學習java有一年多了，一直在做web方面的練習，在一個項目中發現需要用到GUI的相關知識，結果沒法做出來，網上這方面的文章又不是很多，所有只好自己硬著頭皮從頭再學一遍了，不過學習后發現，其實GUI是非常有趣的，他并不像WEB程序一樣依賴互聯網，而且還有許多布局和android相差不是很大，這才發現自己竟又愛上GUI的開發了，不多說了，直接上代碼吧，相信有過android或相關界面開發的都明白這其中的道理。
先看看效果吧
1.登錄主界面
package edu.gzu.stuManager; import java.awt.EventQueue; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import java.awt.Toolkit; import javax.swing.JTextField; import edu.gzu.stuManager.Dao.UserLoginValid; import edu.gzu.stuManager.Domain.StudentInfo; import edu.gzu.stuManager.View.StudentMainView; import java.awt.Choice; import java.awt.Font; import java.awt.Button; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; public class MainUI { private JFrame frame; private JTextField textField; private JTextField textField_1; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { MainUI window = new MainUI(); window.frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the application. */ public MainUI() { initialize(); } /** * Initialize the contents of the frame. */ private void initialize() { frame = new JFrame(); frame.setTitle("/u6210/u7EE9/u7BA1/u7406/u7CFB/u7EDF/uFF08/u767B/u5F55/uFF09"); frame.setIconImage(Toolkit.getDefaultToolkit().getImage(MainUI.class.getResource("/image/func_list7_privmana.png"))); frame.setBounds(400, 250, 450, 300); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().setLayout(null); JLabel lblNewLabel = new JLabel("/u5B66/u751F/u6210/u7EE9/u7BA1/u7406/u7CFB/u7EDF/u7528/u6237/u767B/u5F55/uFF01"); lblNewLabel.setFont(new Font("宋體", Font.PLAIN, 16)); lblNewLabel.setBounds(111, 17, 287, 15); frame.getContentPane().add(lblNewLabel); JLabel lblNewLabel_1 = new JLabel("/u7528/u6237/u540D/uFF1A"); lblNewLabel_1.setFont(new Font("宋體", Font.PLAIN, 14)); lblNewLabel_1.setBounds(87, 67, 67, 15); frame.getContentPane().add(lblNewLabel_1); textField = new JTextField(); textField.setBounds(154, 64, 141, 21); frame.getContentPane().add(textField); textField.setColumns(10); JLabel label = new JLabel("/u5BC6 /u7801/uFF1A"); label.setFont(new Font("宋體", Font.PLAIN, 14)); label.setBounds(87, 108, 67, 15); frame.getContentPane().add(label); textField_1 = new JTextField(); textField_1.setColumns(10); textField_1.setBounds(154, 103, 141, 21); frame.getContentPane().add(textField_1); JLabel lblNewLabel_2 = new JLabel("/u6211/u7684/u8EAB/u4EFD/u662F/uFF1A"); lblNewLabel_2.setFont(new Font("宋體", Font.PLAIN, 14)); lblNewLabel_2.setBounds(105, 150, 97, 15); frame.getContentPane().add(lblNewLabel_2); final Choice choice = new Choice(); choice.setBounds(210, 147, 74, 21); choice.add("學生"); choice.add("教師"); choice.add("系統管理員"); frame.getContentPane().add(choice); Button button = new Button("/u767B/u5F55"); button.setBounds(87, 194, 76, 23); button.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent e) { String user=textField.getText(); String password=textField_1.getText(); String shenfen=choice.getSelectedItem(); if(user.equals("")||user==null){ JOptionPane.showMessageDialog(frame, shenfen+":您好，帳號不能為空！"); return; }else if(password.equals("")||password==null){ JOptionPane.showMessageDialog(frame, shenfen+":您好，密碼不能為空！"); return; }else{ StudentInfo stu=new StudentInfo(Integer.parseInt(user), Integer.parseInt(password),shenfen); UserLoginValid dao=new UserLoginValid(); String result=dao.isValid(stu); if("登錄成功！".equals(result)){ JOptionPane.showMessageDialog(frame,result); StudentMainView index=new StudentMainView(stu); JFrame frame2=index.getFrame(); frame2.setVisible(true); frame.dispose(); }else{ JOptionPane.showMessageDialog(frame,result); } } } }); frame.getContentPane().add(button); Button button_1 = new Button("/u53D6/u6D88"); button_1.setBounds(219, 194, 76, 23); frame.getContentPane().add(button_1); } } 2.