hibernate的投射

hibernate的映射

集合映射

public class CollectionMapping {private int id;private String name;private Set setValue;private List listValue;private String[] arrayValue;private Map mapValue;}

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<class name="CollectionMapping" table="CollectionMapping"><id name="id" type="integer">                        <generator />        </id><property name="name"/><set name="setValue" ><key column="set_id" /><element type="string" column="set_value" /></set><list name="listValue"><key column="list_id" /><list-index column="list_index"/><element type="string" column="list_value"/></list><array name="arrayValue"><key column="array_id" /><list-index column="array_index"/><element type="string" column="array_value" /></array><map name="mapValue"><key column="map_id" /><map-key type="string" column="map_key" /><element type="string" column="map_value" /></map></class>

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public void testSave1() {Session session = null;CollectionMapping c = new CollectionMapping();c.setName("xxx");Set setValue = new HashSet();setValue.add("a");setValue.add("b");c.setSetValue(setValue);List listValue = new ArrayList();listValue.add("c");listValue.add("d");c.setListValue(listValue);String[] arrayValue = new String[]{"e", "f"};c.setArrayValue(arrayValue);Map mapValue = new HashMap();mapValue.put("k1", "v1");mapValue.put("k2", "v2");c.setMapValue(mapValue);try {session = HibernateSessionFactory.getSession();session.beginTransaction();session.save(c);session.getTransaction().commit();}catch(Exception e) {e.printStackTrace();session.getTransaction().rollback();}finally {HibernateSessionFactory.closeSession(session);}}

组件映射

定义一个Contact类，User类，通过配置User映射文件

public class Contact {private String address;private String telephone;private String zipCode;private String email;}

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public class User {private int id;private String name;private Contact contact;}

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<class name="mapping.User" table="t_user"><id name="id"><generator name="code">public static void main(String[] args) {Session session = null;try {session = HibernateSessionFactory.getSession();session.beginTransaction();User user = new  User();user.setName("xxxxx");Contact contact = new Contact();contact.setEmail("xxxx@qq.com");contact.setAddress("china");contact.setZipCode("24237483274");contact.setTelephone("13546546888");user.setContact(contact);session.save(user);} catch (Exception e) {e.printStackTrace();session.getTransaction().rollback();}finally{HibernateSessionFactory.closeSession(session);}}

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复合（联合）主键映射

通常将复合主键相关的属性，单独放到一个类中
?* 此类必须实现序列化接口
?* 覆写hashcode和equals方法

主要一个实现序列号接口的类，主类，映射文件

public class FiscalYearPeriodPK  implements Serializable  {private static final long serialVersionUID = 9033183366102420040L;//核算年private int fiscalYear;//核算月private int fiscalPeriod;public int getFiscalPeriod() {return fiscalPeriod;}public void setFiscalPeriod(int fiscalPeriod) {this.fiscalPeriod = fiscalPeriod;}public int getFiscalYear() {return fiscalYear;}public void setFiscalYear(int fiscalYear) {this.fiscalYear = fiscalYear;}@Overridepublic int hashCode() {final int PRIME = 31;int result = 1;result = PRIME * result + fiscalPeriod;result = PRIME * result + fiscalYear;return result;}@Overridepublic boolean equals(Object obj) {if (this == obj)return true;if (obj == null)return false;if (getClass() != obj.getClass())return false;final FiscalYearPeriodPK other = (FiscalYearPeriodPK) obj;if (fiscalPeriod != other.fiscalPeriod)return false;if (fiscalYear != other.fiscalYear)return false;return true;}}

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 public class FiscalYearPeriod{private FiscalYearPeriodPK fiscalYearPeriodPK;// 开始日期private Date beginDate;// 结束日期private Date endDate;// 状态private String periodSts;}
public void testSave1() {Session session = null;Random ran = new Random();try {session = HibernateSessionFactory.getSession();session.beginTransaction();for(int i=10;i<1000;i++){FiscalYearPeriod fiscalYearPeriod = new FiscalYearPeriod();FiscalYearPeriodPK pk = new FiscalYearPeriodPK();pk.setFiscalYear(ran.nextInt(i));pk.setFiscalPeriod(ran.nextInt(i*1000));fiscalYearPeriod.setFiscalYearPeriodPK(pk);fiscalYearPeriod.setBeginDate(new Date());fiscalYearPeriod.setEndDate(new Date());fiscalYearPeriod.setPeriodSts("Y");session.save(fiscalYearPeriod);}session.getTransaction().commit();}catch(Exception e) {e.printStackTrace();session.getTransaction().rollback();}finally {HibernateSessionFactory.closeSession(session);}}
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