Hibernate一对多双向，多对多双向，排序

其他 2018-11-27 02:27:32 阅读次数: 0 
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.onetomanydouble">
    <class name="Dept" table="Dept" schema="zyz">
        <id name="deptno" column="deptno">
            <generator class="native"></generator>
        </id>
        <property name="deptname" />
        <!--植入一个set标签-->
        <set name="emps" cascade="save-update">
            <!--多的一方表的外键列-->
            <key column="deptno"></key>
            <one-to-many class="Emp"></one-to-many>
        </set>
    </class>
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.onetomanydouble">
    <class name="Emp" table="Emp" schema="zyz">
        <id name="empno" column="empno">
           <generator class="native"></generator>
        </id>
        <property name="empname" />
        <many-to-one  name="dept" column="deptno" class="Dept"></many-to-one>
    </class>
</hibernate-mapping>

@Test
public void testOneToManyDouble(){
    Configuration cfg=new Configuration().configure();
    SessionFactory factory=cfg.buildSessionFactory();
    Session session=factory.openSession();
    List<Dept> list=session.createQuery("from Dept").list();
    for(Dept dept:list){
        System.out.println(dept.getDeptname());
        System.out.println("=====================");
        for(Emp emp:dept.getEmps()){
            System.out.println(emp.getEmpname());
        }
    }
}




排序

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.onetomanydouble">
    <class name="Dept" table="Dept" schema="zyz">
        <id name="deptno" column="deptno">
            <generator class="native"></generator>
        </id>
        <property name="deptname" />
        <!--植入一个set标签-->
        <set name="emps" cascade="save-update" inverse="true" order-by="empname desc">
            <!--多的一方表的外键列-->
            <key column="deptno"></key>
            <one-to-many class="Emp"></one-to-many>
        </set>
    </class>
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.onetomanydouble">
    <class name="Emp" table="Emp" schema="zyz">
        <id name="empno" column="empno">
           <generator class="native"></generator>
        </id>
        <property name="empname" />
        <many-to-one  name="dept" column="deptno" class="Dept"></many-to-one>
    </class>
</hibernate-mapping>

@Test
public void orderby(){
    Configuration cfg=new Configuration().configure();
    SessionFactory factory=cfg.buildSessionFactory();
    Session session=factory.openSession();
    Dept dept=session.get(Dept.class,10);
    for (Emp emp:dept.getEmps()){
        System.out.println(emp.getEmpname());
    }
}





多对多双向


<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.manytomany">
    <class name="Employee" table="Employee" schema="zyz">
        <id name="empid" column="empno">
           <generator class="native"></generator>
        </id>
        <property name="ename" />
        <!--table指的是中间表-->
        <set name="projects" table="PROEMP" inverse="true">
            <key column="REMPID"></key>
            <many-to-many column="RPROID" class="Project"></many-to-many>
        </set>
    </class>
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.manytomany">
    <class name="Project" table="Project" schema="zyz">
        <id name="proid" column="proid">
           <generator class="native"></generator>
        </id>
        <property name="proname" />
    </class>
</hibernate-mapping>


@Test
public void testPrintEmp(){
    Configuration cfg=new Configuration().configure();
    SessionFactory factory=cfg.buildSessionFactory();
    Session session=factory.openSession();
    Employee employee = session.get(Employee.class, 7369);
    System.out.println(employee.getEname());
    System.out.println("==================");
    for (Project project:employee.getProjects()){
        System.out.println(project.getProname());
    }
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.onetomanydouble">
    <class name="Dept" table="Dept" schema="zyz">
        <id name="deptno" column="deptno">
            <generator class="native"></generator>
        </id>
        <property name="deptname" />
        <!--植入一个set标签-->
        <set name="emps" cascade="save-update">
            <!--多的一方表的外键列-->
            <key column="deptno"></key>
            <one-to-many class="Emp"></one-to-many>
        </set>
    </class>
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.onetomanydouble">
    <class name="Emp" table="Emp" schema="zyz">
        <id name="empno" column="empno">
           <generator class="native"></generator>
        </id>
        <property name="empname" />
        <many-to-one  name="dept" column="deptno" class="Dept"></many-to-one>
    </class>
</hibernate-mapping>

@Test
public void testOneToManyDouble(){
    Configuration cfg=new Configuration().configure();
    SessionFactory factory=cfg.buildSessionFactory();
    Session session=factory.openSession();
    List<Dept> list=session.createQuery("from Dept").list();
    for(Dept dept:list){
        System.out.println(dept.getDeptname());
        System.out.println("=====================");
        for(Emp emp:dept.getEmps()){
            System.out.println(emp.getEmpname());
        }
    }
}




排序

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.onetomanydouble">
    <class name="Dept" table="Dept" schema="zyz">
        <id name="deptno" column="deptno">
            <generator class="native"></generator>
        </id>
        <property name="deptname" />
        <!--植入一个set标签-->
        <set name="emps" cascade="save-update" inverse="true" order-by="empname desc">
            <!--多的一方表的外键列-->
            <key column="deptno"></key>
            <one-to-many class="Emp"></one-to-many>
        </set>
    </class>
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.onetomanydouble">
    <class name="Emp" table="Emp" schema="zyz">
        <id name="empno" column="empno">
           <generator class="native"></generator>
        </id>
        <property name="empname" />
        <many-to-one  name="dept" column="deptno" class="Dept"></many-to-one>
    </class>
</hibernate-mapping>

@Test
public void orderby(){
    Configuration cfg=new Configuration().configure();
    SessionFactory factory=cfg.buildSessionFactory();
    Session session=factory.openSession();
    Dept dept=session.get(Dept.class,10);
    for (Emp emp:dept.getEmps()){
        System.out.println(emp.getEmpname());
    }
}





多对多双向


<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.manytomany">
    <class name="Employee" table="Employee" schema="zyz">
        <id name="empid" column="empno">
           <generator class="native"></generator>
        </id>
        <property name="ename" />
        <!--table指的是中间表-->
        <set name="projects" table="PROEMP" inverse="true">
            <key column="REMPID"></key>
            <many-to-many column="RPROID" class="Project"></many-to-many>
        </set>
    </class>
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.hb03mapping.manytomany">
    <class name="Project" table="Project" schema="zyz">
        <id name="proid" column="proid">
           <generator class="native"></generator>
        </id>
        <property name="proname" />
    </class>
</hibernate-mapping>


@Test
public void testPrintEmp(){
    Configuration cfg=new Configuration().configure();
    SessionFactory factory=cfg.buildSessionFactory();
    Session session=factory.openSession();
    Employee employee = session.get(Employee.class, 7369);
    System.out.println(employee.getEname());
    System.out.println("==================");
    for (Project project:employee.getProjects()){
        System.out.println(project.getProname());
    }
}

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