Hibernate学习之表一对多，多对一关系

代码：

person类：

public class Person {

	private long id;
	
	private String name;
	
	private int age;
	
	private Date birthDay;
	
	private int schNo;

	public long getId() {
		return id;
	}

	public void setId(long id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public Date getBirthDay() {
		return birthDay;
	}

	public void setBirthDay(Date birthDay) {
		this.birthDay = birthDay;
	}
	
	public int getSchNo() {
		return schNo;
	}

	public void setSchNo(int schNo) {
		this.schNo = schNo;
	}

	public Person() {
		super();
	}

	public Person(long id, String name, int age, Date birthDay, int schNo) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
		this.birthDay = birthDay;
		this.schNo = schNo;
	}

	@Override
	public String toString() {
		return "Person [id=" + id + ", name=" + name + ", age=" + age
				+ ", birthDay=" + birthDay + ", schNo=" + schNo + "]";
	}
}

school类：

public class School {

	private int schNo;
	
	private String schName;
	
	private Set<Person> persons;

	public int getSchNo() {
		return schNo;
	}

	public void setSchNo(int schNo) {
		this.schNo = schNo;
	}

	public String getSchName() {
		return schName;
	}

	public void setSchName(String schName) {
		this.schName = schName;
	}

	public School(int schNo, String schName) {
		super();
		this.schNo = schNo;
		this.schName = schName;
	}

	public Set<Person> getPersons() {
		return persons;
	}

	public void setPersons(Set<Person> persons) {
		this.persons = persons;
	}

	public School() {
		super();
	}
}

test.hbm.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
        '-//Hibernate/Hibernate Mapping DTD 3.0//EN'
        'http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd'>
<hibernate-mapping>
    <class name="hibernate.entity.Person" table="person">
        <id name="id" column="pid"></id>
        <property name="name" column="pname"></property>
		<property name="birthDay" type="date" ></property>
		<property name="age"></property>
		<many-to-one name="schNo" column="schNo" class="hibernate.entity.School"/>
    </class>
    
    <class name="hibernate.entity.School" table="school">
        <id name="schNo" column="schNo">
        	<generator class="native"></generator>
        </id>
        <property name="schName" column="schName"></property>
        <set name="persons">
        	<key column="schNo"/>
        	<one-to-many class="hibernate.entity.Person"/>
        </set>
    </class>
</hibernate-mapping>

测试：

创建表并导出建表语句

@Test
	public void test8(){
		Configuration config = new Configuration().configure("test.hbmcfg.xml");
		SchemaExport schemaExport = new SchemaExport(config);
		schemaExport.setOutputFile("D:"+File.separator+"test"+File.separator+"hibrenate_table.sql");
		schemaExport.setFormat(true);
		schemaExport.create(true, true);
		//schemaExport.execute(true, true, false, true);
	}

结果：

    drop table person cascade constraints

    drop table school cascade constraints

    drop sequence hibernate_sequence

    create table person (
        pid number(19,0) not null,
        pname varchar2(255 char),
        birthDay date,
        age number(10,0),
        schNo number(10,0),
        primary key (pid)
    )

    create table school (
        schNo number(10,0) not null,
        schName varchar2(255 char),
        primary key (schNo)
    )

    alter table person 
    add constraint FKC4E39B55D836733C foreign key (schNo)  references school
    create sequence hibernate_sequence