性能超过DRUID的最强数据库连接池——HikariCP相关配置及简单示例

• 在配置application.yml时，对hikari的配置会有这样一个字段validationQuery。
• validationQuery是用来验证数据库连接的查询语句，这个查询语句必须是至少返回一条数据的SELECT语句。每种数据库都有各自的验证语句。

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

使用实例

核心依赖

<!-- 数据库驱动 -->
 <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>11.g.6</version>
        </dependency>

<!-- 连接池 -->
        <!-- 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

# 这里的配置仅适用于Orcale数据库，其他数据库参照官方说明
# 设置数据库驱动
dataSourceClassName=oracle.jdbc.pool.OracleDataSource
# 设置数据库用户名
dataSource.user=user_test
# 设置用户密码
dataSource.password=user_test
# 设置数据库名
dataSource.databaseName=test
# 设置数据库端口
dataSource.portNumber=1521
# 设置数据库地址
dataSource.serverName=192.168.1.11
# 设置驱动形式
dataSource.driverType=thin

常用数据库对应的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

获取数据库连接

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("获取数据源连接失败：" + 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("获取数据库连接失败！");
        }
    }
}