• 【JAVA】-- 简易超市管理系统（二）（实现思路+每步代码）

    前面已经完成了界面标题和四个按钮，

    现在开始完成“增加内容”按钮的具体功能。

    一、创建增加内容类

    创建一个增类，实现增类的功能；

    然后创建面板组件，把类添加到面板组件中，

    因为使用网格包布局，所以创建一个实例，把面板组件添加到网格中。

    创建Zeng类

    创建一个标签方法获得标题，

    在构造方法中设置组件大小和布局方式，

    创建可推拉面板，增加一个做面板组件和一个右面板组件，

    左面板组件设置为网格包布局，右面板组件设置为流式布局。

    1. import javax.swing.*;
    2. import java.awt.*;
    3.  
    4. public class Zeng extends JPanel {
    5.  
    6.     public Zeng(){
    7.         super();
    8.         this.setSize(352,302);
    9.         this.setOpaque(false);
    10.         this.setLayout(new BorderLayout());
    11.  
    12.         JSplitPane hSplitPane=new JSplitPane();//创建可推拉面板
    13.         hSplitPane.setOpaque(false);//面板透明，可以看到背景图片
    14.         JPanel leftPanel=new JPanel();//推拉面板的左侧面板
    15.         JPanel rightPanel=new JPanel();//推拉面板的右侧面板
    16.         leftPanel.setOpaque(false);//面板透明，可以看见背景图片
    17.         rightPanel.setOpaque(false);
    18.         hSplitPane.setLeftComponent(leftPanel);//推拉面板添加组件
    19.         hSplitPane.setRightComponent(rightPanel);
    20.         hSplitPane.setOneTouchExpandable(true);//添加一键单击按钮
    21.         hSplitPane.setDividerLocation(350);//分隔线距离面板左侧位置
    22.         this.add(hSplitPane, BorderLayout.CENTER);
    23.         leftPanel.setLayout(new GridBagLayout());
    24.         rightPanel.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 50));//右侧面板设置流式布局管理器
    25.  
    26.     }
    27. }

    主类MainFrame增加/修改

    1. private JPanel mainPanel = null;// 面板组件实例化
    2. private Zeng zengPanel = null;// “增”实例化

    创建一个zeng类方法实例化界面的功能

    1.  private Zeng getZeng(){//实例化界面的功能
    2.         if(zengPanel == null){
    3.             zengPanel = new Zeng();//实例化对象
    4.             zengPanel.setName("zengPanel");//赋予一个唯一标识
    5.         }
    6.         return zengPanel;
    7.     }

    创建一个面板组件，把功能集中到该面板区域

    布局为卡片布局，实现可切换的效果

    1. private JPanel getMainPanel(){//把功能集中到该面板区域
    2.         if(mainPanel == null){
    3.             mainPanel = new JPanel();
    4.             mainPanel.setOpaque(false);
    5.             mainPanel.setLayout(new CardLayout());//卡片布局管理器，可切换
    6.             mainPanel.setBorder(BorderFactory.createTitledBorder(//设置显示界面的边界效果
    7.                     BorderFactory.createEmptyBorder(0, 0, 0, 0),
    8.                     "功能面板",
    9.                     TitledBorder.DEFAULT_JUSTIFICATION,TitledBorder.ABOVE_TOP,
    10.                     new Font("sansserif", Font.BOLD, 12),
    11.                     new Color(59, 59, 59)));
    12.             mainPanel.add(getZeng(),getZeng().getName());
    13.         }
    14.         return mainPanel;
    15.     }

    在getBGPanel方法增加，实例化一个网格包3对象，把集中功能面板添加进去。

    1. GridBagConstraints gridBagConstraints3 = new GridBagConstraints();
    2.             gridBagConstraints3.gridx = 0;
    3.             gridBagConstraints3.gridy = 2;
    4.             gridBagConstraints3.gridwidth = 4;
    5.             gridBagConstraints3.gridheight = 6;
    6.             gridBagConstraints3.insets = new Insets(5,15,10,15);
    7.             gridBagConstraints3.fill = GridBagConstraints.BOTH;
    8.             bgPanel.add(getMainPanel(),gridBagConstraints3);

