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108 lines
2.8 KiB
108 lines
2.8 KiB
11 months ago
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# mybatis多数据源配置
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## dynamic-datasource
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### 1、引入依赖
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4.1.3版本是稳定版
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```xml
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<!-- dynamic-datasource -->
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<dependency>
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<groupId>com.baomidou</groupId>
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<artifactId>dynamic-datasource-spring-boot-starter</artifactId>
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<version>4.1.3</version>
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</dependency>
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```
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### 2、配置数据源
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需要注意的是，这里使用了druid，p6spy
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需要配置对应的数据源，使用primary来指明默认的数据源
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```yml
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#配置数据源
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spring:
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autoconfigure:
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exclude: com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure
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datasource:
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dynamic:
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primary: db1
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datasource:
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db1:
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driver-class-name: com.p6spy.engine.spy.P6SpyDriver
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url: jdbc:p6spy:mysql://${DB_HOST:127.0.0.1}:${DB_PORT:3306}/${DB_NAME:stand_lms}?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false&useOldAliasMetadataBehavior=true
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username: ${DB_USER:root}
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password: ${DB_PWD:12356}
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type: com.alibaba.druid.pool.DruidDataSource
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db2:
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driver-class-name: com.p6spy.engine.spy.P6SpyDriver
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url: jdbc:p6spy:mysql://${DB_HOST:127.0.0.1}:${DB_PORT:13306}/${DB_NAME:test}?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false&useOldAliasMetadataBehavior=true
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username: ${DB_USER:root}
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password: ${DB_PWD:12356}
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type: com.alibaba.druid.pool.DruidDataSource
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```
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集成了druid需要去除druid配置
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```yml
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autoconfigure:
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exclude: com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure
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```
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去除框架原来对druid数据源的配置类
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```java
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//import com.alibaba.druid.pool.DruidDataSource;
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//import lombok.extern.slf4j.Slf4j;
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//import org.springframework.boot.context.properties.ConfigurationProperties;
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//import org.springframework.context.annotation.Bean;
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//import org.springframework.context.annotation.Configuration;
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//import org.springframework.context.annotation.Primary;
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//
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//import javax.sql.DataSource;
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//
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//@Configuration
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//@Slf4j
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//public class DataBaseConfig {
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//
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// @Primary
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// @Bean(name = "dataSource")
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// @ConfigurationProperties(prefix = "spring.datasource.druid")
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// public DataSource dataSource() {
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// return new DruidDataSource();
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// }
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//
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//}
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```
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排除掉DruidDataSourceAutoConfigure
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在启动类中需要排除掉DruidDataSourceAutoConfigure.class，就是取消Druid的数据源的自动配置类。
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```java
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@SpringBootApplication(exclude = {
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DataSourceAutoConfiguration.class,
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DruidDataSourceAutoConfigure.class
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})
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```
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也可以在配置类中
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```yml
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autoconfigure:
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exclude: com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure
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```
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### 3、测试
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使用@DS("db2")注解实现切换数据源
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```java
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public interface TestMapper extends BaseMapper<JSONObject> {
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@DS("db2")
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JSONObject getAll13();
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}
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```
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