登錄驗證邏輯
package edu.gzu.stuManager.Dao; import edu.gzu.stuManager.Domain.StudentInfo; public class UserLoginValid { public String isValid(StudentInfo stu){ int idnum=stu.getIdnum(); int password=stu.getPassword(); String idntify=stu.getIdentify(); String result=null; if("學生".equals(idntify)){ if(idnum==1207010209&&password==123){ stu.setName("劉明勝 同學"); result="登錄成功！"; }else{ result="學生帳號中不存在此用戶，請確認身份后再次登錄！"; } }else if("教師".equals(idntify)){ if(idnum==1174386356&&password==123){ stu.setName("劉明勝 老師"); result="登錄成功！"; }else{ result="教師帳號中不存在此用戶，請確認身份后再次登錄！"; } }else if("系統管理員".equals(idntify)){ if(idnum==999999&&password==123){ stu.setName("系統管理員"); result="登錄成功！"; }else{ result="系統管理員帳號中不存在此用戶，請確認身份后再次登錄！"; } } return result; } } 3.用戶對象（這是一個簡單bean）
package edu.gzu.stuManager.Domain; public class StudentInfo { private int idnum; private String name; private int password; private String identify; public StudentInfo(int idnum,int password, String identify) { super(); this.idnum = idnum; this.password = password; this.identify = identify; } public int getIdnum() { return idnum; } public void setIdnum(int idnum) { this.idnum = idnum; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getPassword() { return password; } public void setPassword(int password) { this.password = password; } public String getIdentify() { return identify; } public void setIdentify(String identify) { this.identify = identify; } } 4.登錄成功后的主界面
package edu.gzu.stuManager.View; import java.awt.Button; import java.awt.Canvas; import java.awt.Choice; import java.awt.Color; import java.awt.Toolkit; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JTextField; import edu.gzu.stuManager.Domain.StudentInfo; public class StudentMainView{ private JFrame frame; private JTextField textField; private JTextField textField_1; private JTextField textField_2; private JTextField textField_3; private StudentInfo info; /** * Create the frame. * @wbp.parser.entryPoint */ public StudentMainView(StudentInfo info) { this.info=info; } public JFrame getFrame(){ initialize(); return frame; } /** * Initialize the contents of the frame. * @wbp.parser.entryPoint */ public void initialize() { frame = new JFrame(); frame.setTitle("/u6210/u7EE9/u7BA1/u7406/u7CFB/u7EDF/uFF08/u5B66/u751F/u7248/uFF09"); frame.setIconImage(Toolkit.getDefaultToolkit().getImage(StudentMainView.class.getResource("/image/func_list7_privmana.png"))); frame.setBounds(300,150, 550, 300); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().setLayout(null); JLabel lblNewLabel = new JLabel("歡迎【"+info.getName()+"】登錄學生成績管理系統！"); lblNewLabel.setBounds(54, 10, 322, 15); frame.getContentPane().add(lblNewLabel); JPanel panel = new JPanel(); panel.setBounds(29, 52, 250, 