    二、在“增加内容”中添加标题

    功能面板组件里还是采用的网格包布局管理器，做个获得标题的标签方法，将此方法添加到网格中。

    Zeng类增加

    1.     public JLabel title;
    2.  
    3.     public JLabel getTitle(){
    4.         if(title == null){
    5.             title = new JLabel("进货记录");
    6.             title.setFont(new Font("华文行楷",Font.BOLD,20));
    7.             title.setHorizontalAlignment(SwingConstants.CENTER);//设置组件水平对齐方式
    8.             title.setHorizontalTextPosition(SwingConstants.CENTER);//设置文字垂直对齐方式
    9.             title.setVerticalAlignment(SwingConstants.CENTER);//设置组件垂直对齐方式
    10.             title.setVerticalTextPosition(SwingConstants.CENTER);//设置文字垂直对齐方式
    11.         }
    12.         return title;
    13.     }

    构造方法中增加

    1.         GridBagConstraints gridBagConstraints17= new GridBagConstraints();
    2.         gridBagConstraints17.gridx=0;
    3.         gridBagConstraints17.gridy=0;
    4.         gridBagConstraints17.gridwidth=2;
    5.         gridBagConstraints17.weightx=1.0;
    6.         gridBagConstraints17.fill=GridBagConstraints.BOTH;
    7.         gridBagConstraints17.insets=new Insets(5, 25, 25, 25);
    8.  
    9.         JLabel label9 = getTitle();
    10.         leftPanel.add(label9,gridBagConstraints17);

