influxDB学习

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InfluxDB工具类

package com.wllfengshu.utils;

import org.influxdb.InfluxDB;
import org.influxdb.InfluxDBFactory;
import org.influxdb.dto.Point;
import org.influxdb.dto.Point.Builder;
import org.influxdb.dto.Query;
import org.influxdb.dto.QueryResult;
import java.util.Map;

/**
 * 时序数据库 InfluxDB操作工具类
 * @author tiandixuanwu
 *
 */
public class InfluxdbUtil {

	//以下配置信息可以从配置文件或者环境变量中读
    private static String openurl = "http://192.168.40.254:8086";//连接地址
    private static String username = "user";//用户名（默认是user/admin）
    private static String password = "admin";//密码
    private static String database = "PARAMTER_DB";//数据库

	private static InfluxdbUtil influxdbUtil = null;
	private static InfluxDB influxDB = null;
	private InfluxdbUtil(){}
	
	static{
		try {
			//创建连接
			influxDB = InfluxDBFactory.connect(openurl, username, password);
			//设置数据保存策略 defalut 策略名 /database 数据库名/ 30d 数据保存时限30天/ 1 副本个数为1/ 结尾DEFAULT表示设为默认的策略
			String command = String.format("CREATE RETENTION POLICY \"%s\" ON \"%s\" DURATION %s REPLICATION %s DEFAULT","defalut", database, "30d", 1);
			influxDB.query(new Query(command, database));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	/**
	 * 或者工具类的实例
	 * @return 
	 * @throws
	 */
	public static InfluxdbUtil getInfluxdbUtil() {
		if (influxdbUtil == null) {
			influxdbUtil=new InfluxdbUtil();
		}
		return influxdbUtil;
	}

	/**
	 * 查询
	 * @param command 查询语句
	 * @return
	 */
	public QueryResult query(String command) {
		return influxDB.query(new Query(command, database));
	}
	
	/**
	 * 插入(influxdb不需要创建表，直接在插入时指定表，无则创建，有则插入)
	 * @param tags 标签
	 * @param fields 字段
	 * @param measurement 表名
	 */
	public void insert(Map<String, String> tags, Map<String, Object> fields,String measurement) {
		Builder builder = Point.measurement(measurement);
		builder.tag(tags);
		builder.fields(fields);
		influxDB.write(database, "", builder.build());
	}

	/**
	 * 删除数据
	 * @param command 删除语句
	 * @return 返回错误信息
	 */
	public String deleteMeasurementData(String command) {
		QueryResult result = influxDB.query(new Query(command, database));
		return result.getError();
	}

	/**
	 * 创建数据库
	 * @param dbName
	 */
	public void createDB(String dbName) {
		influxDB.createDatabase(dbName);
	}

	/**
	 * 删除数据库
	 * @param dbName
	 */
	public void deleteDB(String dbName) {
		influxDB.deleteDatabase(dbName);
	}
	
}

测试类

package com.wllfengshu.influx;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.influxdb.dto.QueryResult;
import org.influxdb.dto.QueryResult.Result;
import org.influxdb.dto.QueryResult.Series;
import org.junit.Before;
import org.junit.Test;

import com.wllfengshu.utils.InfluxdbUtil;

/**
 * @author tiandixuanwu
 */
public class TestMain {
	private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	private InfluxdbUtil influxdbUtil = null;
	
	@Before
	public void init(){
		influxdbUtil = InfluxdbUtil.getInfluxdbUtil();
	}
	
	@Test
	public void createDB(){
		//创建数据库
		influxdbUtil.createDB("PARAMTER_DB");
	}
	
	@Test
	public void testInsert(){
		//测试插入数据
		Map<String, String> tags = new HashMap<>();
		Map<String, Object> fields = new HashMap<>();
		tags.put("TAG_NAME","name");
		fields.put("TAG_VALUE","张三");//注意，这里其实应该是FIELD_VALUE
		fields.put("TIMAMPEST", sdf.format(new Date()));
		influxdbUtil.insert(tags, fields, "test");
	}
	
	@Test
	public void testQuery(){
		//读取数据
		QueryResult queryResult = influxdbUtil.query("select * from test");
		for (Result result:queryResult.getResults()) {
			List<Series> series = result.getSeries();
			for (Series serie : series) {
				System.out.println(serie.getName());
				System.out.println(serie.getColumns());
				System.out.println(serie.getValues());
			}
		}
	}
}

pox.xml文件配置

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.wllfengshu</groupId>
	<artifactId>testInfluxdb</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<dependencies>
		<dependency>
			<groupId>org.influxdb</groupId>
			<artifactId>influxdb-java</artifactId>
			<version>2.5</version>
		</dependency>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.10</version>
			<scope>test</scope>
		</dependency>
	</dependencies>
</project>

效果图

（1）以下为程序输出的结果：

（2）上面的数据在命令行中看到的结果：

注：本人使用的是maven，大家也可以不使用，自己引入jar，下载地址：https://download.csdn.net/download/tiandixuanwuliang/10693992

注：influxdb安装参考教程：https://www.cnblogs.com/mafeng/p/6848166.html

注：参考网址：
https://blog.csdn.net/dailuwen/article/details/73741297
https://www.linuxdaxue.com/influxdb-basic-operation.html