SpringBoot2.x SpringDataJpa多数据源配置及使用
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2022-04-13 15:59:17
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SpringDataJpa使用单数据源时的SpringBoot配置很简单,但是随着业务量发展,单个数据库可能不能满足我们的业务需求,这时候一般会对数据库进行拆分或引入其他数据库,此时单数据源就不能满足我们的需求,需要配置多个数据源。
在使用SpringBoot2.x进行SpringDataJpa多数据源配置之前,对SpringBoot2.x集成SpringDataJpa还不熟悉的朋友,可以先参考SpringBoot2.x 集成 SpringDataJpa。下面就开始进行SpringDataJpa多数据源配置及使用,其中SpringBoot使用的2.2.2.RELEASE
版本,添加依赖在这里就不再表述了。
一.编写配置文件
在application.yml
里进行如下配置:
spring:
#多数据源数据库连接配置
datasource:
#第一数据源配置
primary:
jdbc-url: jdbc:mysql://127.0.0.1:3306/test1?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true
driver-class-name: com.mysql.cj.jdbc.Driver
username: root
password: root
#第二数据源配置
secondary:
jdbc-url: jdbc:mysql://127.0.0.1:3306/test2?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true
driver-class-name: com.mysql.cj.jdbc.Driver
username: root
password: root
#jpa相关配置
jpa:
database: mysql
show-sql: true
generate-ddl: true
hibernate:
ddl-auto: update
database-platform: org.hibernate.dialect.MySQL5InnoDBDialect
二.编写多数据源的配置类
1.多数据源配置类
package com.rtxtitanv.config;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateSettings;
import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import javax.annotation.Resource;
import javax.sql.DataSource;
import java.util.Map;
/**
* @author rtxtitanv
* @version v1.0.0
* @name com.rtxtitanv.config.DataSourceConfig
* @description 多数据源配置类
* @date 2020/1/7 19:19
*/
@Configuration
public class DataSourceConfig {
@Resource
private JpaProperties jpaProperties;
@Resource
private HibernateProperties hibernateProperties;
/**
* 配置第一数据源
* @return 数据源
*/
@Bean(name = "primaryDataSource")
@Primary //标识为主数据源
//prefix:指定yml配置文件中配置项的前缀
@ConfigurationProperties(prefix = "spring.datasource.primary")
public DataSource primaryDataSource() {
//这种方式默认只满足spring的配置方式,如果使用其他数据库连接池,需独立获取配置
return DataSourceBuilder.create().build();
}
/**
* 配置第二数据源
* @return 数据源
*/
@Bean(name = "secondaryDataSource")
@ConfigurationProperties(prefix = "spring.datasource.secondary")
public DataSource secondaryDataSource() {
return DataSourceBuilder.create().build();
}
/**
* 配置 组合jpaProperties和hibernateProperties配置的map对象
* @return 组合jpaProperties和hibernateProperties配置的map
*/
@Bean(name = "vendorProperties")
public Map<String, Object> getVendorProperties() {
return hibernateProperties.determineHibernateProperties(jpaProperties.getProperties(), new HibernateSettings());
}
}
2.第一数据源配置类
package com.rtxtitanv.config;
import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.annotation.Resource;
import javax.persistence.EntityManager;
import javax.sql.DataSource;
import java.util.Map;
/**
* @author rtxtitanv
* @version v1.0.0
* @name com.rtxtitanv.config.PrimaryConfig
* @description 第一数据源配置类
* @date 2020/1/7 19:21
*/
@Configuration
@EnableTransactionManagement
//entityManagerFactoryRef:指定实体管理器工厂,transactionManagerRef:指定事务管理器
//basePackages:指定该数据源的repository所在包路径
@EnableJpaRepositories(entityManagerFactoryRef = "entityManagerFactoryPrimary",
transactionManagerRef = "transactionManagerPrimary",
basePackages = {"com.rtxtitanv.repository.primary"})
public class PrimaryConfig {
@Resource(name = "primaryDataSource")
private DataSource primaryDataSource;