    三、在“增加内容”中添加输入功能

    一个标签后有一个输入框，每个实现方法相同，看着代码很多，其实是一个方法复制了8次，只需要看其中一个的实现方法即可。

    先定义好实例化对象，

    然后给予每个对象一个方法，在方法体中实现对象的引用，

    最后将每个组件添加到网格中，一个组件一个网格，标签和输入框都是组件。

    Zeng类增加

    1.  public JLabel commodityName;//进货名称
    2.     public JFormattedTextField field1;//输入框
    3.     public JLabel commodityMaker;//进货厂家
    4.     public JFormattedTextField field2;//输入框
    5.     public JLabel commodityPrice;//进货价格
    6.     public JFormattedTextField field3;//输入框
    7.     public JLabel commodityMember;//进货数量
    8.     public JFormattedTextField field4;//输入框
    9.     public JLabel commodityExpense;//进货开销
    10.     public JFormattedTextField field5;//输入框
    11.     public JLabel surplusMoney;//货款余额
    12.     public JFormattedTextField field6;//输入框
    13.     public JLabel operatorName;//操作人
    14.     public JFormattedTextField field7;//输入框
    15.     public JLabel operatorDate;//进货日期
    16.     public JFormattedTextField field8;//输入框
    1.  public JLabel getCommodityName(){
    2.         if(commodityName == null){
    3.             commodityName = new JLabel("进货名称");
    4.         }
    5.         return commodityName;
    6.     }
    7.     public JFormattedTextField getField1(){
    8.         if(field1 == null){
    9.             field1 = new JFormattedTextField();
    10.         }
    11.         return field1;
    12.     }
    13.     public JLabel getCommodityMaker(){
    14.         if(commodityMaker == null){
    15.             commodityMaker = new JLabel("进货厂家");
    16.         }
    17.         return commodityMaker;
    18.     }
    19.     public JFormattedTextField getField2(){
    20.         if(field2 == null){
    21.             field2 = new JFormattedTextField();
    22.         }
    23.         return field2;
    24.     }
    25.     public JLabel getCommodityPrice(){
    26.         if(commodityPrice == null){
    27.             commodityPrice = new JLabel("进货价格");
    28.         }
    29.         return commodityPrice;
    30.     }
    31.     public JFormattedTextField getField3(){
    32.         if(field3 == null){
    33.             field3 = new JFormattedTextField();
    34.         }
    35.         return field3;
    36.     }
    37.     public JLabel getCommodityMember(){
    38.         if(commodityMember==null){
    39.             commodityMember=new JLabel("进货数量");
    40.         }
    41.         return commodityMember;//返回数量标签
    42.     }
    43.     public JFormattedTextField getField4(){
    44.         if(field4==null){
    45.             field4=new JFormattedTextField();
    46.         }
    47.         return field4;//返回数量输入框
    48.     }
    49.     public JLabel getCommodityExpense(){
    50.         if(commodityExpense==null){
    51.             commodityExpense=new JLabel("进货开销");
    52.         }
    53.         return commodityExpense;//返回开销标签
    54.     }
    55.     public JFormattedTextField getField5(){
    56.         if(field5==null){
    57.             field5=new JFormattedTextField();
    58.         }
    59.         return field5;//返回开销输入框
    60.     }
    61.     public JLabel getSurplusMoney(){
    62.         if(surplusMoney==null){
    63.             surplusMoney=new JLabel("货款余额");
    64.         }
    65.         return surplusMoney;//返回余额标签
    66.     }
    67.     public JFormattedTextField getField6(){
    68.         if(field6==null){
    69.             field6=new JFormattedTextField();
    70.         }
    71.         return field6;//返回余额输入框
    72.     }
    73.     public JLabel getOperatorName(){
    74.         if(operatorName==null){
    75.             operatorName=new JLabel("经办人");
    76.         }
    77.         return operatorName;//返回经办人标签
    78.     }
    79.     public JFormattedTextField getField7(){
    80.         if(field7==null){
    81.             field7=new JFormattedTextField();
    82.         }
    83.         return field7;//返回经办人输入框
    84.     }
    85.     public JLabel getOperatorDate(){
    86.         if(operatorDate==null){
    87.             operatorDate=new JLabel("进货日期");
    88.         }
    89.         return operatorDate;//返回日期标签
    90.     }
    91.     public JFormattedTextField getField8(){
    92.         if(field8==null){
    93.             field8=new JFormattedTextField();
    94.         }
    95.         return field8;//返回日期输入框
    96.     }

