Hibernate入门(一)

1 USE TEST;2 DROP TABLE IF EXISTS customer;3 4 CREATE TABLE customer(5 ????cust_id INT AUTO_INCREMENT PRIMARY KEY,6 ????cust_name VARCHAR(30),7 ????cust_gender VARCHAR(5),8 ????cust_phone VARCHAR(20)9 );

 1 package deep.entity; 2 ?3 import java.io.Serializable; 4 ?5 /** 6 ?* 用户实体类 7 ?* @author DeepSleeping 8 ?* 9 ?*/10 public class Customer implements Serializable{11 ????12 ????private static final long serialVersionUID = 1L;13 ????14 ????private int cust_id;15 ????private String cust_name;16 ????private String cust_gender;17 ????private String cust_phone;18 ????19 ????public int getCust_id() {20 ????????return cust_id;21 ????}22 ????public void setCust_id(int cust_id) {23 ????????this.cust_id = cust_id;24 ????}25 ????public String getCust_name() {26 ????????return cust_name;27 ????}28 ????public void setCust_name(String cust_name) {29 ????????this.cust_name = cust_name;30 ????}31 ????public String getCust_gender() {32 ????????return cust_gender;33 ????}34 ????public void setCust_gender(String cust_gender) {35 ????????this.cust_gender = cust_gender;36 ????}37 ????public String getCust_phone() {38 ????????return cust_phone;39 ????}40 ????public void setCust_phone(String cust_phone) {41 ????????this.cust_phone = cust_phone;42 ????}43 }

1 <!DOCTYPE hibernate-mapping PUBLIC2 ????"-//Hibernate/Hibernate Mapping DTD 3.0//EN"3 ????"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

 1 <?xml version = "1.0" encoding = "UTF-8"?> 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> 7 ????<!-- 建立类和表的一个映射关系 --> 8 ????<!-- ?9 ????????class标签:用来建立类和表的映射10 ????????????*name属性:类中的全路径11 ????????????*table属性:表名(如果类名和表名是一致的，那么table属性可以省略)12 ????????????*catalog属性:数据库名称，可以省略13 ?????-->14 ?????<class name="deep.entity.Customer" table = "customer">15 ?????????<!-- 建立类中的属性与表中的主键的映射 -->16 ?????????<!-- 17 ?????????????id标签:用来建立类中的属性与表中的主键字段对应18 ?????????????????*name属性:类中的属性名19 ?????????????????*column属性:表中字段名(如果类中的属性名和表中的一致，可以省略)20 ?????????????????*length属性:字段的长度21 ?????????????????*type属性:类型 Java数据类型，Hibernate数据类型(默认),SQL类型22 ??????????-->23 ?????????<id name = "cust_id" column = "cust_id">24 ?????????????<!-- 主键生成策略 -->25 ?????????????<generator class="native"></generator>26 ?????????</id>27 ?????????28 ?????????29 ?????????<!-- 建立类中的普通属性与表中的字段的映射 -->30 ?????????<property name="cust_name" column="cust_name"/>31 ?????????<property name="cust_gender" column="cust_gender"/>32 ?????????<property name="cust_phone" column="cust_phone"/>33 ?????????34 ?????</class>35 </hibernate-mapping>

1 <!DOCTYPE hibernate-configuration PUBLIC2 ????"-//Hibernate/Hibernate Configuration DTD 3.0//EN"3 ????"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

 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 ????<session-factory> 8 ????????<!-- 必要的配置信息:连接数据库的基本参数 --> 9 ????????<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>10 ????????<property name="hibernate.connection.url">jdbc:mysql:///test</property>11 ????????<property name="hibernate.connection.username">root</property>12 ????????<property name="hibernate.connection.password">123456</property>13 ????????14 ????????<!-- Hibernate的属性 -->15 ????????<!-- Hibernate的方言:作用，根据配置的方言生成相应的SQL语句 -->16 ????????<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>17 ????????<!-- Hibernate显示SQL语句: -->18 ????????<property name="hibernate.show_sql">true</property>19 ????????<!-- Hibernate格式化SQL语句(不然显示的就是一行，不方便阅读) -->20 ????????<property name="hibernate.format_sql">true</property>21 ????????<!-- Hibernate的hbm2ddl(数据定义语言:create drop alter ...) 属性 -->22 ????????<!-- 23 ????????????hbm2ddl.auto的取值24 ????????????????*none: 不用Hibernate自动生成表25 ????????????????*create:每次都会创建一个新的表(测试)26 ????????????????*create-drop:每次都会创建一个新的表，执行程序结束后删除这个表(测试)27 ????????????????*update:如果数据库中有表，使用原来的表，如果没有表，创建一个新表，可以更新表结构28 ????????????????*validate:只会使用原有的表，对映射关系进行校验29 ?????????-->30 ????????<property name="hibernate.hbm2ddl.auto">update</property>31 ????????32 ????????33 ????????<!-- Hibernate加载映射 -->34 ????????<mapping resource="deep/entity/Customer.hbm.xml"/>35 ????</session-factory>36 </hibernate-configuration>

 1 package deep.test; 2 ?3 import org.hibernate.Session; 4 import org.hibernate.SessionFactory; 5 import org.hibernate.Transaction; 6 import org.hibernate.cfg.Configuration; 7 import org.junit.Test; 8 ?9 import deep.entity.Customer;10 11 /**12 ?* 使用Hibernate保存数据13 ?* @author DeepSleeping14 ?*15 ?*/16 public class demo {17 18 ????@Test19 ????public void save(){20 ????????21 ????????//1.加载配置文件22 ????????Configuration cfg = new Configuration().configure();23 ????????//2.创建一个SessionFactory24 ????????SessionFactory sessionFactory = cfg.buildSessionFactory();25 ????????//3.创建Session对象，Session对象类似Connection26 ????????Session session = sessionFactory.openSession();27 ????????28 ????????//4.开启事务29 ????????Transaction tx = session.beginTransaction();30 ????????31 ????????//5.执行相关操作32 ????????Customer customer = new Customer();33 ????????customer.setCust_name("Hibernate测试");34 ????????session.save(customer);35 ????????36 ????????//6.事务提交37 ????????tx.commit();38 ????????//7.释放资源39 ????????session.close();40 ????}41 ????42 ????43 ????44 ????45 }