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springboot 整合 clickhouse

小码农叔叔 人气:0

前言

了解了clickhouse的基础概念和相关的理论之后，本篇将通过实例代码演示如何在Java代码中操作clickhouse，主要涉及的内容包括：

使用JDBC的方式操作clickhouseclickhouse与springboot的整合使用

前置准备

1、clickhouse服务确保已开启

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2、为保证实验效果，提前创建一张表，并为该表插入一些实验数据

create table t_order01(
 id UInt32,
 sku_id String,
 total_amount Decimal(16,2),
 create_time Datetime
) engine =MergeTree
 partition by toYYYYMMDD(create_time)
 primary key (id)
 order by (id,sku_id);
 
insert into t_order01 values
(101,'sku_001',1000.00,'2021-12-01 12:00:00'),
(102,'sku_002',2000.00,'2021-12-01 11:00:00'),
(102,'sku_004',2500.00,'2021-12-01 12:00:00'),
(102,'sku_002',2000.00,'2021-12-01 13:00:00'),
(102,'sku_002',12000.00,'2021-12-01 13:00:00'),
(102,'sku_002',600.00,'2020-06-12 12:00:00');

执行完毕sql之后，查询下default数据库下的表是否成功创建

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使用jdbc方式操作clickhouse

1、引入clickhouse的jdbc依赖

<dependency>
    <groupId>ru.yandex.clickhouse</groupId>
    <artifactId>clickhouse-jdbc</artifactId>
    <version>0.1.52</version>
</dependency>

2、实例代码

实大部分的操作和我们使用jdbc操作mysql的步骤类似，下面直接贴出代码，可以结合注释进行参考使用

import ru.yandex.clickhouse.ClickHouseConnection;
import ru.yandex.clickhouse.ClickHouseDataSource;
import ru.yandex.clickhouse.settings.ClickHouseProperties;
 
import java.sql.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
public class CreateTableTest {
 
    private static String username = "default";
    private static String password = "你的连接密码";
    private static String address = "jdbc:clickhouse://clickhouse的连接IP地址:8123";
    private static String db = "连接数据库名称（默认数据库：default）";
    private static int socketTimeout = 600000;
 
    public static void main(String[] args) throws Exception {
        //getConn();
        //queryTable();
        //createTable("");
        //insertOne();
        //dropTable();
        deleteById();
        //updateById();
    }
 
    /**
     * 查询数据
     */
    public static void queryTable(){
        List<Map<String, Object>> list = new ArrayList<>();
        String sql = "select * from user_info";
        Connection connection = getConn();
        try {
            Statement statement = connection.createStatement();
            ResultSet rs  = statement.executeQuery(sql);
            ResultSetMetaData rsmd = rs.getMetaData();
            while(rs.next()){
                Map<String, Object> row = new HashMap<>();
                for(int i = 1; i <= rsmd.getColumnCount(); i++){
                    row.put(rsmd.getColumnName(i), rs.getObject(rsmd.getColumnName(i)));
                }
                list.add(row);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
 
        //在此可以根据实际需求将解析的数据封装到对象中
        list.stream().forEach(item ->{
            Map<String, Object> rowData = item;
            System.out.println(rowData);
        });
        //System.out.println(list);
    }
 
    /**
     * 创建表
     * @throws Exception
     */
    public static void createTable(String tableSql) throws Exception{
        /*tableSql = "create table t_order02(\n" +
                " id UInt32,\n" +
                " sku_id String,\n" +
                " total_amount Decimal(16,2),\n" +
                " create_time Datetime\n" +
                ") engine =MergeTree\n" +
                " partition by toYYYYMMDD(create_time)\n" +
                " primary key (id)\n" +
                " order by (id,sku_id);";*/
        Connection connection = getConn();
        Statement statement = connection.createStatement();
        boolean execute = statement.execute(tableSql);
        if(execute){
            System.out.println(execute);
            System.out.println("创建表成功");
        }
    }
 
    /**
     * 删除表
     * @throws Exception
     */
    public static void dropTable() throws Exception{
        Connection connection = getConn();
        Statement statement = connection.createStatement();
        statement.execute("drop table t_order01;");
        System.out.println("删除表成功");
    }
 
    /**
     * 插入数据
     * 实际使用时候，插入的语句里面的参数从外部传入进去
     * @throws Exception
     */
    public static void insertOne() throws Exception{
        Connection connection = getConn();
        PreparedStatement pstmt = connection.prepareStatement("insert into t_order01 values('103', 'sku_004', '2500.00','2021-06-01 12:00:00')");
        pstmt.execute();
        System.out.println("insert success");
    }
 