    构造方法增加

    每一组有两个网格包对象，一个用于标签，一个用于输入框，

    设置好他们的位置即可。

    1.  GridBagConstraints gridBagConstraints1 = new GridBagConstraints();
    2.         gridBagConstraints1.gridx = 0;
    3.         gridBagConstraints1.gridy = 1;
    4.         gridBagConstraints1.insets = new Insets(0,5,0,0);
    5.         JLabel label1 = getCommodityName();
    6.         leftPanel.add(label1,gridBagConstraints1);
    7.         GridBagConstraints gridBagConstraints2 = new GridBagConstraints();
    8.         gridBagConstraints2.gridx = 1;
    9.         gridBagConstraints2.gridy = 1;
    10.         gridBagConstraints2.insets = new Insets(0,0,0,5);
    11.         gridBagConstraints2.weightx = 1.0;
    12.         gridBagConstraints2.fill = GridBagConstraints.HORIZONTAL;
    13.         JTextField fieldName = getField1();
    14.         leftPanel.add(fieldName,gridBagConstraints2);
    15.  
    16.         GridBagConstraints gridBagConstraints3 = new GridBagConstraints();
    17.         gridBagConstraints3.gridx = 0;
    18.         gridBagConstraints3.gridy = 2;
    19.         gridBagConstraints3.insets = new Insets(0,5,0,0);
    20.         JLabel label2 = getCommodityMaker();
    21.         leftPanel.add(label2,gridBagConstraints3);
    22.         GridBagConstraints gridBagConstraints4 = new GridBagConstraints();
    23.         gridBagConstraints4.gridx = 1;
    24.         gridBagConstraints4.gridy = 2;
    25.         gridBagConstraints4.insets = new Insets(0,0,0,5);
    26.         gridBagConstraints4.weightx = 1.0;
    27.         gridBagConstraints4.fill = GridBagConstraints.HORIZONTAL;
    28.         JTextField fieldMaker = getField2();
    29.         leftPanel.add(fieldMaker,gridBagConstraints4);
    30.  
    31.         GridBagConstraints gridBagConstraints5 = new GridBagConstraints();
    32.         gridBagConstraints5.gridx = 0;
    33.         gridBagConstraints5.gridy = 3;
    34.         gridBagConstraints5.insets = new Insets(0,5,0,0);
    35.         JLabel label3 = getCommodityPrice();
    36.         leftPanel.add(label3,gridBagConstraints5);
    37.         GridBagConstraints gridBagConstraints6 = new GridBagConstraints();
    38.         gridBagConstraints6.gridx = 1;
    39.         gridBagConstraints6.gridy = 3;
    40.         gridBagConstraints6.insets = new Insets(0,0,0,5);
    41.         gridBagConstraints6.fill = GridBagConstraints.HORIZONTAL;
    42.         JTextField fieldPrice = getField3();
    43.         leftPanel.add(fieldPrice,gridBagConstraints6);
    44.  
    45.         GridBagConstraints gridBagConstraints7 = new GridBagConstraints();
    46.         gridBagConstraints7.gridx = 0;
    47.         gridBagConstraints7.gridy = 4;
    48.         gridBagConstraints7.insets = new Insets(0,5,0,0);
    49.         JLabel label4 = getCommodityMember();
    50.         leftPanel.add(label4,gridBagConstraints7);
    51.         GridBagConstraints gridBagConstraints8 = new GridBagConstraints();
    52.         gridBagConstraints8.gridx = 1;
    53.         gridBagConstraints8.gridy = 4;
    54.         gridBagConstraints8.insets = new Insets(0,0,0,5);
    55.         gridBagConstraints8.fill = GridBagConstraints.HORIZONTAL;
    56.         JTextField fieldMember = getField4();
    57.         leftPanel.add(fieldMember,gridBagConstraints8);
    58.  
    59.         GridBagConstraints gridBagConstraints9= new GridBagConstraints();
    60.         gridBagConstraints9.gridx=0;
    61.         gridBagConstraints9.gridy=5;
    62.         gridBagConstraints9.insets=new Insets(0, 5, 0, 0);
    63.         JLabel label5=getCommodityExpense();//调用开销标签
    64.         leftPanel.add(label5, gridBagConstraints9);//添加标签
    65.         GridBagConstraints gridBagConstraints10= new GridBagConstraints();
    66.         gridBagConstraints10.gridx=1;
    67.         gridBagConstraints10.gridy=5;
    68.         gridBagConstraints10.insets=new Insets(0, 0, 0, 5);
    69.         gridBagConstraints10.weightx=1.0;
    70.         gridBagConstraints10.fill=GridBagConstraints.HORIZONTAL;
    71.         JTextField fieldExpense=getField5();//调用开销输入框
    72.         leftPanel.add(fieldExpense, gridBagConstraints10);
    73.  
    74.         GridBagConstraints gridBagConstraints11= new GridBagConstraints();
    75.         gridBagConstraints11.gridx=0;
    76.         gridBagConstraints11.gridy=6;
    77.         gridBagConstraints11.insets=new Insets(0, 5, 0, 0);
    78.         JLabel label6=getSurplusMoney();//调用余额标签
    79.         leftPanel.add(label6, gridBagConstraints11);//添加标签
    80.         GridBagConstraints gridBagConstraints12= new GridBagConstraints();
    81.         gridBagConstraints12.gridx=1;
    82.         gridBagConstraints12.gridy=6;
    83.         gridBagConstraints12.insets=new Insets(0, 0, 0, 5);
    84.         gridBagConstraints12.weightx=1.0;
    85.         gridBagConstraints12.fill=GridBagConstraints.HORIZONTAL;
    86.         JTextField fieldMoney=getField6();//调用余额输入框
    87.         leftPanel.add(fieldMoney, gridBagConstraints12);
    88.  
    89.         GridBagConstraints gridBagConstraints13= new GridBagConstraints();
    90.         gridBagConstraints13.gridx=0;
    91.         gridBagConstraints13.gridy=7;
    92.         gridBagConstraints13.insets=new Insets(0, 5, 0, 0);
    93.         JLabel label7=getOperatorName();//调用经办人标签
    94.         leftPanel.add(label7, gridBagConstraints13);
    95.         GridBagConstraints gridBagConstraints14= new GridBagConstraints();
    96.         gridBagConstraints14.gridx=1;
    97.         gridBagConstraints14.gridy=7;
    98.         gridBagConstraints14.insets=new Insets(0, 0, 0, 5);
    99.         gridBagConstraints14.weightx=1.0;
    100.         gridBagConstraints14.fill=GridBagConstraints.HORIZONTAL;
    101.         JTextField fieldOperator=getField7();//调用经办人输入框
    102.         leftPanel.add(fieldOperator, gridBagConstraints14);
    103.  
    104.         GridBagConstraints gridBagConstraints15= new GridBagConstraints();
    105.         gridBagConstraints15.gridx=0;
    106.         gridBagConstraints15.gridy=8;
    107.         gridBagConstraints15.insets=new Insets(0, 5, 5, 0);
    108.         JLabel label8=getOperatorDate();//调用经办日期标签
    109.         leftPanel.add(label8, gridBagConstraints15);
    110.         GridBagConstraints gridBagConstraints16= new GridBagConstraints();
    111.         gridBagConstraints16.gridx=1;
    112.         gridBagConstraints16.gridy=8;
    113.         gridBagConstraints16.insets=new Insets(0, 0, 5, 5);
    114.         gridBagConstraints16.weightx=1.0;
    115.         gridBagConstraints16.fill=GridBagConstraints.HORIZONTAL;
    116.         JTextField fieldDate=getField8();//调用经办日期输入框
    117.         leftPanel.add(fieldDate, gridBagConstraints16);

