这篇文章主要介绍“SpringBoot+Jpa项目配置双数据源怎么实现”,在日常操作中,相信很多人在SpringBoot+Jpa项目配置双数据源怎么实现问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”SpringBoot+Jpa项目配置双数据源怎么实现”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
server: port: 8080 spring: profiles: active: dev jackson: time-zone: GMT+8 # 这里是我们的数据库配置地方 datasource: data1: #这里是数据库一 driverClassName: com.mysql.cj.jdbc.Driver url: jdbc:mysql://192.168.0.77:3306/test1?characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&autoReconnect=true&failOverReadOnly=false&rewriteBatchedStatements=true username: root password: 123 type: com.alibaba.druid.pool.DruidDataSource data2: #这里是数据库二 driverClassName: com.mysql.cj.jdbc.Driver url: jdbc:mysql://192.168.0.88:3306/test2?characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&autoReconnect=true&failOverReadOnly=false&rewriteBatchedStatements=true username: root password: 123 type: com.alibaba.druid.pool.DruidDataSource
当然到这里肯定是没有结束的,需要配置一些参数,否则启动会报错
我们创建一个数据源的类,我们就给他取名为DataSourceConfig(这个名字自定义),在项目下创建一个包,方便管理
package com.eman.cdn.common.dataSource; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.boot.autoconfigure.ImportAutoConfiguration; import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Primary; import javax.sql.DataSource; /** * @author https://blog.csdn.net/weixin_42782429?spm=1000.2115.3001.5343 * @date 2021/12/21 11:35 * <p> * description 数据源配置 */ @Configuration public class DataSourceConfig { # 这里是我们在yml文件配置的位置 private final static String DB_TEST1 = "spring.datasource.test1"; private final static String DB_TEST2= "spring.datasource.test1"; # 这个Bean名字子自定义只要不是重复的Bean名字就行了 @Bean(name = "test1Properties") @Qualifier("test1Properties") @Primary @ConfigurationProperties(DB_TEST1) public DataSourceProperties test1Properties() { return new DataSourceProperties(); } @Bean(name = "test1DataSource") @Qualifier("test1DataSource") @Primary @ConfigurationProperties(prefix = DB_TEST1) public DataSource test1DataSource() { return test1Properties().initializeDataSourceBuilder().build(); } @Bean(name = "test2Properties") @Qualifier("test2Properties") @ConfigurationProperties(DB_TEST2) public DataSourceProperties test2Properties() { return new DataSourceProperties(); } @Bean(name = "test2DataSource") @Qualifier("test2DataSource") @ConfigurationProperties(prefix = DB_ANALYSIS) public DataSource test2DataSource() { return test2Properties().initializeDataSourceBuilder().build(); } }
由于需要用到Mybaitis-plus所以你得先导入Mybaitis-Plus的依赖
<!--mybatis-plus--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.1.0</version> </dependency>
package com.eman.xx.xxx.xx; import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionTemplate; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; 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.orm.jpa.EntityManagerFactoryBuilder; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; 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.sql.DataSource; import java.util.Objects; /** * @author tongJie * @date 2021/12/21 11:59 * <p> * description 日志处理端数据库配置 */ @Configuration @EnableTransactionManagement @EnableJpaRepositories( // 配置连接工厂 entityManagerFactoryRef = "tes1Factory", // 配置事物管理器 transactionManagerRef = "tes1Transaction", // 设置Jpa 的 repository所在位置 basePackages = {"com.xx.xx.xx.**.repository"} ) // 设置扫描的mapper @MapperScan(basePackages ="xx.xx.xx.test1.**.mapper", sqlSessionTemplateRef = "tes1SqlSessionTemplate") public class AnalysisDataBaseConfig { @Autowired @Qualifier("tes1DataSource") private DataSource analysisDataSource; @Autowired private JpaProperties jpaProperties; @Autowired private HibernateProperties properties; // 以下是jpa的配置 /** * 连接工厂 * @param builder 创建工具 * @return 结果 */ @Bean(name = "tes1Factory") public LocalContainerEntityManagerFactoryBean tes1Factory(EntityManagerFactoryBuilder builder) { return builder // 设置数据源 .dataSource(analysisDataSource) //设置实体类所在位置.扫描所有带有 @Entity 注解的类 .packages("xx.xx.xx.tes1.**.entity") // Spring会将EntityManagerFactory注入到Repository之中.有了 EntityManagerFactory之后, // Repository就能用它来创建 EntityManager 了,然后 EntityManager 就可以针对数据库执行操作 .persistenceUnit("tes1") // 为了加载yml中jpa下hibernate的相关配置 .properties(properties.determineHibernateProperties(jpaProperties.getProperties(), new HibernateSettings())) .build(); } /** * 配置事物管理器 * * @param builder 创建工具 * @return 结果 */ @Bean(name = "tes1Transaction") PlatformTransactionManager tes1Transaction(EntityManagerFactoryBuilder builder) { return new JpaTransactionManager(Objects.requireNonNull(analysisFactory(builder).getObject())); } // 以下是mybatis的配置 /** * 配置sqlSessionFactory * @return 结果 * @throws Exception 异常 */ @Bean("tes1SqlSessionFactory") public SqlSessionFactory tes1SqlSessionFactory() throws Exception { MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean(); sqlSessionFactory.setDataSource(analysisDataSource); sqlSessionFactory.setMapperLocations(new //这里填写你mybaits的xml文件存放的路径 PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/*.xml")); return sqlSessionFactory.getObject(); } /** * 配置sqlSessionTemplate * @return 结果 */ @Bean(name = "tes1SqlSessionTemplate") public SqlSessionTemplate tes1SqlSessionTemplate() throws Exception { return new SqlSessionTemplate(tes1SqlSessionFactory()); } }
以此类推之后每增加一个数据库源就循环上面的方法
注意!!!!包一定要放对你配置的位置,否则不识别就会报错!!!!!!
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