1.下载mysql-connector-java-5.1.31.jar包，放在apache-jmeter-5.0\lib\ext目录下

2.数据库驱动类和URL格式：

Datebase	Driver class	Database URL
	com..jdbc.Driver	jdbc:mysql://host:port/{dbname}
PostgreSQL	org.postgresql.Driver	jdbc:postgresql:{dbname}
Oracle	oracle.jdbc.driver.OracleDriver	jdbc:oracle:thin:@//host:port/service OR jdbc:oracle:thin:@(description=(address=(host={mc-name}) (protocol=tcp)(port={port-no}))(connect_data=(sid={sid})))
Ingres (2006)	ingres.jdbc.IngresDriver	jdbc:ingres://host:port/db[;attr=value]
MSSQL	com.microsoft.sqlserver.jdbc.SQLServerDriver 或者 net.sourceforge.jtds.jdbc.Driver	jdbc:sqlserver://IP:port;databaseName=DBname 或者 jdbc:jtds:sqlserver://localhost:1433/"+"library"

3.填写数据库：连接池名字、host、port、dbname

4.在JDBC Request 引用连接池名字，填写sql