180); frame.getContentPane().add(panel); panel.setLayout(null); JLabel lblNewLabel_1 = new JLabel("/u6210/u7EE9/u6570/u636E"); lblNewLabel_1.setBounds(94, 10, 65, 15); panel.add(lblNewLabel_1); JLabel lblNewLabel_2 = new JLabel("/u5B66/u53F7/uFF1A"); lblNewLabel_2.setBounds(22, 37, 40, 15); panel.add(lblNewLabel_2); textField = new JTextField(); textField.setBounds(72, 35, 154, 21); textField.setText(info.getIdnum()+""); panel.add(textField); textField.setColumns(10); JLabel lblNewLabel_3 = new JLabel("/u59D3/u540D/uFF1A"); lblNewLabel_3.setBounds(22, 67, 44, 15); panel.add(lblNewLabel_3); textField_1 = new JTextField(); textField_1.setBounds(72, 66, 154, 21); textField_1.setText(info.getName()); panel.add(textField_1); textField_1.setColumns(10); Canvas canvas = new Canvas(); canvas.setBackground(Color.BLUE); canvas.setBounds(22, 100, 205, 1); panel.add(canvas); JLabel lblNewLabel_4 = new JLabel("/u8BFE/u7A0B/u540D"); lblNewLabel_4.setBounds(22, 116, 47, 15); panel.add(lblNewLabel_4); JLabel lblNewLabel_5 = new JLabel("/u6210/u7EE9"); lblNewLabel_5.setBounds(160, 116, 43, 15); panel.add(lblNewLabel_5); textField_2 = new JTextField(); textField_2.setBounds(22, 140, 123, 21); panel.add(textField_2); textField_2.setColumns(10); textField_3 = new JTextField(); textField_3.setBounds(159, 140, 66, 21); panel.add(textField_3); textField_3.setColumns(10); JPanel panel_1 = new JPanel(); panel_1.setBounds(317, 52, 110, 180); frame.getContentPane().add(panel_1); panel_1.setLayout(null); JLabel lblNewLabel_6 = new JLabel("/u64CD/u4F5C/u83DC/u5355"); lblNewLabel_6.setBounds(15, 10, 54, 15); panel_1.add(lblNewLabel_6); Button button = new Button("/u7B2C/u4E00/u95E8/u8BFE/u7A0B"); button.setBounds(10, 31, 76, 23); panel_1.add(button); Button button_1 = new Button("/u4E0B/u4E00/u95E8/u8BFE/u7A0B"); button_1.setBounds(10, 61, 76, 23); panel_1.add(button_1); Button button_2 = new Button("/u4E0A/u4E00/u95E8/u8BFE/u7A0B"); button_2.setActionCommand("/u4E0A/u4E00/u95E8/u8BFE/u7A0B"); button_2.setBounds(10, 90, 76, 23); panel_1.add(button_2); Button button_3 = new Button("/u6700/u540E/u4E00/u95E8/u8BFE"); button_3.setBounds(10, 117, 76, 23); panel_1.add(button_3); Choice choice = new Choice(); choice.setBounds(10, 149, 76, 21); choice.add("選擇課程"); choice.add("高等數學"); choice.add("大學英語"); choice.add("馬列主義"); choice.add("毛澤東思想"); choice.add("計算機圖形學"); choice.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { Object[] objs=e.getItemSelectable().getSelectedObjects(); for(Object ob:objs){ // JOptionPane.showMessageDialog(frame, ob.toString()); if("高等數學".equals(ob.toString())){ textField_2.setText("高等數學"); textField_3.setText("98"); }else if("大學英語".equals(ob.toString())){ textField_2.setText("大學英語"); textField_3.setText("87"); }else if("馬列主義".equals(ob.toString())){ textField_2.setText("馬列主義"); textField_3.setText("88"); }else if("毛澤東思想".equals(ob.toString())){ textField_2.setText("毛澤東思想"); textField_3.setText("73"); }else if("計算機圖形學".equals(ob.toString())){ textField_2.setText("計算機圖形學"); textField_3.setText("97"); } } } }); panel_1.add(choice); } } 這樣就能輕松實現登錄驗證了，本打算從數據庫讀取數據的，由于時間關系，這里就簡單的直接驗證了，后續有時間的話再做其他的部分。
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VeVb武林網。
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