在Eclipse中用Java和MySql数据库实现登录功能

try...{


String managerName="";


String managerPassword="";



//是一个访问数据库的封装类，具体代码在
//http://blog.csdn.net/ingenuus/archive/2007/06/21/1660217.aspx


ConDB conn = new ConDB();


String sql = "select * from loguser";//loguser为表名


conn.executeQuery(sql);





ResultSet resultSet = conn.executeQuery(sql);


while(resultSet.next())




...{


managerName = resultSet.getString("userName");


managerPassword = resultSet.getString("userPassword");



//此方法是采用SWT做的，以下的text和text_1,是输入用户名和密码的框
//相当与J***A中的JTextField和JPasswordField类型的变量


if(text.getText().toString().equals(managerName))




...{


if(text_1.getText().toString().equals(managerPassword))




...{


SelectService selectService = new SelectService();


shell.setVisible(false);


selectService.open();


}


else




...{


JOptionPane.showMessageDialog(null,"请输入正确的密码！！！");


text_1.setText("");


}





}


else




...{


JOptionPane.showMessageDialog(null,"请输入正确的用户名！！！");


text.setText("");


}


}//end while





}catch(SQLException ee)




...{


System.out.println(ee);


}