loginhandler.java

可以对名片进行增删改查,用户管理包括增删改查等,对名片查询时可以模糊查询

package card;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2007</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class LoginHandler implements ActionListener {
    LoginFrame lf;
    usermodel um = new usermodel();
    DatabaseOperate dop=new DatabaseOperate();
    public LoginHandler() {
    }
    public void actionPerformed(ActionEvent e) {
        if (e.getSource().equals(lf.btnLogin)) {
            if (checkInput()) {
                if(checkInfo()){
                    Static.setUmodel(um);//程序共享属性 以便得知当前操作员的用户名
                    new SelectFrame();//替换主窗口类
                    lf.dispose();
                    Static.getTodayBirthdayDialog();
                }
            }
        }
        if (e.getSource().equals(lf.btnRes)) {
            System.exit(0);
        }
    }

    public boolean checkInfo() {
         boolean b = true;
         um.setUsername(lf.txtUserName.getText().trim());
         um.setPassword(String.valueOf(lf.psUserPassword.getPassword()).trim());
         int e=dop.checkLoginInfo(um);
             if (e != 0) {
                 if (e == 1) {
                     showErr(4);
                 } else if (e == 2) {
                     showErr(3);
                 }
                 return false;
             }
         return b;
    }

    public boolean checkInput() {
        boolean b = true;
        if (lf.txtUserName.getText().equals("")) {
            showErr(1);
            b = false;
        } else if (lf.psUserPassword.getPassword().length == 0) {
            showErr(2);
            b = false;
        }
        return b;
    }

    public void showErr(int i) {
        String[] err = {"请输入用户名！", "请输入密码！", "无此用户名！", "密码不正确！"};
        for (int j = 0; j < err.length; j++) {
            if (j == i - 1) {
                lf.lblErr.setText(err[j]);
            }
        }
    }


}