双向-外键关联

一.首先建立工程

二.导入hibernate核心包和MySQL-connection包,代码如下:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.yztc</groupId>
  <artifactId>annotation3</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>annotation3 Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-core</artifactId>
      <version>5.2.11.Final</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.42</version>
    </dependency>
  </dependencies>
  <build>
    <finalName>annotation3</finalName>
  </build>
</project>

三.配置hibernate.cfg.xml文档,代码如下:

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <!--数据库连接url配置-->
        <property name="connection.url">jdbc:mysql:///hibernate2?useUnicode=true&amp;characterEncoding=UTF-8</property>
        <!--数据库驱动配置-->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <!--数据库用户名配置-->
        <property name="connection.username">root</property>
        <!--数据库密码配置-->
        <property name="connection.password">ROOT</property>
        <!-- 方言属性：这个是实现跨数据库关键类 具体查询api-->
        <property name="dialect">org.hibernate.dialect.MySQL55Dialect</property>
        <!-- 是否显示sql -->
        <property name="show_sql">true</property>
        <!--是否格式化SQL语句-->
        <property name="format_sql">true</property>
        <!--是否自动生成表：可选用create update  create-drop validate-->
        <property name="hbm2ddl.auto">create</property>
        <mapping class="com.yztc.app.entity.Address"/>
        <mapping class="com.yztc.app.entity.User"/>
    </session-factory>
</hibernate-configuration>

四.创建entity实体类:User.class和Address.class类,并使用注解,详细代码如下:

package com.yztc.app.entity;

import org.hibernate.annotations.GenericGenerator;

import javax.persistence.*;
import java.math.BigDecimal;

/**
 * 一对一
 *  单向  主键关联    单向外键关联
 *  双向  外键关联
 *
 */

@Entity
@Table(name = "TB_USERR")
public class User {
    @Id
    @Column(name = "USER_ID",length = 32)
    @GeneratedValue(generator = "uuuid_generator")//generator 主键生成器
    @GenericGenerator(name ="uuuid_generator",strategy = "uuid")//strategy 注解生成器
    private String userId;
    @Column(name = "NAME",length = 64)
    private String name;
    @Column(name = "PRICE",precision = 8,scale = 2)
    private BigDecimal price;
    @Transient
    private int state;
    @OneToOne(cascade = CascadeType.ALL)
    @PrimaryKeyJoinColumn
    private Address address;

    public int getState() {
        return state;
    }

    public void setState(int state) {
        this.state = state;
    }


    public BigDecimal getPrice() {
        return price;
    }

    public void setPrice(BigDecimal price) {
        this.price = price;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    public String getUserId() {
        return userId;
    }

    public void setUserId(String userId) {
        this.userId = userId;
    }

    public String getName() {
        return name;
    }

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

    public User() {
    }
}

package com.yztc.app.entity;

import org.hibernate.annotations.GenericGenerator;
import javax.persistence.*;

@Entity
@Table(name = "TB_ADDRESS")
public class Address {
    @Id
    @Column(name = "ADD_ID",length = 32)
    @GeneratedValue(generator = "uuid")
    @GenericGenerator(name = "uuid" ,strategy = "uuid")
    private String addId;
    @Column()
    private String name;
    @OneToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "USER_ID")//表示 外键的名称
    private User user;

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public String getAddId() {
        return addId;
    }

    public void setAddId(String addId) {
        this.addId = addId;
    }

    public String getName() {
        return name;
    }

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

五.测试类,进行测试,代码如下:

package com.yztc.test;

import com.yztc.app.entity.Address;
import com.yztc.app.entity.User;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class TestOneToOne {

    private SessionFactory sf;
    private Session session;

    @Before
    public void init(){
        sf = new Configuration().configure().buildSessionFactory();
        session = sf.openSession();

    }
    @Test
    public void testSave(){
        Transaction transaction = session.beginTransaction();

        User user = new User();
        user.setName("用户1");
        Address address = new Address();
        address.setName("深圳");
        address.setUser(user);
       user.setAddress(address);
       session.save(user);
        transaction.commit();


    }
    @After
    public void destory(){
        session.close();
    }
}

六.测试结果:

