配置hibernate

Hibernate 主要是ORM,object-relationship-model.对象关系模型。为了熟悉Hibernate，下面简单的做了一个测试。

jar包。

 1 <!DOCTYPE hibernate-configuration PUBLIC
 2     "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 3     "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 4 
 5 <hibernate-configuration>
 6 
 7     <session-factory>
 8         <property name="hibernate.connection.driver_class"> com.mysql.jdbc.Driver</property>
 9         <property name="hibernate.connection.url"> jdbc:mysql://localhost:3306/test</property>
10         <property name="hibernate.connection.username"> root</property>
11         <property name="hibernate.connection.password"> 1234</property>
12         
13         <property name="hibernate.dialect"> org.hibernate.dialect.MySQLDialect</property>
14         <property name="show_sql">true</property>
15         <property name="hibernate.hbm2ddl.auto">update</property>
16         
17         <mapping resource="com/shuanlei/pojo/Student.hbm.xml"/>
18         
19     </session-factory>
20 </hibernate-configuration>

hibernate.cfg.xml

1 public class Department {
2     private Integer id;
3     private String departDesc;
4     
5     private Set<Employee> employees= new HashSet<Employee>();

Department

 1 <?xml version="1.0"?>
 2 <!DOCTYPE hibernate-mapping PUBLIC 
 3     "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 4     "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 5 <hibernate-mapping 
 6     package="com.shuanlei.pojo">
 7 
 8     <class name="department" table="t_department" lazy="true">
 9         
10         <id name="id">
11             <generator class="native"/>
12         </id>
13         
14         <property name="departDesc" column="departDesc"></property>
15             <set name="employees">
16                 <key>
17                     <column name="emp_id"></column>
18                 </key>
19                 <one-to-many class="Employee"/>
20             </set>
21     </class>
22     
23 </hibernate-mapping>

Department.hbm.xml

1 public class Employee {
2     private Integer id;
3     private String uname;
4     
5     private Department department;

Employee

 1 <?xml version="1.0"?>
 2 <!DOCTYPE hibernate-mapping PUBLIC 
 3     "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 4     "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 5 <hibernate-mapping 
 6     package="com.shuanlei.pojo">
 7 
 8     <class name="Employee" table="t_employee" lazy="true">
 9         
10         <id name="id">
11             <generator class="native"/>
12         </id>
13         
14         <property name="uname" column="uname"></property>
15         <property name="pwd" 
16                 column="pwd"/>
17                 <many-to-one name="department" class="Department">
18                     <column name="emp_id"></column>
19                 </many-to-one>
20     </class>
21     
22 </hibernate-mapping>

Employee.hbm.xml

测试代码

 1 public class TestHiber {
 2 
 3     Session session = HibUtil.getSession();
 4 
 5     public void add(Student stu) {
 6         try {
 7             session.getTransaction().begin();
 8 
 9             session.save(stu);
10             session.getTransaction().commit();
11 
12         } catch (HibernateException e) {
13             session.getTransaction().rollback();
14             e.printStackTrace();
15         } finally {
16 
17             session.close();
18         }
19     }
20 
21     public static void main(String[] args) {
22         Student stu = new Student();
23         stu.setPwd("222");
24         stu.setUname("aba");
25         TestHiber testHiber = new TestHiber();
26         testHiber.add(stu);
27     }
28 
29 }

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