关于 SpringBoot 连接 ClickHouse

本文章讲解在SpringBoot + MyBatis 配置使用ClickHouse数据库（单机版/集群版）

ClickHouse JDBC驱动：

        官方
                1. GitHub - ClickHouse/clickhouse-jdbc: JDBC driver for ClickHouse

        第三方驱动

                1. GitHub - blynkkk/clickhouse4j: Lighter and faster alternative for the official ClickHouse JDBC driver

                2. GitHub - housepower/ClickHouse-Native-JDBC: ClickHouse Native Protocol JDBC implementation

本文中案例使用官方驱动

POM 依赖

    ru.yandex.clickhouse
    clickhouse-jdbc
    0.3.1

集群版

1. YML配置

单机版
spring:
  datasource:
    driver-class-name: ru.yandex.clickhouse.ClickHouseDriver
    url: jdbc:clickhouse://ip:port/库名
    user: user
    password: password



集群版
spring:
  datasource:
    driver-class-name: ru.yandex.clickhouse.ClickHouseDriver
    url: jdbc:clickhouse://ip:port,ip:port/库名
    user: user
    password: password

2. 数据库配置属性类

@Data
@NoArgsConstructor
@AllArgsConstructor
@EqualsAndHashCode(callSuper = true)
public class ClickHouseDataSourceProperties extends ClickHouseProperties{

    private String url;

}

3. 数据源配置类

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import ru.yandex.clickhouse.BalancedClickhouseDataSource;
import ru.yandex.clickhouse.ClickHouseDataSource;

import javax.sql.DataSource;
import java.util.concurrent.TimeUnit;


@Configuration
public class DataSourcesConfig {


    
    @Bean(name = "clickHouseDataSource")
    public DataSource clickHouseDataSource(@Qualifier("clickHouseDataSourceProperties") ClickHouseDataSourceProperties clickHouseDataSourceProperties) {
        return new ClickHouseDataSource(clickHouseDataSourceProperties.getUrl(), clickHouseDataSourceProperties);
    }


    
    @Bean(name = "clickHouseDataSource")
    public DataSource clickHouseDataSource(@Qualifier("clickHouseDataSourceProperties") ClickHouseDataSourceProperties clickHouseDataSourceProperties) {
        BalancedClickhouseDataSource balancedClickhouseDataSource = new BalancedClickhouseDataSource
                (clickHouseDataSourceProperties.getUrl(), clickHouseDataSourceProperties);
        //配置定时任务定时检查可用的数据库连接
        balancedClickhouseDataSource.scheduleActualization(10, TimeUnit.SECONDS);
        return balancedClickhouseDataSource;
    }

    
    @Bean(name = "clickHouseDataSourceProperties")
    @ConfigurationProperties("spring.datasource")
    public ClickHouseDataSourceProperties clickHouseDataSourceProperties() {
        return new ClickHouseDataSourceProperties();
    }


}

4. MyBatis配置类

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import javax.sql.DataSource;


@Configuration
// 配置mybatis的接口类放的地方
@MapperScan(basePackages = "com.mapper", sqlSessionFactoryRef = "sqlSessionFactory")
public class ClickHouseForMyBatis {

    @Bean(name = "sqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("clickHouseDataSource") DataSource datasource)
            throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(datasource);
        bean.setMapperLocations(
                // 设置mybatis的xml所在位置
                new PathMatchingResourcePatternResolver().getResources("classpath*:mapper/*.xml"));
        return bean.getObject();
    }

    @Bean("sqlSessionTemplate")
    public SqlSessionTemplate sqlsessiontemplate(
            @Qualifier("sqlSessionFactory") SqlSessionFactory sessionfactory) {
        return new SqlSessionTemplate(sessionfactory);
    }
}