若依ruoyi框架增加2个以上的数据源配置

1.配置application.yml文件

  # 数据库配置
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driverClassName: com.mysql.cj.jdbc.Driver
    druid:
      # 主库数据源
      master:
        url: jdbc:mysql://xxx/xxx?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8
        username: xxx
        password: xxx
      # 从库数据源
      slave:
        # 从数据源开关/默认关闭
        enabled: true
        url: jdbc:mysql://xxx/xxx?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8&allowMultiQueries=true
        username: xxx
        password: xxx
      # 这里就是新增加的数据源，比如是chatgpt库名
      chatgpt:
        # 从数据源开关/默认关闭
        enabled: true
        url: jdbc:mysql://xxx/chatgpt?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8&allowMultiQueries=true
        username: chatgpt
        password: chatgpt

2.增加枚举DataSourceType

package com.ruoyi.common.enums;

/**
 * 数据源
 * 
 * @author ruoyi
 */
public enum DataSourceType
{
    /**
     * 主库
     */
    MASTER,

    /**
     * 从库
     */
    SLAVE,
    /**新增加的库枚举*/
    CHATGPT
}

3.增加数据源加载DruidConfig

package com.ruoyi.framework.config;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.sql.DataSource;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
import com.alibaba.druid.spring.boot.autoconfigure.properties.DruidStatProperties;
import com.alibaba.druid.util.Utils;
import com.ruoyi.common.enums.DataSourceType;
import com.ruoyi.common.utils.spring.SpringUtils;
import com.ruoyi.framework.config.properties.DruidProperties;
import com.ruoyi.framework.datasource.DynamicDataSource;

/**
 * druid 配置多数据源
 * 
 * @author ruoyi
 */
@Configuration
public class DruidConfig
{
    @Bean
    @ConfigurationProperties("spring.datasource.druid.master")
    public DataSource masterDataSource(DruidProperties druidProperties)
    {
        DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
        return druidProperties.dataSource(dataSource);
    }

    @Bean
    @ConfigurationProperties("spring.datasource.druid.slave")
    @ConditionalOnProperty(prefix = "spring.datasource.druid.slave", name = "enabled", havingValue = "true")
    public DataSource slaveDataSource(DruidProperties druidProperties)
    {
        DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
        return druidProperties.dataSource(dataSource);
    }

	//初始化将新的数据源druid对象，上面两个是原来的2个数据源，拷贝改
    @Bean
    @ConfigurationProperties("spring.datasource.druid.chatgpt")
    @ConditionalOnProperty(prefix = "spring.datasource.druid.chatgpt", name = "enabled", havingValue = "true")
    public DataSource chatgptDataSource(DruidProperties druidProperties)
    {
        DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
        return druidProperties.dataSource(dataSource);
    }

    @Bean(name = "dynamicDataSource")
    @Primary
    public DynamicDataSource dataSource(DataSource masterDataSource)
    {
        Map<Object, Object> targetDataSources = new HashMap<>();
        targetDataSources.put(DataSourceType.MASTER.name(), masterDataSource);
        setDataSource(targetDataSources, DataSourceType.SLAVE.name(), "slaveDataSource");
        //将新的数据源对象加载到DataSource去
        setDataSource(targetDataSources, DataSourceType.CHATGPT.name(), "chatgptDataSource");
        return new DynamicDataSource(masterDataSource, targetDataSources);
    }
    
    //...
}

4.编写测试Mapper

package com.ruoyi.xxx.mapper;

import com.ruoyi.common.annotation.DataSource;
import com.ruoyi.common.enums.DataSourceType;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Component;

import java.util.List;
import java.util.Map;

@Component
public interface TestChatgptMapper {

	//切换数据源就用这个注解，跟框架自带的2个使用方式没有差别
	//假设chatgpt数据库用有个user表可以拿来查询
    @DataSource(value= DataSourceType.CHATGPT)
    @Select("select * from user")
    List<Map> selectAll();

}

5.编写测试类使用

//...
@Autowired
private TestChatgptMapper testChatgptMapper;
@Test
void test7(){
    List<Map> res = testChatgptMapper.selectAll();
    System.out.println(res.toString());
}
//...