java 连接 Mysql,Oracle,MSSQL

    MySql:

Class.forName("com.mysql.jdbc.Driver"); 
String url = "jdbc:mysql://127.0.0.1/myDatabase"; 
String user = "user"; 
String password = "password"; 
Connection conn = DriverManager.getConnection(url, user, password); 

 

    Oracle:

   

Class.forName("oracle.jdbc.driver.OracleDriver"); 
String url = "jdbc:oracle:thin:@127.0.0.1:1521:myOracleSID"; 
String user = "user"; 
String password = "password"; 
Connection conn = DriverManager.getConnection(url, user, password); 

 

   SQLServer:

 

Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver"); 
String url = "jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=myDbName"; 
String user = "user"; 
String password = "password"; 
Connection conn = DriverManager.getConnection(url, user, password);