本文实例为大家分享了java使用influxdb数据库的具体代码，供大家参考，具体内容如下
1.pom.xml中导入jar包依赖
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<!-- 引入influxdb依赖 -->
<dependency>
<groupid>org.influxdb</groupid>
<artifactid>influxdb-java</artifactid>
<version>2.5</version>
</dependency>
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2.编写influxdb工具类：
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package com.hontye.parameter.util;
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 连接
* @author dai_lw
*
*/
public class influxdbutil {
private static string openurl = "http://127.0.0.1:8086";//连接地址
private static string username = "root";//用户名
private static string password = "root";//密码
private static string database = "paramter_db";//数据库
private static string measurement = "tw_parameter_tb";//表名
private influxdb influxdb;
public influxdbutil(string username, string password, string openurl, string database){
this.username = username;
this.password = password;
this.openurl = openurl;
this.database = database;
}
public static influxdbutil setup(){
//创建 连接
influxdbutil influxdbutil = new influxdbutil(username, password, openurl, database);
influxdbutil.influxdbbuild();
influxdbutil.createretentionpolicy();
// influxdb.deletedb(database);
// influxdb.createdb(database);
return influxdbutil;
}
/**连接时序数据库；获得influxdb**/
public influxdb influxdbbuild(){
if(influxdb == null){
influxdb = influxdbfactory.connect(openurl, username, password);
influxdb.createdatabase(database);
}
return influxdb;
}
/**
* 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
*/
public void createretentionpolicy(){
string command = string.format("create retention policy \\"%s\\" on \\"%s\\" duration %s replication %s default",
"defalut", database, "30d", 1);
this.query(command);
}
/**
* 查询
* @param command 查询语句
* @return
*/
public queryresult query(string command){
return influxdb.query(new query(command, database));
}
/**
* 插入
* @param tags 标签
* @param fields 字段
*/
public void insert(map<string, string> tags, map<string, object> fields){
builder builder = point.measurement(measurement);
builder.tag(tags);
builder.fields(fields);
influxdb.write(database, "", builder.build());
}
/**
* 删除
* @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);
}
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;
}
public string getopenurl() {
return openurl;
}
public void setopenurl(string openurl) {
this.openurl = openurl;
}
public void setdatabase(string database) {
this.database = database;
}
}
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3.存值
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public class quatyserviceimpl{
private influxdbutil influxdb;
public void intodb() {
influxdb = influxdbutil.setup();
map<string, string> tags = new hashmap<>();
map<string, object> fields = new hashmap<>();
tags.put("tag_name",info.getkey());
fields.put("tag_value",code);
fields.put("timampest", df.format(new date()));
influxdb.insert(tags, fields);
}
}
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持快网idc。
原文链接：https://blog.csdn.net/qq_36004521/article/details/80101608
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