Hibernate一对一双向关联（注解）-白红宇

Hibernate一对一双向关联（注解）

阅读量：5059 次

发布时间：2019-06-12

本文共 7110 字，大约阅读时间需要 23 分钟。

每一个人(Person)对应一个身份证号(IdCard)

1 package cqvie.yjq.domain; 2  3 import java.util.Date; 4  5 import javax.persistence.Column; 6 import javax.persistence.Entity; 7 import javax.persistence.GeneratedValue; 8 import javax.persistence.Id; 9 import javax.persistence.JoinColumn;10 import javax.persistence.OneToOne;11 import javax.persistence.Table;12 13 import org.hibernate.annotations.GenericGenerator;14 15 16 @Entity17 @Table(name = "id_card", catalog = "test")18 public class IdCard implements java.io.Serializable {19 20     private static final long serialVersionUID = -5388108961244621175L;21     22     @Id23     @GenericGenerator(name = "generator", strategy = "uuid")24     @GeneratedValue(generator = "generator")25     @Column(name = "card_id", unique = true, nullable = false)26     private String id;27     @Column(name = "validate")28     private Date validateDte;29     @OneToOne30     @JoinColumn(name = "per")31     private Person person;32     33     public String getId() {34         return id;35     }36     public void setId(String id) {37         this.id = id;38     }39     public Date getValidateDte() {40         return validateDte;41     }42     public void setValidateDte(Date validateDte) {43         this.validateDte = validateDte;44     }45     public Person getPerson() {46         return person;47     }48     public void setPerson(Person person) {49         this.person = person;50     }51     52 }

实体类IdCard

1 package cqvie.yjq.domain; 2  3 import javax.persistence.Column; 4 import javax.persistence.Entity; 5 import javax.persistence.GeneratedValue; 6 import javax.persistence.Id; 7 import javax.persistence.JoinColumn; 8 import javax.persistence.OneToOne; 9 import javax.persistence.Table;10 11 import org.hibernate.annotations.GenericGenerator;12 13 @Entity14 @Table(name = "person", catalog = "test")15 public class Person implements java.io.Serializable {16 17     private static final long serialVersionUID = 3860690163559279293L;18     19     @Id20     @GenericGenerator(name = "generator", strategy = "uuid")21     @GeneratedValue(generator = "generator")22     @Column(name = "per_id", unique = true, nullable = false)23     private String id;24     @Column(name = "name", nullable = false, length = 20)25     private String name;26     @OneToOne27     @JoinColumn(name = "id_c")28     private IdCard idCard;29     30     31     public String getId() {32         return id;33     }34     public void setId(String id) {35         this.id = id;36     }37     public String getName() {38         return name;39     }40     public void setName(String name) {41         this.name = name;42     }43     public IdCard getIdCard() {44         return idCard;45     }46     public void setIdCard(IdCard idCard) {47         this.idCard = idCard;48     }49     50 }

实体类Person

1 package cqvie.yjq.View; 2  3 import java.util.Date; 4  5 import org.hibernate.Session; 6 import org.hibernate.Transaction; 7 import org.hibernate.cfg.AnnotationConfiguration; 8 import org.hibernate.cfg.Configuration; 9 import org.hibernate.tool.hbm2ddl.SchemaExport;10 11 import cqvie.yjq.Util.HibernataUtil;12 import cqvie.yjq.domain.IdCard;13 import cqvie.yjq.domain.Person;14 15 public class Test {16 17     public static void main(String[] args) {18     19         //调用建表语句20         exportDDL();21         //添加一组person22         Session session = null;23         Transaction tx = null;24         try {25             session = HibernataUtil.getCurrentSession();26             tx = session.beginTransaction();27             28             Person p1 = new Person();29             p1.setName("张三");30             31             IdCard idCard = new IdCard();32             idCard.setValidateDte(new Date());33             p1.setIdCard(idCard);34             idCard.setPerson(p1);35             session.save(p1);36             session.save(idCard);37             38             tx.commit();39         } catch (Exception e) {40             if(tx != null) {41                 tx.rollback();42             }43         } finally {44             if(session != null && session.isOpen()) {45                 session.close();46             }47         }48         49     }50 51     //建表语句52     public static void exportDDL() {  53         Configuration configuration = new AnnotationConfiguration().configure();   54         SchemaExport sexport = new SchemaExport(configuration);  55         sexport.setFormat(true);//格式化输出  56           sexport.setDelimiter(";");      //每句sql都以;结尾  不然导入sql的时候会出现错误  57         sexport.setOutputFile("D:\\auto.sql");  58         sexport.create(true, true);  59     }  60 }

测试类Test

1 
        2  5  6 
        7 
       
         8  9 
        
         10     
         
          11         org.hibernate.dialect.MySQLDialect12     
         13     
         
          14         jdbc:mysql://localhost:3306/test15     
         16     
         
          root
         17     
         
          123
         18     
         
          19         com.mysql.jdbc.Driver20     
         21     
         
          MySQL
         22     
         
          true
         23     
         24     
         
          true
         25 26     
         
          thread
         27     
         28     
         
          create
         29     
         30     
         31 
        32 33

Hibernate.cfg.xml

1 package cqvie.yjq.Util;  2   3 import java.util.List;  4   5 import org.hibernate.Query;  6 import org.hibernate.Session;  7 import org.hibernate.SessionFactory;  8 import org.hibernate.Transaction;  9 import org.hibernate.cfg.AnnotationConfiguration; 10  11 final public class HibernataUtil { 12  13     private static SessionFactory sessionFactory = null; 14     //使用线程局部模式 15     private static ThreadLocal
       
         threadLocal = new ThreadLocal
        
         (); 16     private HibernataUtil() {}; 17     static { 18         sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory(); 19     } 20     //获取全新的session 21     public static Session openSession() { 22         return sessionFactory.openSession(); 23     } 24     //获取和线程关联的session 25     public static Session getCurrentSession() { 26         Session session = threadLocal.get(); 27         //判断是否得到 28         if(session == null) { 29             session = sessionFactory.openSession(); 30             //把session对象设置到threadLocal，相当于已经和线程绑定 31             threadLocal.set(session); 32         } 33         return session; 34     } 35      36     //提供一个统一的修改和删除方法（批量） 37     public static void executeUpdate(String hql, String[] parameters) { 38         Session s = null; 39         Transaction ts = null; 40         try { 41             s = openSession(); 42             ts = s.beginTransaction(); 43             Query query = s.createQuery(hql); 44             //先判断是否有参数要绑定 45             if(parameters != null && parameters.length > 0) { 46                 for(int i=0;i
         
           0) { 93                 for(int i=0;i
          
            0) {121                 for(int i=0;i