hello sir I have deploy my web app. but i having problem for connection with mysql database my code is below public static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";static final String DB_URL = "jdbc:mysql://localhost:3306/myDB";static final String USER = "myusername";static final String PASS = "mypassword"; please assist me for removing error. also i cannot able to connect to remote mysql. so please provide me syntax for conection. (i have used wildcard for access all ip) . Is there any way to change particular file without uploading again war file. because my war file is big. it takes too time. thanks