1.Oracle8/8i/9i/10i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);

　 2.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);

　 3.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为数据库名
    String user="sa"; 
    String password=""; 
    Connection conn= DriverManager.getConnection(url,user,password);

　 4.Sybase数据库

Class.forName("com.sybase.jdbc.SybDriver").newInstance(); 
    String url =" jdbc:sybase:Tds:localhost:5007/myDB";//myDB为数据库名 
    Properties sysProps = System.getProperties(); 
    SysProps.put("user","userid"); 
    SysProps.put("password","user_password"); 
    Connection conn= DriverManager.getConnection(url, SysProps);

　 5.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);

　 6.MySQL数据库

Class.forName("org.gjt.mm.mysql.Driver").newInstance();  
    String url ="jdbc:mysql://localhost/myDB?user=soft&password=soft1234&useUnicode=true&characterEncoding=8859_1" 
    //myDB为数据库名 
    Connection conn= DriverManager.getConnection(url);

　 7.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);

　 8.access数据库直连用ODBC

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() ;