springboot整合mybatis多数据源
时间: 2023-10-08 10:10:50 浏览: 48
好的,关于springboot整合mybatis多数据源的问题,可以给您提供一些参考。首先,在使用SpringBoot整合MyBatis时,我们可以通过配置多个数据源来实现多数据源的功能。其次,如果您需要在同一个事务中同时操作多个数据源,可以使用分布式事务框架,例如Atomikos或Bitronix。希望以上信息能对您有所帮助。
相关问题
springboot整合mybatis多数据源 给出示例代码
好的,以下是一个简单的示例代码:
```
@Configuration
@MapperScan(basePackages = "com.example.mapper")
public class MybatisConfig {
@Bean(name = "db1DataSource")
@ConfigurationProperties(prefix = "spring.datasource.db1")
public DataSource db1DataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "db1SqlSessionFactory")
public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db1DataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
return bean.getObject();
}
@Bean(name = "db1TransactionManager")
public DataSourceTransactionManager db1TransactionManager(@Qualifier("db1DataSource") DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
}
@Bean(name = "db1SqlSessionTemplate")
public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
@Bean(name = "db2DataSource")
@ConfigurationProperties(prefix = "spring.datasource.db2")
public DataSource db2DataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "db2SqlSessionFactory")
public SqlSessionFactory db2SqlSessionFactory(@Qualifier("db2DataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
return bean.getObject();
}
@Bean(name = "db2TransactionManager")
public DataSourceTransactionManager db2TransactionManager(@Qualifier("db2DataSource") DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
}
@Bean(name = "db2SqlSessionTemplate")
public SqlSessionTemplate db2SqlSessionTemplate(@Qualifier("db2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
```
这是一个简单的 Mybatis 多数据源配置,配置了两个数据源 `db1` 和 `db2`,并分别配置了对应的 SqlSessionFactory、TransactionManager 和 SqlSessionTemplate。在这里,我们使用了 `@ConfigurationProperties` 注解来读取 `application.properties` 中的配置信息。
springboot整合mybatis 多数据源并给出具体代码
好的,以下是一个简单的 Spring Boot 整合 MyBatis 多数据源的示例代码:
首先,在 pom.xml 文件中添加以下依赖:
```xml
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.4</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.2.6</version>
</dependency>
```
然后,在 application.properties 文件中配置数据源:
```properties
# 主数据源
spring.datasource.url=jdbc:mysql://localhost:3306/db1
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
# 从数据源
spring.datasource.second.url=jdbc:mysql://localhost:3306/db2
spring.datasource.second.username=root
spring.datasource.second.password=123456
spring.datasource.second.driver-class-name=com.mysql.jdbc.Driver
```
接下来,创建两个数据源的配置类:
```java
@Configuration
@MapperScan(basePackages = "com.example.mapper.primary", sqlSessionTemplateRef = "primarySqlSessionTemplate")
public class PrimaryDataSourceConfig {
@Bean
@Primary
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource primaryDataSource() {
return DruidDataSourceBuilder.create().build();
}
@Bean
@Primary
public SqlSessionFactory primarySqlSessionFactory(@Qualifier("primaryDataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
return bean.getObject();
}
@Bean
@Primary
public SqlSessionTemplate primarySqlSessionTemplate(@Qualifier("primarySqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
@Configuration
@MapperScan(basePackages = "com.example.mapper.second", sqlSessionTemplateRef = "secondSqlSessionTemplate")
public class SecondDataSourceConfig {
@Bean
@ConfigurationProperties(prefix = "spring.datasource.second")
public DataSource secondDataSource() {
return DruidDataSourceBuilder.create().build();
}
@Bean
public SqlSessionFactory secondSqlSessionFactory(@Qualifier("secondDataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
return bean.getObject();
}
@Bean
public SqlSessionTemplate secondSqlSessionTemplate(@Qualifier("secondSqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
```
最后,在需要使用数据源的地方,使用 @Qualifier 注解指定数据源:
```java
@Service
public class UserService {
@Autowired
@Qualifier("primarySqlSessionTemplate")
private SqlSessionTemplate primarySqlSessionTemplate;
@Autowired
@Qualifier("secondSqlSessionTemplate")
private SqlSessionTemplate secondSqlSessionTemplate;
public User getUserByIdFromPrimaryDataSource(int id) {
return primarySqlSessionTemplate.selectOne("com.example.mapper.primary.UserMapper.getUserById", id);
}
public User getUserByIdFromSecondDataSource(int id) {
return secondSqlSessionTemplate.selectOne("com.example.mapper.second.UserMapper.getUserById", id);
}
}
```
希望这个示例能够帮助你!