serverlogin.java

实现PKI/CA的数字签名部分

package dssserver;




import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class ServerLogin {

	private static Text tloginname;
	private static Text tloginpswd;
	/**
	 * Launch the application
	 * @param args
	 */
	public static void main(String[] args) {
		final Display display = Display.getDefault();
		final Shell shell = new Shell();
		shell.setSize(307, 293);
		shell.setText("数字签名系统服务器登录");
	
		shell.open();

		tloginname = new Text(shell, SWT.BORDER);
		tloginname.setBounds(105, 83, 129, 25);

		tloginpswd = new Text(shell, SWT.BORDER);
		tloginpswd.setBounds(105, 133, 129, 25);

		final Button buttonlogin = new Button(shell, SWT.NONE);
		buttonlogin.setText("确定");
		buttonlogin.setBounds(41, 199, 44, 23);
		buttonlogin.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(final SelectionEvent e) {
				String loginname = tloginname.getText();
				String loginpswd = tloginpswd.getText();
				DataBase db = new DataBase();
				if(loginname.equals(""))
					MessageDialog.openWarning(null, "注意", "用户名不能为空");
				else if(loginpswd.equals(""))
					MessageDialog.openWarning(null, "注意", "密码不能为空");
				else if(!loginpswd.equals("")&&!loginname.equals("") ){
					if(db.checkuser(loginname, loginpswd)){
						MessageDialog.openWarning(null, "登录信息", "登录成功");
						display.dispose();
						ServerMain sapp =  new ServerMain();
						sapp.NewSocket();
					}
				    else{
				    	MessageDialog.openWarning(null, "登录信息", "登录失败");	
				     }
				}	
			}
		});
		

		final Button buttoncancel = new Button(shell, SWT.NONE);
		buttoncancel.setText("取消");
		buttoncancel.setBounds(190, 199, 44, 23);
		buttoncancel.addSelectionListener(new ButtoncancelSelectionListener());

		final Label labelname = new Label(shell, SWT.NONE);
		labelname.setText("用户:");
		labelname.setBounds(41, 86, 44, 16);

		final Label labelpswd = new Label(shell, SWT.NONE);
		labelpswd.setText("密码:");
		labelpswd.setBounds(41, 136, 44, 13);

		final Label labellogin = new Label(shell, SWT.NONE);
		labellogin.setText("请填写用户名密码:");
		labellogin.setBounds(10, 41, 109, 13);
		
		shell.layout();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
	}
	
	private static final class ButtoncancelSelectionListener extends SelectionAdapter{
		public void widgetSelected(SelectionEvent e){
			tloginname.setText("");	
			tloginpswd.setText("");	
		}	
	}
	

}