@Resource(name = "vendorProperties")
private Map<String, Object> vendorProperties;
/**
* 配置第一数据源实体管理工厂的bean
* @param builder EntityManagerFactoryBuilder
* @return LocalContainerEntityManagerFactoryBean
*/
@Bean(name = "entityManagerFactoryPrimary")
@Primary //标识为主数据源(主库对应的数据源)
public LocalContainerEntityManagerFactoryBean entityManagerFactoryPrimary(EntityManagerFactoryBuilder builder) {
return builder.dataSource(primaryDataSource)
//指定组合jpaProperties和hibernateProperties配置的map对象
.properties(vendorProperties)
//指定该数据源的实体类所在包路径
.packages("com.rtxtitanv.model.primary")
.persistenceUnit("primaryPersistenceUnit")
.build();
}
/**
* 配置第一数据源实体管理器
* @param builder EntityManagerFactoryBuilder
* @return EntityManager
*/
@Bean(name = "entityManagerPrimary")
@Primary
public EntityManager entityManagerPrimary(EntityManagerFactoryBuilder builder) {
return entityManagerFactoryPrimary(builder).getObject().createEntityManager();
}
/**
* 配置第一数据源事务管理器
* @param builder EntityManagerFactoryBuilder
* @return PlatformTransactionManager
*/
@Bean(name = "transactionManagerPrimary")
@Primary
public PlatformTransactionManager transactionManagerPrimary(EntityManagerFactoryBuilder builder) {
return new JpaTransactionManager(entityManagerFactoryPrimary(builder).getObject());
}
}
3.第二数据源配置类
package com.rtxtitanv.config;
import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.annotation.Resource;
import javax.persistence.EntityManager;
import javax.sql.DataSource;
import java.util.Map;
/**
* @author rtxtitanv
* @version v1.0.0
* @name com.rtxtitanv.config.SecondaryConfig
* @description 第二数据源配置类
* @date 2020/1/7 19:21
*/
@Configuration
@EnableTransactionManagement
//entityManagerFactoryRef:指定实体管理器工厂,transactionManagerRef:指定事务管理器
//basePackages:指定该数据源的repository所在包路径
@EnableJpaRepositories(entityManagerFactoryRef = "entityManagerFactorySecondary",
transactionManagerRef = "transactionManagerSecondary",
basePackages = {"com.rtxtitanv.repository.secondary"})
public class SecondaryConfig {
@Resource(name = "secondaryDataSource")
private DataSource secondaryDataSource;
@Resource(name = "vendorProperties")
private Map<String, Object> vendorProperties;
/**
* 配置第二数据源实体管理工厂的bean
* @param builder EntityManagerFactoryBuilder
* @return LocalContainerEntityManagerFactoryBean
*/
@Bean(name = "entityManagerFactorySecondary")
public LocalContainerEntityManagerFactoryBean entityManagerFactorySecondary(EntityManagerFactoryBuilder builder) {
return builder.dataSource(secondaryDataSource)
//指定组合jpaProperties和hibernateProperties配置的map对象
.properties(vendorProperties)
//指定该数据源的实体类所在包路径
.packages("com.rtxtitanv.model.secondary")
.persistenceUnit("secondaryPersistenceUnit")
.build();
}
/**
* 配置第二数据源实体管理器
* @param builder EntityManagerFactoryBuilder
* @return EntityManager
*/
@Bean(name = "entityManagerSecondary")
public EntityManager entityManagerSecondary(EntityManagerFactoryBuilder builder) {
return entityManagerFactorySecondary(builder).getObject().createEntityManager();
}
/**
* 配置第二数据源事务管理器
* @param builder EntityManagerFactoryBuilder
* @return PlatformTransactionManager
*/
@Bean(name = "transactionManagerSecondary")
public PlatformTransactionManager transactionManagerSecondary(EntityManagerFactoryBuilder builder) {
