add code example
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c03fdceb79
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@ -8,27 +8,27 @@ import java.util.Properties;
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import com.taosdata.jdbc.TSDBDriver;
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public class JNIConnectExample {
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public static void main(String[] args) throws SQLException {
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// use
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// String jdbcUrl = "jdbc:TAOS://localhost:6030/dbName?user=root&password=taosdata";
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// if you want to connect a specified database named "dbName".
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String jdbcUrl = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
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Properties connProps = new Properties();
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connProps.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
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connProps.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
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connProps.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
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// ANCHOR: main
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public static void main(String[] args) throws SQLException {
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// use
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// String jdbcUrl = "jdbc:TAOS://localhost:6030/dbName?user=root&password=taosdata";
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// if you want to connect a specified database named "dbName".
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String jdbcUrl = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
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Properties connProps = new Properties();
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connProps.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
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connProps.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
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connProps.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
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try {
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Connection conn = DriverManager.getConnection(jdbcUrl, connProps);
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System.out.println("Connected");
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try (Connection conn = DriverManager.getConnection(jdbcUrl, connProps)) {
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System.out.println("Connected");
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// you can use the connection for execute SQL here
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// you can use the connection for execute SQL here
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conn.close();
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} catch (SQLException ex) {
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// handle any errors
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System.out.println("SQLException: " + ex.getMessage());
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}
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} catch (SQLException ex) {
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// handle any errors
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System.out.println("SQLException: " + ex.getMessage());
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}
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}
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// ANCHOR_END: main
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}
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@ -5,18 +5,18 @@ import java.sql.DriverManager;
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import java.sql.SQLException;
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public class RESTConnectExample {
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// ANCHOR: main
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public static void main(String[] args) throws SQLException {
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String jdbcUrl = "jdbc:TAOS-RS://localhost:6041?user=root&password=taosdata";
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try (Connection conn = DriverManager.getConnection(jdbcUrl)){
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System.out.println("Connected");
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// ANCHOR: main
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public static void main(String[] args) throws SQLException {
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String jdbcUrl = "jdbc:TAOS-RS://localhost:6041?user=root&password=taosdata";
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try (Connection conn = DriverManager.getConnection(jdbcUrl)){
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System.out.println("Connected");
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// you can use the connection for execute SQL here
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// you can use the connection for execute SQL here
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} catch (SQLException ex) {
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// handle any errors
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System.out.println("SQLException: " + ex.getMessage());
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}
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} catch (SQLException ex) {
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// handle any errors
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System.out.println("SQLException: " + ex.getMessage());
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}
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// ANCHOR_END: main
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}
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// ANCHOR_END: main
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}
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@ -8,23 +8,23 @@ import java.sql.SQLException;
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import java.util.Properties;
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public class WSConnectExample {
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// ANCHOR: main
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public static void main(String[] args) throws SQLException {
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// use
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// String jdbcUrl = "jdbc:TAOS-RS://localhost:6041/dbName?user=root&password=taosdata";
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// if you want to connect a specified database named "dbName".
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String jdbcUrl = "jdbc:TAOS-RS://localhost:6041?user=root&password=taosdata";
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Properties connProps = new Properties();
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connProps.setProperty(TSDBDriver.PROPERTY_KEY_BATCH_LOAD, "true");
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try (Connection conn = DriverManager.getConnection(jdbcUrl, connProps)){
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System.out.println("Connected");
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// ANCHOR: main
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public static void main(String[] args) throws SQLException {
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// use
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// String jdbcUrl = "jdbc:TAOS-RS://localhost:6041/dbName?user=root&password=taosdata";
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// if you want to connect a specified database named "dbName".
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String jdbcUrl = "jdbc:TAOS-RS://localhost:6041?user=root&password=taosdata";
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Properties connProps = new Properties();
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connProps.setProperty(TSDBDriver.PROPERTY_KEY_BATCH_LOAD, "true");
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try (Connection conn = DriverManager.getConnection(jdbcUrl, connProps)){
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System.out.println("Connected");
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// you can use the connection for execute SQL here
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// you can use the connection for execute SQL here
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} catch (SQLException ex) {
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// handle any errors
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System.out.println("SQLException: " + ex.getMessage());
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}
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} catch (SQLException ex) {
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// handle any errors
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System.out.println("SQLException: " + ex.getMessage());
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}
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// ANCHOR_END: main
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}
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// ANCHOR_END: main
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}
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@ -388,7 +388,7 @@ properties 中的配置参数如下:
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<Tabs defaultValue="java" groupId="lang">
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<TabItem label="Java" value="java">
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```java
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{{#include docs/examples/java/src/main/java/com/taos/example/JNIConnectExample.java}}
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{{#include docs/examples/java/src/main/java/com/taos/example/JNIConnectExample.java:main}}
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```
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</TabItem>
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<TabItem label="Python" value="python">
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@ -0,0 +1,57 @@
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package com.taosdata.example;
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import com.taosdata.jdbc.AbstractStatement;
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import java.sql.*;
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import java.util.Properties;
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public class JdbcCreatDBDemo {
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private static final String host = "localhost";
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private static final String dbName = "test";
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private static final String tbName = "weather";
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private static final String user = "root";
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private static final String password = "taosdata";
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public static void main(String[] args) throws SQLException {
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final String url = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
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// get connection
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Properties properties = new Properties();
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properties.setProperty("charset", "UTF-8");
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properties.setProperty("locale", "en_US.UTF-8");
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properties.setProperty("timezone", "UTC-8");
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System.out.println("get connection starting...");
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// ANCHOR: create_db_and_table
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try (Connection connection = DriverManager.getConnection(url, properties);
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Statement stmt = connection.createStatement()) {
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// create database
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int rowsAffected = stmt.executeUpdate("CREATE DATABASE IF NOT EXISTS power");
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// you can check rowsAffected here
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assert rowsAffected == 0;
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// use database