     四、在“增加内容”中增加“进货”“清空”按钮

    创建按钮，设置好按钮的样式，直接添加到右侧面板中，布局方式默认为流式布局。

    Zeng类增加

    构造方法增加

    1.  JButton button1 = new JButton("进货");//设置右侧面板点击按钮
    2.         button1.setFont(new Font("华文行楷",Font.BOLD,20));
    3.         button1.setOpaque(false);
    4.         button1.setBorderPainted(false);//按钮去除边界效果
    5.         button1.setContentAreaFilled(false);//去除填充效果
    6.         button1.setFocusPainted(false);//去除焦点效果
    7.         rightPanel.add(button1);
    8.  
    9.         JButton button2 = new JButton("清空");//设置右侧面板清空按钮
    10.         button2.setFont(new Font("华文行楷", Font.BOLD, 20));
    11.         button2.setOpaque(false);
    12.         button2.setBorderPainted(false);
    13.         button2.setContentAreaFilled(false);
    14.         button2.setFocusPainted(false);
    15.         rightPanel.add(button2);

     

    简易超市管理系统的基本页面已经雏形，下一文章增加“写入文件”和“进货”“清空”的功能。

  • 相关阅读:
    【Qt炫酷动画】2.QAbstractAnimation抽象动画类
    多维时序 | MATLAB实现TCN-selfAttention自注意力机制结合时间卷积神经网络多变量时间序列预测
    laravel引入element-ui后,blade模板中使用elementui时,事件未生效问题(下载element-ui到本地直接引入项目)
    【C++】多态（重写）的实现过程及其原理【核心知识点精讲】（22）
    牛客[NOIP2016]蚯蚓
    MySQLBackup备份数据库
    python函数运行加速
    css_23_多列布局
    CTF Misc(3)流量分析基础以及原理
    redis深度历险 1 - Redis基础数据结构-001
  • 原文地址：https://blog.csdn.net/Tir_zhang/article/details/125410685