factory>
</hibernate-configuration>
5. 测试
@Test
public void hbnTest(){
//1.创建要测试的对象
User user = new User();
user.setUsername("hibernateTest");
user.setSex("男");
user.setBirthday(new Date());
user.setAddress("北京");
//2.加载配置信息
Configuration conf = new Configuration().configure();
//3.基于配置信息,创建SessionFactory对象
SessionFactory sessionFactory = conf.buildSessionFactory();
//4.打开一个与数据库相关的session对象
Session session = sessionFactory.openSession();
//5.开启事务,基于session得到
Transaction transaction = session.beginTransaction();
//6.通过session保存数据
session.save(user);
//7.提交事务
transaction.commit();
//8.操作完毕,关闭session连接对象
session.close();
}
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