return new JpaTransactionManager(entityManagerFactorySecondary(builder).getObject());
}
}
三.创建实体类和Repository
1.主数据库实体类和Repository
主数据库实体类
package com.rtxtitanv.model.primary;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
import javax.persistence.*;
/**
* @author rtxtitanv
* @version v1.0.0
* @name com.rtxtitanv.model.primary.PrimaryUser
* @description 主数据库用户实体类
* @date 2020/1/7 19:31
*/
@Accessors(chain = true)
@AllArgsConstructor
@NoArgsConstructor
@Data
@Entity
@Table(name = "user")
public class PrimaryUser {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private Long id;
@Column(name = "user_name")
private String userName;
@Column(name = "pass_word")
private String passWord;
@Column(name = "nick_name")
private String nickName;
@Column(name = "age")
private Integer age;
@Column(name = "email")
private String email;
@Column(name = "tel")
private String tel;
}
主数据库Repository
/**
* @author rtxtitanv
* @version v1.0.0
* @name com.rtxtitanv.repository.primary.PrimaryUserRepository
* @description PrimaryUserRepository接口用于操作主库用户表
* @date 2020/1/7 19:34
*/
public interface PrimaryUserRepository extends JpaRepository<PrimaryUser, Long>, JpaSpecificationExecutor<PrimaryUser> {
}
2.从数据库实体类和Repository
从数据库实体类
package com.rtxtitanv.model.secondary;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
import javax.persistence.*;
/**
* @author rtxtitanv
* @version v1.0.0
* @name com.rtxtitanv.model.secondary.SecondaryUser
* @description 从数据库用户实体类
* @date 2020/1/7 19:32
*/
@Accessors(chain = true)
@AllArgsConstructor
@NoArgsConstructor
@Data
@Entity
@Table(name = "user")
public class SecondaryUser {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private Long id;
@Column(name = "user_name")
private String userName;
@Column(name = "pass_word")
private String passWord;
@Column(name = "nick_name")
private String nickName;
@Column(name = "age")
private Integer age;
@Column(name = "email")
private String email;
@Column(name = "tel")
private String tel;
}
从数据库Repository
/**
* @author rtxtitanv
* @version v1.0.0
* @name com.rtxtitanv.repository.secondary.SecondaryUserRepository
* @description SecondaryUserRepository用于操作从库用户表
* @date 2020/1/7 19:37
*/
public interface SecondaryUserRepository extends JpaRepository<SecondaryUser, Long>, JpaSpecificationExecutor<SecondaryUser> {
}
四.使用测试
package com.rtxtitanv;
import com.rtxtitanv.model.primary.PrimaryUser;
import com.rtxtitanv.model.secondary.SecondaryUser;
import com.rtxtitanv.repository.primary.PrimaryUserRepository;
import com.rtxtitanv.repository.secondary.SecondaryUserRepository;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.List;
import java.util.Optional;
/**
* @author rtxtitanv
* @version v1.0.0
* @name com.rtxtitanv.JpaMultiTest
* @description SpringDataJpa多数据源测试类
* @date 2020/1/7 18:22
*/
@RunWith(SpringRunner.class)
@SpringBootTest(classes = JpaMultiApplication.class)
public class JpaMultiTest {
@Autowired
private PrimaryUserRepository primaryUserRepository;
@Autowired
private SecondaryUserRepository secondaryUserRepository;
private static Logger logger = LoggerFactory.getLogger(JpaMultiTest.class);
/**
* 多数据源保存测试
*/
@Test
public void saveTest() {
primaryUserRepository.save(new PrimaryUser(null, "aaa", "123456", "aaa", 20, "[email protected]", "13598766131"));
