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

com.oracle

ojdbc6

11.g.6

com.zaxxer

HikariCP

2.4.7

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！");

}

}

}

原文：https://www.cnblogs.com/caoleiCoding/p/11140701.html