如何使用cmd中的java -D连接到SQL Server

Question

I want to run a java program that will connect to a SQL server. The credentials to that server I would like to get from cmd by using the -D flag.

Could someone write how do I exactly do it and how do I retrieve those properties (System.getProperty()??? and what is the parameter I need to write in).

Answer 1

To learn more about JDBC connections, here you find a quite good tutorial: http://www.tutorialspoint.com/jdbc/jdbc-create-database.htm

Re -D, taking the example from the link above, you simply replace

static final String USER = "username";
static final String PASS = "password";

with

static final String USER = System.getProperty("username");
static final String PASS = System.getProperty("password");

Then you can pass the credentials as in

java -jar -Dusername=<username> -Dpassword=<password> the.jar

Another note: Passing credentials via command line is insecure, because they are also fully visible in the process list.