用户登录的验证完整程序

public String validateUser(String inputUserid, String inputPwd)

throws SQLException{

String returnString = null;

String dbUserid = "userid"; // Your Database user id

String dbPassword = "password" ; // Your Database password

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

Connection con = DriverManager.getConnection("jdbc:odbc:myDriver",

dbUserid ,dbPassword );

Statement stmt = con.createStatement();

String sql= "select USERID from USERTABLE where USERID = "" +

inputUserid + "" and PASSWORD = "" + inputPwd +"" ;" ;

ResultSet rs = stmt.executeQuery(sql);

if (rs.next())

{

returnString = rs.getString("USERID");

}

stmt.close();

con.close();

return returnString ;

}