双向-外键关联
Posted 友情天
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一.首先建立工程
二.导入hibernate核心包和mysql-connection包,代码如下:
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>com.yztc</groupId> 5 <artifactId>annotation3</artifactId> 6 <packaging>war</packaging> 7 <version>1.0-SNAPSHOT</version> 8 <name>annotation3 Maven Webapp</name> 9 <url>http://maven.apache.org</url> 10 <dependencies> 11 <dependency> 12 <groupId>junit</groupId> 13 <artifactId>junit</artifactId> 14 <version>4.12</version> 15 <scope>test</scope> 16 </dependency> 17 <dependency> 18 <groupId>org.hibernate</groupId> 19 <artifactId>hibernate-core</artifactId> 20 <version>5.2.11.Final</version> 21 </dependency> 22 <dependency> 23 <groupId>mysql</groupId> 24 <artifactId>mysql-connector-java</artifactId> 25 <version>5.1.42</version> 26 </dependency> 27 </dependencies> 28 <build> 29 <finalName>annotation3</finalName> 30 </build> 31 </project>
三.配置hibernate.cfg.xml文档,代码如下:
1 <?xml version=\'1.0\' encoding=\'UTF-8\'?> 2 <!DOCTYPE hibernate-configuration PUBLIC 3 "-//Hibernate/Hibernate Configuration DTD//EN" 4 "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> 5 <hibernate-configuration> 6 <session-factory> 7 <!--数据库连接url配置--> 8 <property name="connection.url">jdbc:mysql:///hibernate2?useUnicode=true&characterEncoding=UTF-8</property> 9 <!--数据库驱动配置--> 10 <property name="connection.driver_class">com.mysql.jdbc.Driver</property> 11 <!--数据库用户名配置--> 12 <property name="connection.username">root</property> 13 <!--数据库密码配置--> 14 <property name="connection.password">ROOT</property> 15 <!-- 方言属性：这个是实现跨数据库关键类 具体查询api--> 16 <property name="dialect">org.hibernate.dialect.MySQL55Dialect</property> 17 <!-- 是否显示sql --> 18 <property name="show_sql">true</property> 19 <!--是否格式化SQL语句--> 20 <property name="format_sql">true</property> 21 <!--是否自动生成表：可选用create update create-drop validate--> 22 <property name="hbm2ddl.auto">create</property> 23 <mapping class="com.yztc.app.entity.Address"/> 24 <mapping class="com.yztc.app.entity.User"/> 25 </session-factory> 26 </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:
1 package com.yztc.app.entity; 2 3 import org.hibernate.annotations.GenericGenerator; 4 5 import javax.persistence.*; 6 import java.math.BigDecimal; 7 8 /** 9 * 一对一 10 * 单向 主键关联 单向外键关联 11 * 双向 外键关联 12 * 13 */ 14 15 @Entity 16 @Table(name = "TB_USERR") 17 public class User { 18 @Id 19 @Column(name = "USER_ID",length = 32) 20 @GeneratedValue(generator = "uuuid_generator")//generator 主键生成器 21 @GenericGenerator(name ="uuuid_generator",strategy = "uuid")//strategy 注解生成器 22 private String userId; 23 @Column(name = "NAME",length = 64) 24 private String name; 25 @Column(name = "PRICE",precision = 8,scale = 2) 26 private BigDecimal price; 27 @Transient 28 private int state; 29 @OneToOne(cascade = CascadeType.ALL) 30 @PrimaryKeyJoinColumn 31 private Address address; 32 33 public int getState() { 34 return state; 35 } 36 37 public void setState(int state) { 38 this.state = state; 39 } 40 41 42 public BigDecimal getPrice() { 43 return price; 44 } 45 46 public void setPrice(BigDecimal price) { 47 this.price = price; 48 } 49 50 public Address getAddress() { 51 return address; 52 } 53 54 public void setAddress(Address address) { 55 this.address = address; 56 } 57 58 public String getUserId() { 59 return userId; 60 } 61 62 public void setUserId(String userId) { 63 this.userId = userId; 64 } 65 66 public String getName() { 67 return name; 68 } 69 70 public void setName(String name) { 71 this.name = name; 72 } 73 74 public User() { 75 } 76 }
1 package com.yztc.app.entity; 2 3 import org.hibernate.annotations.GenericGenerator; 4 import javax.persistence.*; 5 6 @Entity 7 @Table(name = "TB_ADDRESS") 8 public class Address { 9 @Id 10 @Column(name = "ADD_ID",length = 32) 11 @GeneratedValue(generator = "uuid") 12 @GenericGenerator(name = "uuid" ,strategy = "uuid") 13 private String addId; 14 @Column() 15 private String name; 16 @OneToOne(cascade = CascadeType.ALL) 17 @JoinColumn(name = "USER_ID")//表示 外键的名称 18 private User user; 19 20 public User getUser() { 21 return user; 22 } 23 24 public void setUser(User user) { 25 this.user = user; 26 } 27 28 public String getAddId() { 29 return addId; 30 } 31 32 public void setAddId(String addId) { 33 this.addId = addId; 34 } 35 36 public String getName() { 37 return name; 38 } 39 40 public void setName(String name) { 41 this.name = name; 42 } 43 }
五.测试类,进行测试,代码如下:
1 package com.yztc.test; 2 3 import com.yztc.app.entity.Address; 4 import com.yztc.app.entity.User; 5 import org.hibernate.Session; 6 import org.hibernate.SessionFactory; 7 import org.hibernate.Transaction; 8 import org.hibernate.cfg.Configuration; 9 import org.junit.After; 10 import org.junit.Before; 11 import org.junit.Test; 12 13 public class TestOneToOne { 14 15 private SessionFactory sf; 16 private Session session; 17 18 @Before 19 public void init(){ 20 sf = new Configuration().configure().buildSessionFactory(); 21 session = sf.openSession(); 22 23 } 24 @Test 25 public void testSave(){ 26 Transaction transaction = session.beginTransaction(); 27 28 User user = new User(); 29 user.setName("用户1"); 30 Address address = new Address(); 31 address.setName("深圳"); 32 address.setUser(user); 33 user.setAddress(address); 34 session.save(user); 35 transaction.commit(); 36 37 38 } 39 @After 40 public void destory(){ 41 session.close(); 42 } 43 }
六.测试结果:
"C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\bin\\java" -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:E:\\Program Files\\JetBrains\\IntelliJ IDEA 2017.2.1\\lib\\idea_rt.jar=56973:E:\\Program Files\\JetBrains\\IntelliJ IDEA 2017.2.1\\bin" -Dfile.encoding=UTF-8 -classpath "E:\\Program Files\\JetBrains\\IntelliJ IDEA 2017.2.1\\lib\\idea_rt.jar;E:\\Program Files\\JetBrains\\IntelliJ IDEA 2017.2.1\\plugins\\junit\\lib\\junit-rt.jar;E:\\Program Files\\JetBrains\\IntelliJ IDEA 2017.2.1\\plugins\\junit\\lib\\junit5-rt.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\charsets.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\deploy.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\access-bridge-32.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\cldrdata.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\dnsns.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\jaccess.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\jfxrt.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\localedata.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\nashorn.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\sunec.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\sunjce_provider.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\sunmscapi.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\sunpkcs11.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\ext\\zipfs.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\javaws.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\jce.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\jfr.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\jfxswt.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\jsse.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\management-agent.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\plugin.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\resources.jar;C:\\Program Files (x86)\\Java\\jdk1.8.0_131\\jre\\lib\\rt.jar;E:\\WorkSpaces\\IdeaProject\\Annotation3\\target\\test-classes;E:\\WorkSpaces\\IdeaProject\\Annotation3\\target\\classes;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\junit\\junit\\4.12\\junit-4.12.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\org\\hamcrest\\hamcrest-core\\1.3\\hamcrest-core-1.3.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\org\\hibernate\\hibernate-core\\5.2.11.Final\\hibernate-core-5.2.11.Final.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\org\\jboss\\logging\\jboss-logging\\3.3.0.Final\\jboss-logging-3.3.0.Final.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\org\\hibernate\\javax\\persistence\\hibernate-jpa-2.1-api\\1.0.0.Final\\hibernate-jpa-2.1-api-1.0.0.Final.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\org\\javassist\\javassist\\3.20.0-GA\\javassist-3.20.0-GA.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\antlr\\antlr\\2.7.7\\antlr-2.7.7.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\org\\jboss\\spec\\javax\\transaction\\jboss-transaction-api_1.2_spec\\1.0.1.Final\\jboss-transaction-api_1.2_spec-1.0.1.Final.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\org\\jboss\\jandex\\2.0.3.Final\\jandex-2.0.3.Final.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\com\\fasterxml\\classmate\\1.3.0\\classmate-1.3.0.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\dom4j\\dom4j\\1.6.1\\dom4j-1.6.1.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\org\\hibernate\\common\\hibernate-commons-annotations\\5.0.1.Final\\hibernate-commons-annotations-5.0.1.Final.jar;D:\\tools\\maven\\apache-maven-3.5.0\\repository\\mysql\\mysql-connector-java\\5.1.42\\mysql-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:
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