"C:Program Files (x86)Javajdk1.8.0_131injava" -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:E:Program FilesJetBrainsIntelliJ IDEA 2017.2.1libidea_rt.jar=56973:E:Program FilesJetBrainsIntelliJ IDEA 2017.2.1in" -Dfile.encoding=UTF-8 -classpath "E:Program FilesJetBrainsIntelliJ IDEA 2017.2.1libidea_rt.jar;E:Program FilesJetBrainsIntelliJ IDEA 2017.2.1pluginsjunitlibjunit-rt.jar;E:Program FilesJetBrainsIntelliJ IDEA 2017.2.1pluginsjunitlibjunit5-rt.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibcharsets.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibdeploy.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextaccess-bridge-32.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextcldrdata.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextdnsns.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextjaccess.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextjfxrt.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextlocaledata.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibext ashorn.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextsunec.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextsunjce_provider.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextsunmscapi.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextsunpkcs11.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibextzipfs.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibjavaws.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibjce.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibjfr.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibjfxswt.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibjsse.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibmanagement-agent.jar;C:Program Files (x86)Javajdk1.8.0_131jrelibplugin.jar;C:Program Files (x86)Javajdk1.8.0_131jrelib esources.jar;C:Program Files (x86)Javajdk1.8.0_131jrelib t.jar;E:WorkSpacesIdeaProjectAnnotation3 arget est-classes;E:WorkSpacesIdeaProjectAnnotation3 argetclasses;D: oolsmavenapache-maven-3.5.0 epositoryjunitjunit4.12junit-4.12.jar;D: oolsmavenapache-maven-3.5.0 epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;D: oolsmavenapache-maven-3.5.0 epositoryorghibernatehibernate-core5.2.11.Finalhibernate-core-5.2.11.Final.jar;D: oolsmavenapache-maven-3.5.0 epositoryorgjbossloggingjboss-logging3.3.0.Finaljboss-logging-3.3.0.Final.jar;D: oolsmavenapache-maven-3.5.0 epositoryorghibernatejavaxpersistencehibernate-jpa-2.1-api1.0.0.Finalhibernate-jpa-2.1-api-1.0.0.Final.jar;D: oolsmavenapache-maven-3.5.0 epositoryorgjavassistjavassist3.20.0-GAjavassist-3.20.0-GA.jar;D: oolsmavenapache-maven-3.5.0 epositoryantlrantlr2.7.7antlr-2.7.7.jar;D: oolsmavenapache-maven-3.5.0 epositoryorgjbossspecjavax ransactionjboss-transaction-api_1.2_spec1.0.1.Finaljboss-transaction-api_1.2_spec-1.0.1.Final.jar;D: oolsmavenapache-maven-3.5.0 epositoryorgjbossjandex2.0.3.Finaljandex-2.0.3.Final.jar;D: oolsmavenapache-maven-3.5.0 epositorycomfasterxmlclassmate1.3.0classmate-1.3.0.jar;D: oolsmavenapache-maven-3.5.0 epositorydom4jdom4j1.6.1dom4j-1.6.1.jar;D: oolsmavenapache-maven-3.5.0 epositoryorghibernatecommonhibernate-commons-annotations5.0.1.Finalhibernate-commons-annotations-5.0.1.Final.jar;D: oolsmavenapache-maven-3.5.0 epositorymysqlmysql-connector-java5.1.42mysql-connector-java-5.1.42.jar" com.intellij.rt.execution.junit.JUnitStarter -ideVersion5 -junit4 com.yztc.test.TestOneToOne
十月 13, 2017 7:28:09 下午 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.2.11.Final}
十月 13, 2017 7:28:09 下午 org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
十月 13, 2017 7:28:10 下午 org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
十月 13, 2017 7:28:10 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)
十月 13, 2017 7:28:10 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001005: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql:///hibernate2?useUnicode=true&characterEncoding=UTF-8]
十月 13, 2017 7:28:10 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001001: Connection properties: {user=root, password=****}
十月 13, 2017 7:28:10 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001003: Autocommit mode: false
十月 13, 2017 7:28:10 下午 org.hibernate.engine.jdbc.connections.internal.PooledConnections <init>
INFO: HHH000115: Hibernate connection pool size: 20 (min=1)
十月 13, 2017 7:28:10 下午 org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQL55Dialect
十月 13, 2017 7:28:10 下午 org.hibernate.id.UUIDHexGenerator <init>
WARN: HHH000409: Using org.hibernate.id.UUIDHexGenerator which does not generate IETF RFC 4122 compliant UUID values; consider using org.hibernate.id.UUIDGenerator instead
十月 13, 2017 7:28:11 下午 org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection
INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@1b2d00b] for (non-JTA) DDL execution was not in auto-commit mode; the Connection 'local transaction' will be committed and the Connection will be set into auto-commit mode.
Hibernate:

alter table TB_ADDRESS
drop
foreign key FK7stsktyes1d808a36kv9wlq0s
Hibernate:

drop table if exists TB_ADDRESS
Hibernate:

drop table if exists TB_USERR
Hibernate:

create table TB_ADDRESS (
ADD_ID varchar(32) not null,
name varchar(255),
USER_ID varchar(32),
primary key (ADD_ID)
) engine=InnoDB
十月 13, 2017 7:28:11 下午 org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection
INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@15a0c16] for (non-JTA) DDL execution was not in auto-commit mode; the Connection 'local transaction' will be committed and the Connection will be set into auto-commit mode.
Hibernate:

create table TB_USERR (
USER_ID varchar(32) not null,
NAME varchar(64),
PRICE decimal(8,2),
primary key (USER_ID)
) engine=InnoDB
Hibernate:

alter table TB_ADDRESS
add constraint FK7stsktyes1d808a36kv9wlq0s
foreign key (USER_ID)
references TB_USERR (USER_ID)
十月 13, 2017 7:28:11 下午 org.hibernate.tool.schema.internal.SchemaCreatorImpl applyImportSources
INFO: HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl@16f8274'
Hibernate:
insert
into
TB_USERR
(NAME, PRICE, USER_ID)
values
(?, ?, ?)
Hibernate:
insert
into
TB_ADDRESS
(name, USER_ID, ADD_ID)
values
(?, ?, ?)

Process finished with exit code 0

七.表结构: