Spring boot 多数据源动态切换

依赖：

<? version=\"1.0\" encoding=\"UTF-8\"?>

4.0.0

org.spring work.boot
spring-boot-starter-parent
2.1.1.RELEASE

com.tydic.ohaotian
datasourcetest
0.0.1-SNAPSHOT
datasourcetest
Demo project for Spring Boot

<properties>
    <java.version>1.8</java.version>
</properties>


<dependencies>
    <dependency>
        <groupId>org.spring work.boot</groupId>
        <artifactId>spring-boot-starter-aop</artifactId>
    </dependency>
    <dependency>
        <groupId>org.spring work.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.3.2</version>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.spring work.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <!--反向工程-->
    <dependency>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-core</artifactId>
        <version>1.3.5</version>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.spring work.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.5</version>
            <configuration>
                <verbose>true</verbose>
                <overwrite>true</overwrite>
            </configuration>
        </plugin>
    </plugins>
</build>

配置文件：
server:
port: 8080
spring:
datasource:
master:
password: 123
url: jdbc:mysql://localhost:3306/taotao?useUnicode=true&characterEncoding=UTF-8
driver-class-name: com.mysql.jdbc.Driver
username: root
type: com.zaxxer.hikari.HikariDataSource
cluster:
- key: slave1
password: BJtydic_321
url: jdbc:mysql://rm-2zestsji9xm1x0o89do.mysql.rds.aliyuncs.com:3306/zt_s_user?useUnicode=true&characterEncoding=UTF-8
idle-timeout: 20000
driver-class-name: com.mysql.jdbc.Driver
username: dev_commdb
type: com.zaxxer.hikari.HikariDataSource
mybatis:
mapper-locations: classpath:/mapper/*. #扫描xxxmapper. 文件

logging:
level:
com:
yukong:
chapter5:
repository: debug

启动类：
import com.tydic.ohaotian.datasourcetest.dataSource.DynamicDataSourceAnnotationAdvisor;
import com.tydic.ohaotian.datasourcetest.dataSource.DynamicDataSourceAnnotationInterceptor;
import com.tydic.ohaotian.datasourcetest.dataSource.DynamicDataSourceRegister;
import org.mybatis.spring.annotation.MapperScan;
import org.spring work.boot.SpringApplication;
import org.spring work.boot.autoconfigure.SpringBootApplication;
import org.spring work.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.spring work.context.annotation.Bean;
import org.spring work.context.annotation.Import;

@Import(DynamicDataSourceRegister.class)
@MapperScan(“com.tydic.ohaotian.datasourcetest.dao”)
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
public class DatasourcetestApplication {

public static void main(String[] args) {
    SpringApplication.run(DatasourcetestApplication.class, args);
}
@Bean
public DynamicDataSourceAnnotationAdvisor dynamicDatasourceAnnotationAdvisor() {
    return new DynamicDataSourceAnnotationAdvisor(new DynamicDataSourceAnnotationInterceptor());
}

}

多数据源用到的配置类：
package com.tydic.ohaotian.datasourcetest.dataSource;

import java.lang.annotation.*;

/**

切换数据注解可以用于类或者方法级别方法级别优先级 > 类级别
*/
@Target({ElementType.METHOD, ElementType.TYPE, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface DataSource {
String value() default “master”; //该值即key值
}