1. 添加maven依赖包 dependency groupIdorg.apache.calcite.avatica/groupId artifactIdavatica-core/artifactId version1.15.0/version/dependency 2. 编写工具类 package com.hnu.druid;import org.apache.calcite.avatica.AvaticaConnection;imp
1. 添加maven依赖包
<dependency> <groupId>org.apache.calcite.avatica</groupId> <artifactId>avatica-core</artifactId> <version>1.15.0</version> </dependency>
2. 编写工具类
package com.hnu.druid; import org.apache.calcite.avatica.AvaticaConnection; import org.apache.calcite.avatica.AvaticaStatement; import org.springframework.stereotype.Component; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.util.List; import java.util.Properties; /** * @description: * @author: YUANHX * @create: 7:11 下午 **/ @Component public class DruidJdbcUtil { private static ThreadLocal<AvaticaConnection> threadLocal = new ThreadLocal<>(); private static final String DRUID_URL = "jdbc:avatica:remote:url=http://172.16.0.160:8888/druid/v2/sql/avatica/"; /** * 打开连接 * @param * @return * @throws SQLException */ public static AvaticaConnection connection() throws SQLException { Properties properties = new Properties(); AvaticaConnection connection = (AvaticaConnection) DriverManager.getConnection(DRUID_URL, properties); threadLocal.set(connection); return connection; } /** * 关闭连接 * @throws SQLException */ public static void closeConnection() throws SQLException{ System.out.println("关闭线程:"+threadLocal.get()); AvaticaConnection conn = threadLocal.get(); if(conn != null){ conn.close(); threadLocal.remove(); } } /** * 根据sql查询结果 * @param * @param sql * @return * @throws SQLException */ public static ResultSet executeQuery (String sql) throws SQLException{ AvaticaStatement statement = connection().createStatement(); ResultSet resultSet = statement.executeQuery(sql); return resultSet; } /*public static Object crud(String sql, Class clazz, List<Object> params) throws SQLException{ AvaticaStatement statement = connection().createStatement(); Object obj = null; for (int i = 0; i < params.size(); i++) { statement.set } return obj; }*/ public static void main(String[] args) { try { String sql = "SELECT * FROM \"vehicleCondition\" limit 20"; for (int i = 0; i < 5; i++) { ResultSet resultSet = executeQuery(sql); System.out.println("开始连接"+i + "; 连接线程:"+threadLocal.get()); while(resultSet.next()){ String equipmentCode = resultSet.getString("EquipmentCode"); String vkaCode = resultSet.getString("VKACode"); // System.out.println(equipmentCode + " ; "+ vkaCode); } closeConnection(); } } catch (SQLException throwables) { throwables.printStackTrace(); } } }
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