primaryUserRepository.save(new PrimaryUser(null, "bbb", "123123", "bbb", 22, "[email protected]", "13659836782"));
primaryUserRepository.save(new PrimaryUser(null, "ccc", "111111", "ccc", 25, "[email protected]", "18965233695"));
secondaryUserRepository.save(new SecondaryUser(null, "ddd", "2356890", "ccc", 18, "[email protected]", "13678922986"));
secondaryUserRepository.save(new SecondaryUser(null, "eee", "124678", "bbb", 25, "[email protected]", "13669876321"));
secondaryUserRepository.save(new SecondaryUser(null, "fff", "112233567", "aaa", 22, "[email protected]", "19862398732"));
}
/**
* 多数据源查询测试
*/
@Test
public void findTest() {
logger.info("查询主库user表测试开始");
List<PrimaryUser> primaryUsers = primaryUserRepository.findAll();
if (primaryUsers.isEmpty()) {
logger.info("主库user表不存在数据");
} else {
primaryUsers.forEach(primaryUser -> logger.info(primaryUser.toString()));
}
logger.info("查询主库user表测试结束");
logger.info("查询从库user表测试开始");
List<SecondaryUser> secondaryUsers = secondaryUserRepository.findAll();
if (secondaryUsers.isEmpty()) {
logger.info("从库user表不存在数据");
} else {
secondaryUsers.forEach(secondaryUser -> logger.info(secondaryUser.toString()));
}
logger.info("查询从库user表测试结束");
}
/**
* 多数据源更新测试
*/
@Test
public void updateTest() {
Optional<PrimaryUser> user = primaryUserRepository.findById(1L);
if (!user.isPresent()) {
logger.info("用户不存在");
} else {
PrimaryUser primaryUser = user.get().setUserName("ddd").setNickName("ddd").setEmail("[email protected]");
primaryUserRepository.save(primaryUser);
}
Optional<SecondaryUser> user1 = secondaryUserRepository.findById(1L);
if (!user1.isPresent()) {
logger.info("用户记录不存在");
} else {
SecondaryUser secondaryUser = user1.get().setUserName("aaa").setNickName("aaa").setEmail("[email protected]");
secondaryUserRepository.save(secondaryUser);
}
}
/**
* 多数据源删除测试
*/
@Test
public void deleteTest() {
//primaryUserRepository.deleteById(1L);
//secondaryUserRepository.deleteById(3L);
primaryUserRepository.deleteAllInBatch();
secondaryUserRepository.deleteAllInBatch();
}
}
主启动类启动后,test1(主库)和test2(从库)都自动创建了一张user表,暂无数据。
执行保存测试方法后两张表的结果:
执行简单的查询测试后控制台打印的日志和自动生成的sql如下:
2020-01-08 16:38:14.342 INFO 10720 --- [ main] com.rtxtitanv.JpaMultiTest : 查询主库user表测试开始
Hibernate: select primaryuse0_.id as id1_0_, primaryuse0_.age as age2_0_, primaryuse0_.email as email3_0_, primaryuse0_.nick_name as nick_nam4_0_, primaryuse0_.pass_word as pass_wor5_0_, primaryuse0_.tel as tel6_0_, primaryuse0_.user_name as user_nam7_0_ from user primaryuse0_
2020-01-08 16:38:14.487 INFO 10720 --- [ main] com.rtxtitanv.JpaMultiTest : PrimaryUser(id=1, userName=aaa, passWord=123456, nickName=aaa, age=20, [email protected], tel=13598766131)
2020-01-08 16:38:14.487 INFO 10720 --- [ main] com.rtxtitanv.JpaMultiTest : PrimaryUser(id=2, userName=bbb, passWord=123123, nickName=bbb, age=22, [email protected], tel=13659836782)
2020-01-08 16:38:14.487 INFO 10720 --- [ main] com.rtxtitanv.JpaMultiTest : PrimaryUser(id=3, userName=ccc, passWord=111111, nickName=ccc, age=25, [email protected], tel=18965233695)
2020-01-08 16:38:14.487 INFO 10720 --- [ main] com.rtxtitanv.JpaMultiTest : 查询主库user表测试结束
2020-01-08 16:38:14.487 INFO 10720 --- [ main] com.rtxtitanv.JpaMultiTest : 查询从库user表测试开始
