SpringBoot的Web项目Mybatis-plus多数据源
1、pom.xml依赖
①、Web项目跑起来：只需要 spring-boot-starter-web 【包含：tomcat、webmvc框架、Jackson、spring-boot-starter】
②、这里添加了：打包插件、测试依赖、mysql连接、mybatis-plus 使用及多数据源
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.manmanqiu</groupId><artifactId>asdasdas</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target></properties><dependencies><!--对全栈web开发的支持，包括Tomcat和spring-webmvc--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><version>2.7.18</version></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.0</version></dependency><dependency><groupId>com.baomidou</groupId><artifactId>dynamic-datasource-spring-boot-starter</artifactId><version>3.5.0</version></dependency><!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.21</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><version>2.7.18</version></dependency><!-- https://mvnrepository.com/artifact/org.projectlombok/lombok --><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.24</version><scope>provided</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build>
</project>2、application.yml
server:port: 9003spring:datasource:dynamic:primary: masterstrict: falsedatasource:master:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/lottery?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8username: rootpassword: 123456slave_01:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/bank?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8username: rootpassword: 123456mybatis-plus:configuration:log-impl: org.apache.ibatis.logging.stdout.StdOutImpl3、切换数据源：使用@DS 注解
如果是测试：那么【Mapper层】 标注@DS， 注意如果是Service层控制切换数据源，就标Service层。
- 此处：Service层控制
@Service
@DS("slave_01")
public class TActServiceImpl extends ServiceImpl<TActMapper, TAct> implements ITActService {}
- @Test 测试类：标注了没有用。
@Testpublic void test05(){List<TAct> list = actService.list();list.forEach(System.out::println);}