Oracle:

??Class.forName("oracle.jdbc.driver.OracleDriver");
??Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","zhaozy");
??System.out.println(conn);

?

Mysql:

??Class.forName("com.mysql.jdbc.Driver");
??Connection conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/drp?user=root&password=zhaozy");
??System.out.println(conn);

?

Sybase(ASE):

?? Class.forName("com.sybase.jdbc3.jdbc.SybDriver");
? ?Connection conn=DriverManager.getConnection("jdbc:sybase:Tds:10.32.17.154:5000/master","sa","");
?? System.out.println(conn);

DB2:

??? Class.forName("com.ibm.db2.jcc.DB2Driver").newInstance();

??? String url="jdbc:db2://192.168.10.11:50001/vendbs"; //vendbs为数据库名
??? String user="ven";
??? String password="111111";

??? Connection conn= DriverManager.getConnection(url,user,password);