• 创建maven项目引入依赖

引入ClickHouse驱动包

1.  
   <dependency>
2.  
   <groupId>ru.yandex.clickhouse</groupId>
3.  
   <artifactId>clickhouse-jdbc</artifactId>
4.  
   <version>0.1.40</version>
5.  
   </dependency>

• 修改ClickHouse配置文件

vim /etc/clickhouse-server/config.xml

配置jdbc访问端口

<http_port>8123</http_port>

配置ip地址

1.  
   <listen_host>::1</listen_host>
2.  
   <listen_host>172.16.1.23</listen_host>

• 编写测试类

1.  
   package com.zhangwq;
2.  
    
3.  
   import java.sql.*;
4.  
   import java.util.ArrayList;
5.  
   import java.util.HashMap;
6.  
   import java.util.List;
7.  
   import java.util.Map;
8.  
    
9.  
   /**
10.  
    * @author zhangwq
11.  
    * @date 2018/6/30 20:58
12.  
    */
13.  
    public class ClickHouseJDBC {
14.  
    public static void main(String[] args) {
15.  
    String sqlDB = "show databases";//查询数据库
16.  
    String sqlTab = "show tables";//查看表
17.  
    String sqlCount = "select count(*) count from ontime";//查询ontime数据量
18.  
    exeSql(sqlDB);
19.  
    exeSql(sqlTab);
20.  
    exeSql(sqlCount);
21.  
    }
22.  
     
23.  
    public static void exeSql(String sql){
24.  
    String address = "jdbc:clickhouse://172.16.1.23:8123/default";
25.  
    Connection connection = null;
26.  
    Statement statement = null;
27.  
    ResultSet results = null;
28.  
    try {
29.  
    Class.forName("ru.yandex.clickhouse.ClickHouseDriver");
30.  
    connection = DriverManager.getConnection(address);
31.  
    statement = connection.createStatement();
32.  
    long begin = System.currentTimeMillis();
33.  
    results = statement.executeQuery(sql);
34.  
    long end = System.currentTimeMillis();
35.  
    System.out.println("执行（"+sql+"）耗时："+(end-begin)+"ms");
36.  
    ResultSetMetaData rsmd = results.getMetaData();
37.  
    List<Map> list = new ArrayList();
38.  
    while(results.next()){
39.  
    Map map = new HashMap();
40.  
    for(int i = 1;i<=rsmd.getColumnCount();i++){
41.  
    map.put(rsmd.getColumnName(i),results.getString(rsmd.getColumnName(i)));
42.  
    }
43.  
    list.add(map);
44.  
    }
45.  
    for(Map map : list){
46.  
    System.err.println(map);
47.  
    }
48.  
    } catch (Exception e) {
49.  
    e.printStackTrace();
50.  
    }finally {//关闭连接
51.  
    try {
52.  
    if(results!=null){
53.  
    results.close();
54.  
    }
55.  
    if(statement!=null){
56.  
    statement.close();
57.  
    }
58.  
    if(connection!=null){
59.  
    connection.close();
60.  
    }
61.  
    } catch (SQLException e) {
62.  
    e.printStackTrace();
63.  
    }
64.  
    }
65.  
    }
66.  
    }

启动项目测试，发现如下报错。

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".

SLF4J: Defaulting to no-operation (NOP) logger implementation

pom引入slf4j相关文件引入依赖，并resource下添加log4j2.properties解决该问题

1.  
   <dependency>
2.  
   <groupId>org.apache.logging.log4j</groupId>
3.  
   <artifactId>log4j-slf4j-impl</artifactId>
4.  
   <version>2.11.0</version>
5.  
   </dependency>

• 查看输出结果

1.  
   {name=default}
2.  
   {name=system}
3.  
   执行（show databases）耗时：2ms
4.  
   {name=ontime}
5.  
   执行（show tables）耗时：2ms
6.  
   {name=zwqtest}
7.  
   {name=zwqtestall}
8.  
   执行（select count(*) count from ontime）耗时：98ms
9.  
   {count=177920306}

10.