jdbc:mysql://localhost:3306/Myapp

jdbc:oracle:thin:@localhost:1521:xe

RDBMS   JDBC driver name                   URL format

MySQL   com.mysql.jdbc.Driver                  jdbc:mysql://hostname/ databaseName
ORACLE  oracle.jdbc.driver.OracleDriver        jdbc:oracle:thin:@hostname:portNumber:databaseName
DB2    COM.ibm.db2.jdbc.net.DB2Driver         jdbc:db2:hostname:port Number/databaseName
Sybase  com.sybase.jdbc.SybDriver              jdbc:sybase:Tds:hostname: port Number/databaseNam