springboot+druid+mybatisplus使用註解整合配置多資料來源
阿新 • • 發佈:2021-07-16
pom.xml
檔案如下:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion><parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.9.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>mutipledatasource2</artifactId> <version>0.0.1-SNAPSHOT</version> <name>mutipledatasource2</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>dynamic-datasource-spring-boot-starter</artifactId> <version>2.5.6</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.20</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <profiles> <profile> <id>local1</id> <properties> <profileActive>local1</profileActive> </properties> <activation> <activeByDefault>true</activeByDefault> </activation> </profile> <profile> <id>local2</id> <properties> <profileActive>local2</profileActive> </properties> </profile> </profiles> </project>
application.yml 配置檔案:
server: port: 8080 spring: datasource: dynamic: primary: db1 # 配置預設資料庫 datasource: db1: # 資料來源1配置 url: jdbc:mysql://localhost:3306/db1?characterEncoding=utf8&useUnicode=true&useSSL=false&serverTimezone=GMT%2B8 username: root password: root driver-class-name: com.mysql.cj.jdbc.Driver db2: # 資料來源2配置 url: jdbc:mysql://localhost:3306/db2?characterEncoding=utf8&useUnicode=true&useSSL=false&serverTimezone=GMT%2B8 username: root password: root driver-class-name: com.mysql.cj.jdbc.Driver durid: initial-size: 1 max-active: 20 min-idle: 1 max-wait: 60000 autoconfigure: exclude: com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure # 去除druid配置
DruidDataSourceAutoConfigure
會注入一個DataSourceWrapper
,其會在原生的spring.datasource
下找 url, username, password 等。動態資料來源 URL 等配置是在 dynamic 下,因此需要排除,否則會報錯。排除方式有兩種,一種是上述配置檔案排除,還有一種可以在專案啟動類排除:
@SpringBootApplication(exclude = DruidDataSourceAutoConfigure.class) public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
2.3 給使用非預設資料來源添加註解@DS
@DS
可以註解在方法上和類上,同時存在方法註解優先於類上註解。
註解在 service 實現或 mapper 介面方法上,不要同時在 service 和 mapper 註解。
Mapper介面類註解:
@DS("db2") @Mapper public interface UserMapper extends BaseMapper<User> { }
Service實現類註解:
@Service @DS("db2") public class ModelServiceImpl extends ServiceImpl<ModelMapper, Model> implements IModelService {}
方法類:
@Select("SELECT * FROM user") @DS("db2") List<User> selectAll();