SpringBoot整合mysql、postgres及sqlserver实现多数据源配置实战案例
分享一下近期处理的一个小demo,关于配置多数据源实现不同服务之间的数据推送和数据治理。第一次接触到pg库和sqlserver一头雾水,选择了JDBC+mybatis-plus的方式去链接。
1、首先要引入以下依赖
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.12</version> <optional>true</optional> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.10</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.62</version> </dependency> <!--mysql 驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.22</version> </dependency> <!--postgresql 驱动--> <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <scope>runtime</scope> </dependency> <!--sqlserver 配置--> <dependency> <groupId>com.microsoft.sqlserver</groupId> <artifactId>mssql-jdbc</artifactId> <version>9.4.0.jre8</version> </dependency> <!--//spring默认的jdbc连接--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.13</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.0</version> </dependency> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-base</artifactId> <version>4.4.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <version>2.7.12</version> <configuration> <!-- 指定该Main Class为全局的唯一入口 --> <mainClass>com.zkgl.ZsjDemoApplication</mainClass> </configuration> <executions> <execution> <goals> <!--可以把依赖的包都打包到生成的Jar包中 --> <goal>repackage</goal> </goals> </execution> </executions> </plugin> </plugins> </build>
2、demo的项目结构如下
3、yml配置文件
server: port:3666 spring: application: name: multiple-data datasource: show-sql: false db1: jdbc-url: jdbc:mysql://ip地址:端口/数据库名?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true username: 数据库账号 password: 数据库密码 driver-class-name: com.mysql.cj.jdbc.Driver db2: jdbc-url: jdbc:postgresql://ip地址:端口/数据库名?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true username: 数据库账号 password: 数据库密码 driver-class-name: org.postgresql.Driver db3: jdbc-url: jdbc:sqlserver://ip地址:端口;databaseName=数据库名 username: 数据库账号 password: 数据库密码 driver-class-name: com.microsoft.sqlserver.jdbc.SQLServerDriver
4、配置类
package com.zkgl.config; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Qualifier; 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.core.io.support.PathMatchingResourcePatternResolver; import javax.sql.DataSource; /** * @Author: 袁振豪 * @Description: * @Date: Created in 2023-07-23 11:04 PM * @Modified By: */ @Configuration @MapperScan(basePackages = "com.zkgl.dao.db1",sqlSessionFactoryRef = "db1SqlSessionFactory") public class MysqlDataSourceConfig { static final String MAPPER_LOCATION = "classpath:/mapper/db1/*.xml"; @Bean("db1DataSource") @ConfigurationProperties(prefix = "spring.datasource.db1") public DataSource getDb1DataSource(){ return DataSourceBuilder.create().build(); } @Bean("db1SqlSessionFactory") public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db1DataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(dataSource); bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION)); return bean.getObject(); } @Bean("db1SqlSessionTemplate") public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db1SqlSessionFactory") SqlSessionFactory sqlSessionFactory){ return new SqlSessionTemplate(sqlSessionFactory); } }
package com.zkgl.config; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Qualifier; 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.core.io.support.PathMatchingResourcePatternResolver; import javax.sql.DataSource; /** * @Author: 袁振豪 * @Description: * @Date: Created in 2023-07-23 11:04 PM * @Modified By: */ @Configuration @MapperScan(basePackages = "com.zkgl.dao.db2",sqlSessionFactoryRef = "db2SqlSessionFactory") public class PgDataSourceConfig { static final String MAPPER_LOCATION = "classpath:/mapper/db2/*.xml"; @Bean("db2DataSource") @ConfigurationProperties(prefix = "spring.datasource.db2") public DataSource getDb2DataSource(){ return DataSourceBuilder.create().build(); } @Bean("db2SqlSessionFactory") public SqlSessionFactory db2SqlSessionFactory(@Qualifier("db2DataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(dataSource); bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION)); return bean.getObject(); } @Bean("db2SqlSessionTemplate") public SqlSessionTemplate db2SqlSessionTemplate(@Qualifier("db2SqlSessionFactory") SqlSessionFactory sqlSessionFactory){ return new SqlSessionTemplate(sqlSessionFactory); } }
package com.zkgl.config; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.boot.jdbc.DataSourceBuilder; import org.springframework.context.annotation.Bean; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import javax.sql.DataSource; import org.mybatis.spring.annotation.MapperScan; import org.springframework.context.annotation.Configuration; /** * @Author: 袁振豪 * @Description: * @Date: Created in 2023-07-23 11:04 PM * @Modified By: */ @Configuration @MapperScan(basePackages = "com.zkgl.dao.db3",sqlSessionFactoryRef = "db3SqlSessionFactory") public class SqlServerDataSourceConfig { static final String MAPPER_LOCATION = "classpath:/mapper/db3/*.xml"; @Bean("db3DataSource") @ConfigurationProperties(prefix = "spring.datasource.db3") public DataSource getDb1DataSource(){ return DataSourceBuilder.create().build(); } @Bean("db3SqlSessionFactory") public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db3DataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(dataSource); bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION)); return bean.getObject(); } @Bean("db3SqlSessionTemplate") public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db3SqlSessionFactory") SqlSessionFactory sqlSessionFactory){ return new SqlSessionTemplate(sqlSessionFactory); } }
5、controller、dao、service以及对应的.xml文件可以根据自身业务情况进行开发,再次不做过多赘述。
总结:要进行多数据源的配置,以此案例为例,最重要的是对各个库的适配,也就是各自的驱动。众所周知,要使用JDBC连接数据库,主要有以下步骤:
- 注册驱动
- 建立数据库连接
- 创建数据库操作对象
- 执行SQL语句
- 处理查询结果集
- 关闭资源
而在本案例中,pom中引入了相关依赖,在yml配置了驱动,之后在config中以Bean的形式分别命名和初始化相关配置,这样在Springboot项目中,通过@SpringBootApplication注解中的@EnableAutoConfigtion注解就可以扫描到这些配置好的Bean,从而正常使用了。
总结
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