hibernate单向无连接表1—N关系映射

1、首先创建数据库本示例采用sql sever 2008 r2数据库进行测试

创建address表

创建person表

2、在myeclipse中通过hibernate反向工程生成对应的实体类并做修改为如下

创建address的实体类

package com.wxb.model;import java.util.HashSet;import java.util.Set;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.FetchType;import javax.persistence.GeneratedValue;import javax.persistence.JoinColumn;import javax.persistence.OneToOne;import static javax.persistence.GenerationType.IDENTITY;import javax.persistence.Id;import javax.persistence.OneToMany;import javax.persistence.Table;import org.hibernate.annotations.Cascade;import org.hibernate.annotations.CascadeType;/** * PersonInf entity. *  * @author 王校兵 * @version 1.0, 2015-11-27 */@Entity@Table(name = "address_inf")public class AddressInf implements java.io.Serializable {// Fieldsprivate Integer addressId;private String addressDetial;private Set<PersonInf> personInf = new HashSet<PersonInf>();/** default constructor */public AddressInf() {}/** minimal constructor */public AddressInf(String addressDetial) {this.addressDetial = addressDetial;}@Id@GeneratedValue(strategy = IDENTITY)@Column(name = "address_id")public Integer getAddressId() {return this.addressId;}@Column(name = "addressDetial", nullable = false)public String getAddressDetial() {return this.addressDetial;}@OneToMany@JoinColumn(name = "address_id")public Set<PersonInf> getPersonInf() {return personInf;}public void setAddressDetial(String addressDetial) {this.addressDetial = addressDetial;}public void setAddressId(Integer addressId) {this.addressId = addressId;}public void setPersonInf(Set<PersonInf> personInf) {this.personInf = personInf;}}

创建person的实体类

package com.wxb.model;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.FetchType;import javax.persistence.GeneratedValue;import javax.persistence.OneToOne;import static javax.persistence.GenerationType.IDENTITY;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.ManyToOne;import javax.persistence.Table;import org.hibernate.annotations.Cascade;import org.hibernate.annotations.CascadeType;/** * PersonInf entity. *  * @author 王校兵 * @version 1.0, 2015-11-27 */@Entity@Table(name = "person_inf")public class PersonInf implements java.io.Serializable {private Integer personId;private Integer age;private String name;private Integer addressId;@Column(name = "address_id")public Integer getAddressId() {return addressId;}public Integer getAge() {return this.age;}public String getName() {return this.name;}@Id@GeneratedValue(strategy = IDENTITY)@Column(name = "person_id")public Integer getPersonId() {return this.personId;}public void setAddressId(Integer addressId) {this.addressId = addressId;}public void setAge(Integer age) {this.age = age;}public void setName(String name) {this.name = name;}public void setPersonId(Integer personId) {this.personId = personId;}}

3、创建对应的测试类

测试向数据库中插入数据

package com.wxb.dao;import org.hibernate.Session;import org.hibernate.Transaction;import com.wxb.model.AddressInf;import com.wxb.model.PersonInf;import com.wxb.util.HibernateSessionFactory;/** * 单向一对多关系映射测试类<span style="font-family: Arial; font-size: 14px; line-height: 26px; white-space: pre;">测试向数据库中插入数据</span> * @author 王校兵 * @version 1.0, 2015-11-28 * */public class SingleOneToNDao {public static void main(String[] args) {Session session = HibernateSessionFactory.getSession();Transaction ts = session.beginTransaction();PersonInf p = new PersonInf();p.setName("crazyit.org");p.setAge(21);PersonInf p1 = new PersonInf();p1.setName("crazy234it.org");p1.setAge(23234);PersonInf p11 = new PersonInf();p11.setName("sd.org");p11.setAge(2);AddressInf a = (AddressInf) session.get(AddressInf.class, 40); p.setAddressId(a.getAddressId());p1.setAddressId(a.getAddressId());p11.setAddressId(a.getAddressId());session.save(p);session.save(p1);session.save(p11);ts.commit();}}

测试读取数据库中的数据

package com.wxb.dao;import org.hibernate.Session;import org.hibernate.Transaction;import com.wxb.model.AddressInf;import com.wxb.model.PersonInf;import com.wxb.util.HibernateSessionFactory;/** * 单向一对多关系映射测试类,测试读取数据 * @author 王校兵 * @version 1.0, 2015-11-28 * */public class SingleOneToOneReadDao {public static void main(String[] args) {Session session = HibernateSessionFactory.getSession();Transaction ts = session.beginTransaction();AddressInf a = (AddressInf)session.get(AddressInf.class, 40);System.out.println("a.getAddressDetial()-----   " + a.getAddressDetial());//System.out.println(a.getPersonInf().getClass());System.out.println(a.getPersonInf().size());for(PersonInf s:a.getPersonInf()){PersonInf p = (PersonInf)s;System.out.println(p.getName());}}}