//Oracle8/8i/9i数据库（thin模式）    
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();   
String url="jdbc:oracle:thin:@localhost:1521:orcl"; //orcl为数据库的SID   
String user="test";   
String password="test";   
Connection conn= DriverManager.getConnection(url,user,password);  

//DB2数据库     
Class.forName("com.ibm.db2.jdbc.app.DB2Driver ").newInstance();   
String url="jdbc:db2://localhost:5000/sample"; //sample为你的数据库名   
String user="admin";   
String password="";   
Connection conn= DriverManager.getConnection(url,user,password);  
  
//Sql Server7.0/2000数据库   
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();   
String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=mydb";   
//mydb为数据库   
String user="sa";   
String password="";   
Connection conn= DriverManager.getConnection(url,user,password);  
  
//Sybase数据库    
Class.forName("com.sybase.jdbc.SybDriver").newInstance();   
String url =" jdbc:sybase:Tds:localhost:5007/myDB";//myDB为你的数据库名   
Properties sysProps = System.getProperties();   
SysProps.put("user","userid");   
SysProps.put("password","user_password");   
Connection conn= DriverManager.getConnection(url, SysProps);  

//Informix数据库   
Class.forName("com.informix.jdbc.IfxDriver").newInstance();   
String url = "jdbc:informix-sqli://123.45.67.89:1533/myDB:INFORMIXSERVER=myserver;   
user=testuser;password=testpassword"; //myDB为数据库名   
Connection conn= DriverManager.getConnection(url);  
 
//MySQL数据库   
    String user = "patchouli";
    String password ="123456";
    String url = "jdbc:mysql://192.168.1.63:3306/test";
    String device="org.gjt.mm.mysql.Driver";        
    Class.forName(device);
    conn = DriverManager.getConnection(url, user, password);

//PostgreSQL数据库   
Class.forName("org.postgresql.Driver").newInstance();   
String url ="jdbc:postgresql://localhost/myDB" //myDB为数据库名   
String user="myuser";   
String password="mypassword";   
Connection conn= DriverManager.getConnection(url,user,password);  
  
//access数据库直连用ODBC的  
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver") ;  
String url="jdbc:odbc:Driver={MicroSoft Access Driver (*.mdb)};DBQ="+application.getRealPath("/Data/ReportDemo.mdb");  
Connection conn = DriverManager.getConnection(url,"","");  
Statement stmtNew=conn.createStatement() ;