springboot+druid+mybatisplus使用注解整合连接多个数据库
程序员文章站
2022-07-10 17:58:52
主要依赖包spring-boot-starter-webmybatis-plus-boot-starterdynamic-datasource-spring-boot-starter # 配置动态数据源druid-spring-boot-starter # 阿里的数据库连接池mysql-connector-javalombokpom.xml文件如下:
主要依赖包
spring-boot-starter-web
mybatis-plus-boot-starter
dynamic-datasource-spring-boot-starter # 配置动态数据源
druid-spring-boot-starter # 阿里的数据库连接池
mysql-connector-java
lombok
pom.xml文件如下:
<?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 配置文件
server:
port: 8080
spring:
datasource:
dynamic:
primary: db1 # 配置默认数据库
datasource:
db1: # 数据源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: # 数据源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会注入一个DataSourceWrapper,其会在原生的spring.datasource下找 url, username, password 等。动态数据源 URL 等配置是在 dynamic 下,因此需要排除,否则会报错。排除方式有两种,一种是上述配置文件排除,还有一种可以在项目启动类排除:
@SpringBootApplication(exclude = DruidDataSourceAutoConfigure.class)
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
给使用非默认数据源添加注解@DS
@DS 可以注解在方法上和类上,同时存在方法注解优先于类上注解。
注解在 service 实现或 mapper 接口方法上,不要同时在 service 和 mapper 注解。
@DS("db2")
public interface UserMapper extends BaseMapper<User> {
}
@Service
@DS("db2")
public class ModelServiceImpl extends ServiceImpl<ModelMapper, Model> implements IModelService {}
@Select("SELECT * FROM user")
@DS("db2")
List<User> selectAll();
本文地址:https://blog.csdn.net/qq_42981242/article/details/110246103
上一篇: 入门:单反拍出诱人美食的几个技巧