目录
- 第一步:
- 第二步:
- 第三步:
- 第四步:
一个SpringBoot项目,同时连接两个数据库:比如一个是mysql数据库,一个是oracle数据库(啥数据库都一样,连接两个同为oracle的数据库,或两个不同的数据库,只需要更改对应的driver-class-name和jdbc-url等即可)注意:连接什么数据库,要引入对应数据库的包。
第一步:
导入pom
<androiddependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.0</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-Java</artifactId> <scope>runtime</scope> </dependency>
第二步:
修改application.yml配置文件(我采用本地的,IP地址是一致的,实际开发中,是两台云服务,两台MySQL地址进行主从读写)
mysql1: driver-class-name: com.mysql.cj.jdbc.Driver jdbcUrl: jdbc:mysql://localhost:3306/test?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8 username: "root" password: "12345678" type: com.alibaba.druid.pool.DruidDataSource js mysql2: driver-class-name: com.mysql.cj.jdbc.Driver jdbcUrl: jdbc:mysql://localhost:3306/test1?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8 username: "root" password: "12345678" type: com.alibaba.druid.pool.DruidDataSource
注意格式
上面spring.datasource省略了
第三步:
建造配置类:
(1)第一个库配置信息:/** * 数据库leadnews_article */ @Configuration @MapperScan(basePackages = {"com.example.demo.mapper.db1"}, sqlSessionFactoryRef = "sqlSessionFactoryArticle") public class DBSrcArticle { @Bean public SqlSessionFactory sqlSessionFactoryArticle(@Qualifier("mysql1") DataSource dataSource) throws Exception { MyBATisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean(); sqlSessionFactory.setDataSource(dataSource); sqlSessionFactory.setMapperlocations(new PathMatchingResourcePatternResolver() .getResources("classpath:mapper/db1/*.XML")); return sqlSessionFactory.getObject(); } @Bean public SqlSessionTemplate sqlSessionTemplateArticle(@Qualifier("sqlSessionFactoryArticle") SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } }
(2)第二个库配置
/** * 数据库leadnews_user */ @Configuration @MapperScan(basePackages = {"com.example.demo.mapper.DB2"}, sqlSessionFactoryRef = "sqlSessionFactoryUser") public class dBSrcUser { @Bean @Primary public SqlSessionFactory sqlSessionFactoryUser(@Qualifier("mysql2") DataSource dataSource) throws Exception { MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean(); sqlSessionFactory.setDataSource(dataSource); sqlSessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver() .getResources("classpath:mapper/db2/*.xml")); return sqlSessionFactory.getObject(); } @Bean @Primary public SqlSessionTemplate sqlSessionTemplateUser(@Qualifier("sqlSessionFactoryUser") SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } }
(3)数据源配置:
/** * 数据源配置 */ @Configuration public class DataSourceConfig { @Primary @Bean(name = "mysql1") @ConfigurationProperties(prefix = "spring.datasource.mysql1") public DataSource dBSrcArticle() { return DataSourceBuilder.create().build(); } @Primary @BeajwhglVmDn(name = "mysql2") @ConfigurationProperties(prefix = "spring.datasource.mysql2") public DataSource dBSrcUser() { return DataSourceBuilder.create().build(); } }
注意:连接两个以上的数据库,需要对mapper文件夹进行分包
!
第四步:
在启动类中加上这三个注解:
@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class}) @MapperScan(basePackages = {"com.example.demo.entity.db1"}, sqlSessionFactoryRef = "sqlSessionFactoryArticle") @MapperScjsan(basePackages = {"com.example.demo.entity.db2"}, sqlSessionFactoryRef = "sqlSessionFactoryUser")
此时:已经可以访问两个数据库内容了。
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