性能超過DRUID的最強數據庫鏈接池——HikariCP相關配置及簡單示例

• 在配置application.yml時，對hikari的配置會有這樣一個字段validationQuery。
• validationQuery是用來驗證數據庫鏈接的查詢語句，這個查詢語句必須是至少返回一條數據的SELECT語句。每種數據庫都有各自的驗證語句。

DataBase	validationQuery
hsqldb	select 1 from INFORMATION_SCHEMA.SYSTEM_USERS
Oracle	select 1 from dual
DB2	select 1 from sysibm.sysdummy1
MySql	select 1
Microsoft SqlServer	select1
postgresql	select version()
ingres	select 1
derby	values 1
H2	gi select 1

使用實例

核心依賴

<!-- 數據庫驅動 -->
 <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>11.g.6</version>
        </dependency>

<!-- 鏈接池 -->
        <!-- https://mvnrepository.com/artifact/com.zaxxer/HikariCP -->
        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
            <version>2.4.7</version>
        </dependency>

核心配置hikari.properties

# 這裏的配置僅適用於Orcale數據庫，其餘數據庫參照官方說明
# 設置數據庫驅動
dataSourceClassName=oracle.jdbc.pool.OracleDataSource
# 設置數據庫用戶名
dataSource.user=user_test
# 設置用戶密碼
dataSource.password=user_test
# 設置數據庫名
dataSource.databaseName=test
# 設置數據庫端口
dataSource.portNumber=1521
# 設置數據庫地址
dataSource.serverName=192.168.1.11
# 設置驅動形式
dataSource.driverType=thin

經常使用數據庫對應的dataSourceClassName

Database	Driver	DataSource class
Apache Derby	Derby	org.apache.derby.jdbc.ClientDataSource
Firebird	Jaybird	org.firebirdsql.ds.FBSimpleDataSource
H2	H2	org.h2.jdbcx.JdbcDataSource
HSQLDB	HSQLDB	org.hsqldb.jdbc.JDBCDataSource
IBM DB2	IBM JCC	com.ibm.db2.jcc.DB2SimpleDataSource
IBM Informix	IBM Informix	com.informix.jdbcx.IfxDataSource
MS SQL Server	Microsoft	com.microsoft.sqlserver.jdbc.SQLServerDataSource
MySQL	Connector/J	com.mysql.jdbc.jdbc2.optional.MysqlDataSource
MariaDB	MariaDB	org.mariadb.jdbc.MariaDbDataSource
Oracle	Oracle	oracle.jdbc.pool.OracleDataSource
OrientDB	OrientDB	com.orientechnologies.orient.jdbc.OrientDataSource
PostgreSQL	pgjdbc-ng	com.impossibl.postgres.jdbc.PGDataSource
PostgreSQL	PostgreSQL	org.postgresql.ds.PGSimpleDataSource
SAP MaxDB	SAP	com.sap.dbtech.jdbc.DriverSapDB
SQLite	xerial	org.sqlite.SQLiteDataSource
SyBase	jConnect	com.sybase.jdbc4.jdbc.SybDataSource

獲取數據庫鏈接

package lss.medicare.ydjy.webservice.kswebservice.data_source;

import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import javax.activation.DataSource;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * @ClassName HikariDataSourceConnection
 * @Description TODO
 * @Author syskey
 * @Date 2019/4/22 9:26
 * @Version 1.0
 **/
public class HikariConnection {
    private final static Logger log = LogManager.getLogger(HikariConnection.class);
    private static HikariDataSource dataSource;
    private static Connection connection;

    static {
        HikariConfig config = new HikariConfig("/hikari.properties");
        dataSource = new HikariDataSource(config);
    }

    public static Connection getInstance() {
        try {
            if (connection == null) {
                connection = dataSource.getConnection();
            }
        } catch (SQLException e) {
            e.printStackTrace();
            log.error("獲取數據源鏈接失敗：" + e);
        }
        return connection;
    }


    public static void main(String[] args) {
        final String sql = "select * from test ";
        try {
            Connection connection = getInstance();
            PreparedStatement ps = connection.prepareStatement(sql);
            ResultSet rs = ps.executeQuery();
            while (rs.next()) {
                log.info(rs.getString(1));
            }
        } catch (SQLException e) {
            e.printStackTrace();
            log.error("獲取數據庫鏈接失敗！");
        }
    }
}