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rowsAffected = stmt.executeUpdate("USE power");
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// you can check rowsAffected here
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assert rowsAffected == 0;
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// create table
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rowsAffected = stmt.executeUpdate("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
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// you can check rowsAffected here
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assert rowsAffected == 0;
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} catch (SQLException ex) {
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// handle any errors
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System.out.println("SQLException: " + ex.getMessage());
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}
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// ANCHOR_END: create_db_and_table
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}
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private static void printResult(ResultSet resultSet) throws SQLException {
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Util.printResult(resultSet);
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}
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}
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@ -0,0 +1,49 @@
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package com.taosdata.example;
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import com.taosdata.jdbc.AbstractStatement;
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import java.sql.*;
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import java.util.Properties;
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public class JdbcInsertDataDemo {
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private static final String host = "localhost";
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private static final String dbName = "test";
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private static final String tbName = "weather";
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private static final String user = "root";
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private static final String password = "taosdata";
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public static void main(String[] args) throws SQLException {
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final String url = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
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// get connection
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Properties properties = new Properties();
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properties.setProperty("charset", "UTF-8");
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properties.setProperty("locale", "en_US.UTF-8");
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properties.setProperty("timezone", "UTC-8");
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System.out.println("get connection starting...");
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// ANCHOR: insert_data
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try (Connection connection = DriverManager.getConnection(url, properties);
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Statement stmt = connection.createStatement()) {
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// insert data, please make sure the database and table are created before
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String insertQuery = "INSERT INTO " +
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"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
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"VALUES " +
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"(NOW + 1a, 10.30000, 219, 0.31000) " +
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"(NOW + 2a, 12.60000, 218, 0.33000) " +
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"(NOW + 3a, 12.30000, 221, 0.31000) " +
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"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
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"VALUES " +
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"(NOW + 1a, 10.30000, 218, 0.25000) ";
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int affectedRows = stmt.executeUpdate(insertQuery);
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// you can check affectedRows here
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System.out.println("insert " + affectedRows + " rows.");
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} catch (SQLException ex) {
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// handle any errors
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System.out.println("SQLException: " + ex.getMessage());
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}
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// ANCHOR_END: insert_data
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}
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}
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@ -0,0 +1,55 @@
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package com.taosdata.example;
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import com.taosdata.jdbc.AbstractStatement;
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import java.sql.*;
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import java.util.Properties;
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public class JdbcQueryDemo {
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private static final String host = "localhost";
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private static final String dbName = "test";
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private static final String tbName = "weather";
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private static final String user = "root";
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private static final String password = "taosdata";
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public static void main(String[] args) throws SQLException {
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final String url = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
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// get connection
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Properties properties = new Properties();
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properties.setProperty("charset", "UTF-8");
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properties.setProperty("locale", "en_US.UTF-8");
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properties.setProperty("timezone", "UTC-8");
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System.out.println("get connection starting...");
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// ANCHOR: query_data
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try (Connection connection = DriverManager.getConnection(url, properties);
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Statement stmt = connection.createStatement();
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// query data, make sure the database and table are created before
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ResultSet resultSet = stmt.executeQuery("SELECT * FROM power.meters")) {
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Timestamp ts;
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float current;
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String location;
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while (resultSet.next()) {
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ts = resultSet.getTimestamp(1);
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current = resultSet.getFloat(2);
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// we recommend using the column name to get the value
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location = resultSet.getString("location");
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// you can check data here
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System.out.printf("%s, %f, %s\n", ts, current, location);
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}
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} catch (SQLException ex) {
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// handle any errors
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System.out.println("SQLException: " + ex.getMessage());
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}
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// ANCHOR_END: query_data
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}
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private static void printResult(ResultSet resultSet) throws SQLException {
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Util.printResult(resultSet);
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}
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}
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@ -0,0 +1,55 @@
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package com.taosdata.example;
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import com.taosdata.jdbc.AbstractStatement;
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import java.sql.*;
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import java.util.Properties;
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public class JdbcReqIdDemo {
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private static final String host = "localhost";
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private static final String dbName = "test";
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private static final String tbName = "weather";
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private static final String user = "root";
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private static final String password = "taosdata";
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public static void main(String[] args) throws SQLException {
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final String url = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
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// get connection
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Properties properties = new Properties();
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properties.setProperty("charset", "UTF-8");
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properties.setProperty("locale", "en_US.UTF-8");
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properties.setProperty("timezone", "UTC-8");
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System.out.println("get connection starting...");
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// ANCHOR: with_reqid
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try (Connection connection = DriverManager.getConnection(url, properties);
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// Create a statement that allows specifying a request ID
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AbstractStatement aStmt = (AbstractStatement) connection.createStatement()) {
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boolean hasResultSet = aStmt.execute("CREATE DATABASE IF NOT EXISTS power", 1L);
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assert !hasResultSet;
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int rowsAffected = aStmt.executeUpdate("USE power", 2L);
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assert rowsAffected == 0;
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try (ResultSet rs = aStmt.executeQuery("SELECT * FROM meters limit 1", 3L)) {
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while (rs.next()) {
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Timestamp timestamp = rs.getTimestamp(1);
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System.out.println("timestamp = " + timestamp);
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}
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}
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} catch (SQLException ex) {
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// handle any errors
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System.out.println("SQLException: " + ex.getMessage());
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}
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// ANCHOR_END: with_reqid
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}
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private static void printResult(ResultSet resultSet) throws SQLException {
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Util.printResult(resultSet);
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}
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}
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