    /**
     * 删除数据
     * 实际使用时候，删除的语句里面的参数从外部传入进去
     */
    public static void deleteById() throws Exception{
        Connection connection = getConn();
        //sku_id ='sku_001'
        PreparedStatement pstmt = connection.prepareStatement("alter table t_order01 delete where sku_id = 'sku_002';");
        pstmt.execute();
        System.out.println("delete success");
    }
 
    /**
     * 修改数据
     * 实际使用时候，修改的语句里面的参数从外部传入进去
     */
    public static void updateById() throws Exception{
        Connection connection = getConn();
        PreparedStatement pstmt = connection.prepareStatement("alter table t_order01 update total_amount=toDecimal32(2000.00,2) where id = '102'");
        pstmt.execute();
        System.out.println("update success");
    }
 
    public static Connection getConn() {
        ClickHouseProperties properties = new ClickHouseProperties();
        properties.setUser(username);
        properties.setPassword(password);
        properties.setDatabase(db);
        properties.setSocketTimeout(socketTimeout);
        ClickHouseDataSource clickHouseDataSource = new ClickHouseDataSource(address, properties);
        ClickHouseConnection conn = null;
        try {
            conn = clickHouseDataSource.getConnection();
            System.out.println(conn);
            System.out.println("连接成功");
            return conn;
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }
}

3、测试，选择查询和删除一条数据为例做测试

查询功能测试结果，见下面的控制台数据打印

在这里插入图片描述

删除功能测试结果，删除 "sku_id = sku_002 "的数据， 执行方法之后，见下面的控制台数据打印

在这里插入图片描述

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执行方法之后，再次查询该表

在这里插入图片描述

与springboot的整合

在实际开发过程中，更多是与框架整合在一起进行使用，比如很多项目中都使用springboot进行开发，下面演示如何在springboot中使用clickhouse

前置准备

确保clickhouse服务正常可用

1、准备一张表，以及表中插入一些实验数据

CREATE TABLE user_info (
  `id` UInt64,
  `user_name` String,
  `pass_word` String,
  `phone` String,
  `create_day` Date DEFAULT CAST(now(),'Date')
)ENGINE = MergeTree
primary key (id)
order by (id);
 
 
INSERT INTO user_info
  (id,user_name,pass_word,phone)
VALUES
  (1,'xiaowang','123456','13325511231'),
  (2,'xiaoma','123456','13825511231'),
  (3,'xiaozhao','123456','18925511231');

2、执行完毕上面的建表后，查询下表数据

在这里插入图片描述

代码完整整合步骤

1、导入完整依赖

<dependencies>
 
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
 
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-aop</artifactId>
    </dependency>
 
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</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>
        <version>5.1.38</version>
    </dependency>
 
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid-spring-boot-starter</artifactId>
        <version>1.1.13</version>
    </dependency>
 
    <dependency>
        <groupId>commons-lang</groupId>
        <artifactId>commons-lang</artifactId>
        <version>2.6</version>
    </dependency>
 
    <!-- clickHouse数据库 -->
    <dependency>
        <groupId>ru.yandex.clickhouse</groupId>
        <artifactId>clickhouse-jdbc</artifactId>
        <version>0.1.53</version>
    </dependency>
 
</dependencies>

2、基础配置文件

server:
  port: 7010
 
  # mybatis 配置
mybatis:
  type-aliases-package: com.congge.entity
  mapper-locations: classpath:/mapper/*.xml
 
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    click:
      driverClassName: ru.yandex.clickhouse.ClickHouseDriver
      url: jdbc:clickhouse://IP地址:8123/default
      username: default
      password: 123456
      initialSize: 10
      maxActive: 100
      minIdle: 10
      maxWait: 6000

3、使用一个配置类，关联第二步中的click配置属性

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
 
@Component
@ConfigurationProperties(prefix = "spring.datasource.click")
public class ConnectionParamConfig {
 
    private String driverClassName ;
    private String url ;
    private Integer initialSize ;
    private Integer maxActive ;
    private Integer minIdle ;
    private Integer maxWait ;
 
    private String username;
    private String password;
 
    public String getDriverClassName() {
        return driverClassName;
    }
    public void setDriverClassName(String driverClassName) {
        this.driverClassName = driverClassName;
    }
    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public Integer getInitialSize() {
        return initialSize;
    }
    public void setInitialSize(Integer initialSize) {
        this.initialSize = initialSize;
    }
    public Integer getMaxActive() {
        return maxActive;
    }
    public void setMaxActive(Integer maxActive) {
        this.maxActive = maxActive;
    }
    public Integer getMinIdle() {
        return minIdle;
    }
    public void setMinIdle(Integer minIdle) {
        this.minIdle = minIdle;
    }
    public Integer getMaxWait() {
        return maxWait;
    }
    public void setMaxWait(Integer maxWait) {
        this.maxWait = maxWait;
    }
 
    public String getUsername() {
        return username;
    }
 
    public void setUsername(String username) {
        this.username = username;
    }
 
    public String getPassword() {
        return password;
    }
 
    public void setPassword(String password) {
        this.password = password;
    }
}