Hibernate: select secondaryu0_.id as id1_0_, secondaryu0_.age as age2_0_, secondaryu0_.email as email3_0_, secondaryu0_.nick_name as nick_nam4_0_, secondaryu0_.pass_word as pass_wor5_0_, secondaryu0_.tel as tel6_0_, secondaryu0_.user_name as user_nam7_0_ from user secondaryu0_
2020-01-08 16:38:14.492 INFO 10720 --- [ main] com.rtxtitanv.JpaMultiTest : SecondaryUser(id=1, userName=ddd, passWord=2356890, nickName=ccc, age=18, [email protected], tel=13678922986)
2020-01-08 16:38:14.492 INFO 10720 --- [ main] com.rtxtitanv.JpaMultiTest : SecondaryUser(id=2, userName=eee, passWord=124678, nickName=bbb, age=25, [email protected], tel=13669876321)
2020-01-08 16:38:14.492 INFO 10720 --- [ main] com.rtxtitanv.JpaMultiTest : SecondaryUser(id=3, userName=fff, passWord=112233567, nickName=aaa, age=22, [email protected], tel=19862398732)
2020-01-08 16:38:14.493 INFO 10720 --- [ main] com.rtxtitanv.JpaMultiTest : 查询从库user表测试结束
执行更新测试后控制台打印的sql语句如下,刷新两张表后查看更新成功。
Hibernate: select primaryuse0_.id as id1_0_0_, primaryuse0_.age as age2_0_0_, primaryuse0_.email as email3_0_0_, primaryuse0_.nick_name as nick_nam4_0_0_, primaryuse0_.pass_word as pass_wor5_0_0_, primaryuse0_.tel as tel6_0_0_, primaryuse0_.user_name as user_nam7_0_0_ from user primaryuse0_ where primaryuse0_.id=?
Hibernate: select primaryuse0_.id as id1_0_0_, primaryuse0_.age as age2_0_0_, primaryuse0_.email as email3_0_0_, primaryuse0_.nick_name as nick_nam4_0_0_, primaryuse0_.pass_word as pass_wor5_0_0_, primaryuse0_.tel as tel6_0_0_, primaryuse0_.user_name as user_nam7_0_0_ from user primaryuse0_ where primaryuse0_.id=?
Hibernate: update user set age=?, email=?, nick_name=?, pass_word=?, tel=?, user_name=? where id=?
Hibernate: select secondaryu0_.id as id1_0_0_, secondaryu0_.age as age2_0_0_, secondaryu0_.email as email3_0_0_, secondaryu0_.nick_name as nick_nam4_0_0_, secondaryu0_.pass_word as pass_wor5_0_0_, secondaryu0_.tel as tel6_0_0_, secondaryu0_.user_name as user_nam7_0_0_ from user secondaryu0_ where secondaryu0_.id=?
Hibernate: select secondaryu0_.id as id1_0_0_, secondaryu0_.age as age2_0_0_, secondaryu0_.email as email3_0_0_, secondaryu0_.nick_name as nick_nam4_0_0_, secondaryu0_.pass_word as pass_wor5_0_0_, secondaryu0_.tel as tel6_0_0_, secondaryu0_.user_name as user_nam7_0_0_ from user secondaryu0_ where secondaryu0_.id=?
Hibernate: update user set age=?, email=?, nick_name=?, pass_word=?, tel=?, user_name=? where id=?
执行删除测试后控制台打印的sql语句如下,刷新两张表查看删除成功。
按id删除:
Hibernate: select primaryuse0_.id as id1_0_0_, primaryuse0_.age as age2_0_0_, primaryuse0_.email as email3_0_0_, primaryuse0_.nick_name as nick_nam4_0_0_, primaryuse0_.pass_word as pass_wor5_0_0_, primaryuse0_.tel as tel6_0_0_, primaryuse0_.user_name as user_nam7_0_0_ from user primaryuse0_ where primaryuse0_.id=?
Hibernate: delete from user where id=?
Hibernate: select secondaryu0_.id as id1_0_0_, secondaryu0_.age as age2_0_0_, secondaryu0_.email as email3_0_0_, secondaryu0_.nick_name as nick_nam4_0_0_, secondaryu0_.pass_word as pass_wor5_0_0_, secondaryu0_.tel as tel6_0_0_, secondaryu0_.user_name as user_nam7_0_0_ from user secondaryu0_ where secondaryu0_.id=?
Hibernate: delete from user where id=?
删除所有:
Hibernate: delete from user
Hibernate: delete from user
代码示例