Lindorm:Öğretici: Lindorm için JDBC sürücüsü kullanarak LindormTSDB'ye bağlanma ve kullanma

JAR dosyasını manuel olarak indirme

Maven Central'dan lindorm-all-client JAR paketini indirin. Gereksinimlerinize uygun sürümü seçin. Örneğin, 2.1.5 sürümünü yüklemek için lindorm-all-client-2.1.5.jar dosyasını indirin ve proje sınıf yoluna (classpath) ekleyin.

Maven bağımlılığını ekleme (önerilen)

Aşağıdaki bağımlılığı pom.xml dosyanıza ekleyin:

<dependency>
    <groupId>com.aliyun.lindorm</groupId>
    <artifactId>lindorm-all-client</artifactId>
    <version>2.2.1.3</version>
</dependency>

Gereksinimlerinize göre sürümü belirtin.

jdbc:lindorm:tsdb:url=http://<endpoint>:<port>

import java.sql.*;

class Test {
    public static void main(String[] args) {
        // Replace with your LindormTSDB endpoint and port.
        String url = "jdbc:lindorm:tsdb:url=http://ld-bp12pt80qr38p****-proxy-tsdb-pub.lindorm.rds.aliyuncs.com:8242";
        Connection conn = null;

        try {
            conn = DriverManager.getConnection(url);
            try (Statement stmt = conn.createStatement()) {
                // Create a time series table in the default database.
                // device_id and region are TAG columns (dimensions for filtering).
                stmt.execute("CREATE TABLE sensor1 (device_id VARCHAR TAG, region VARCHAR TAG, time TIMESTAMP, temperature DOUBLE, humidity DOUBLE, PRIMARY KEY(device_id))");

                // Insert multiple rows in a single batch to reduce round trips.
                stmt.addBatch("INSERT INTO sensor1(device_id, region, time, temperature, humidity) values('F07A1260','north-cn','2021-04-22 15:33:00',12.1,45)");
                stmt.addBatch("INSERT INTO sensor1(device_id, region, time, temperature, humidity) values('F07A1260','north-cn','2021-04-22 15:33:10',13.2,47)");
                stmt.addBatch("INSERT INTO sensor1(device_id, region, time, temperature, humidity) values('F07A1260','north-cn','2021-04-22 15:33:20',10.6,46)");
                stmt.addBatch("INSERT INTO sensor1(device_id, region, time, temperature, humidity) values('F07A1261','south-cn','2021-04-22 15:33:00',18.1,44)");
                stmt.addBatch("INSERT INTO sensor1(device_id, region, time, temperature, humidity) values('F07A1261','south-cn','2021-04-22 15:33:10',19.7,44)");
                stmt.executeBatch();
                stmt.clearBatch();
            }

            // Always specify a time range to limit the amount of data scanned.
            try (PreparedStatement pstmt = conn.prepareStatement(
                    "SELECT device_id, region, time, temperature, humidity FROM sensor1 WHERE time >= ? AND time <= ?")) {
                pstmt.setTimestamp(1, Timestamp.valueOf("2021-04-22 15:33:00"));
                pstmt.setTimestamp(2, Timestamp.valueOf("2021-04-22 15:33:20"));
                try (ResultSet rs = pstmt.executeQuery()) {
                    while (rs.next()) {
                        String device_id  = rs.getString("device_id");
                        String region      = rs.getString("region");
                        Timestamp time     = rs.getTimestamp("time");
                        Double temperature = rs.getDouble("temperature");
                        Double humidity    = rs.getDouble("humidity");
                        System.out.printf("%s %s %s %f %f\n", device_id, region, time, temperature, humidity);
                    }
                }
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                if (conn != null) conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}

F07A1261 south-cn 2021-04-22 15:33:00.0 18.100000 44.000000
F07A1261 south-cn 2021-04-22 15:33:10.0 19.700000 44.000000
F07A1260 north-cn 2021-04-22 15:33:00.0 12.100000 45.000000
F07A1260 north-cn 2021-04-22 15:33:10.0 13.200000 47.000000
F07A1260 north-cn 2021-04-22 15:33:20.0 10.600000 46.000000