4、重写datasource的配置，使用自定义的clickhouse的属性配置

import javax.annotation.Resource;
 
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
 
import javax.sql.DataSource;
 
@Configuration
public class DruidConfig {
 
    @Resource
    private ConnectionParamConfig jdbcParamConfig;
 
    /**
     * 重写 DataSource
     * @return
     */
    @Bean
    public DataSource dataSource() {
        DruidDataSource datasource = new DruidDataSource();
        datasource.setUrl(jdbcParamConfig.getUrl());
        datasource.setDriverClassName(jdbcParamConfig.getDriverClassName());
        datasource.setInitialSize(jdbcParamConfig.getInitialSize());
        datasource.setMinIdle(jdbcParamConfig.getMinIdle());
        datasource.setMaxActive(jdbcParamConfig.getMaxActive());
        datasource.setMaxWait(jdbcParamConfig.getMaxWait());
        datasource.setUsername(jdbcParamConfig.getUsername());
        datasource.setPassword(jdbcParamConfig.getPassword());
        return datasource;
    }
 
}

5、提供一个接口和mybatis的查询xml文件

public interface UserInfoMapper {
    void saveData (UserInfo userInfo) ;
    UserInfo selectById (@Param("id") Integer id) ;
    List<UserInfo> selectList () ;
}
 
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.congge.mapper.UserInfoMapper">
    <resultMap id="BaseResultMap" type="com.congge.entity.UserInfo">
        <id column="id" jdbcType="INTEGER" property="id" />
        <result column="user_name" jdbcType="VARCHAR" property="userName" />
        <result column="pass_word" jdbcType="VARCHAR" property="passWord" />
        <result column="phone" jdbcType="VARCHAR" property="phone" />
        <result column="create_day" jdbcType="VARCHAR" property="createDay" />
    </resultMap>
 
    <sql id="Base_Column_List">
        id,user_name,pass_word,phone,create_day
    </sql>
 
    <insert id="saveData" parameterType="com.congge.entity.UserInfo" >
        INSERT INTO user_info
        (id,user_name,pass_word,phone,create_day)
        VALUES
        (#{id,jdbcType=INTEGER},#{userName,jdbcType=VARCHAR},#{passWord,jdbcType=VARCHAR},
        #{phone,jdbcType=VARCHAR},#{createDay,jdbcType=VARCHAR})
    </insert>
 
    <select id="selectById" parameterType="java.lang.Integer" resultMap="BaseResultMap">
        select
        <include refid="Base_Column_List" />
        from user_info
        where id = #{id,jdbcType=INTEGER}
    </select>
 
    <select id="selectList" resultMap="BaseResultMap" >
        select
        <include refid="Base_Column_List" />
        from user_info
    </select>
 
</mapper>

6、接口和服务实现类

@RestController
public class UserInfoController {
 
    @Resource
    private UserInfoService userInfoService ;
 
    //localhost:7010/saveData
    @GetMapping("/saveData")
    public String saveData (){
        UserInfo userInfo = new UserInfo () ;
        userInfo.setId(4);
        userInfo.setUserName("xiaolin");
        userInfo.setPassWord("54321");
        userInfo.setPhone("18500909876");
        userInfo.setCreateDay("2022-02-06");
        userInfoService.saveData(userInfo);
        return "success";
    }
 
    //localhost:7010/getById?id=1
    @GetMapping("/getById")
    public UserInfo getById (int id) {
        return userInfoService.selectById(id) ;
    }
 
    @GetMapping("/getList")
    public List<UserInfo> getList () {
        return userInfoService.selectList() ;
    }
 
}

7、服务实现类，UserInfoService

@Service
public class UserInfoService {
 
    @Resource
    private UserInfoMapper userInfoMapper ;
 
    public void saveData(UserInfo userInfo) {
        userInfoMapper.saveData(userInfo);
    }
 
    public UserInfo selectById(Integer id) {
        return userInfoMapper.selectById(id);
    }
 
    public List<UserInfo> selectList() {
        return userInfoMapper.selectList();
    }
 
}

8、启动类

@SpringBootApplication
@MapperScan(basePackages = {"com.congge.mapper"})
public class App {
 
    public static void main(String[] args) {
        SpringApplication.run(App.class,args);
    }
 
}

9、功能接口测试

查询测试，调用接口：localhost:7010/getById?id=1

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插入数据测试，调用接口：localhost:7010/saveData

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然后再去clickhouse表中查询下数据

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 到此这篇关于springboot 整合 clickhouse的文章就介绍到这了,更多相关springboot 整合 clickhouse内容请搜索以前的文章或继续浏览下面的相关文章希望大家以后多多支持！

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