110 lines
3.6 KiB
Java
110 lines
3.6 KiB
Java
package cn.ac.iie.utils;
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import com.alibaba.druid.pool.DruidDataSource;
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import com.alibaba.druid.pool.DruidPooledConnection;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.sql.Connection;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.sql.Statement;
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import java.util.Properties;
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public class ClickhouseConnect {
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private static final Logger LOG = LoggerFactory.getLogger(ClickhouseConnect.class);
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private static DruidDataSource dataSource = null;
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private static ClickhouseConnect dbConnect = null;
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private static Properties props = new Properties();
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static {
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getDbConnect();
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}
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private static void getDbConnect() {
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try {
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if (dataSource == null) {
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dataSource = new DruidDataSource();
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props.load(ClickhouseConnect.class.getClassLoader().getResourceAsStream("clickhouse.properties"));
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//设置连接参数
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dataSource.setUrl("jdbc:clickhouse://" + props.getProperty("db.id"));
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dataSource.setDriverClassName(props.getProperty("drivers"));
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dataSource.setUsername(props.getProperty("mdb.user"));
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dataSource.setPassword(props.getProperty("mdb.password"));
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//配置初始化大小、最小、最大
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dataSource.setInitialSize(Integer.parseInt(props.getProperty("initialsize")));
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dataSource.setMinIdle(Integer.parseInt(props.getProperty("minidle")));
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dataSource.setMaxActive(Integer.parseInt(props.getProperty("maxactive")));
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//配置获取连接等待超时的时间
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dataSource.setMaxWait(30000);
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//配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
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dataSource.setTimeBetweenEvictionRunsMillis(2000);
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//防止过期
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dataSource.setValidationQuery("SELECT 1");
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dataSource.setTestWhileIdle(true);
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dataSource.setTestOnBorrow(true);
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dataSource.setKeepAlive(true);
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}
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} catch (Exception e) {
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LOG.error(e.getMessage());
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}
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}
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/**
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* 数据库连接池单例
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*
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* @return dbConnect
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*/
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public static synchronized ClickhouseConnect getInstance() {
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if (null == dbConnect) {
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dbConnect = new ClickhouseConnect();
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}
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return dbConnect;
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}
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/**
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* 返回druid数据库连接
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*
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* @return 连接
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* @throws SQLException sql异常
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*/
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public DruidPooledConnection getConnection() throws SQLException {
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return dataSource.getConnection();
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}
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/**
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* 清空PreparedStatement、Connection对象，未定义的置空。
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*
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* @param pstmt PreparedStatement对象
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* @param connection Connection对象
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*/
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public void clear(Statement pstmt, Connection connection) {
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try {
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if (pstmt != null) {
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pstmt.close();
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}
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if (connection != null) {
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connection.close();
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}
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} catch (SQLException e) {
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LOG.error(e.getMessage());
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}
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}
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public ResultSet executorQuery(String query,Connection connection,Statement pstm){
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// Connection connection = null;
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// Statement pstm = null;
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try {
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connection = getConnection();
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pstm = connection.createStatement();
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return pstm.executeQuery(query);
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}catch (Exception e){
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LOG.error(e.getMessage());
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return null;
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}
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}
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}
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