java - 使用带有 JList 和静态数组的 ActionListener

Question

今天，我再次寻求您对我工作中正在进行的项目的帮助/支持。现在我已经创建了一个 GUI，允许用户上传“ach”格式的文件。 (这只是一个具有特定格式的文本文件)。上传后，程序将使用缓冲读取器将文本行分解为四个可能的 JList。每个文本文件中最多有四个“批标题”(以 5 开头的数字)，以及任意数量的“条目详细信息”(以 6 开头的数字)。 ach 文件可能如下所示:

500000000000000000001  
600000000000000000001  
600000000000000000002  
600000000000000000003  
555555555555555555551  
622222222222222222221
622222222222222222223
622222222222222222224

因此，第一个“五”数字和随后的所有“六”将是“批处理一”并显示在第一个 JList 中，第二个“五”数字和随后的所有“六”将显示在第二个 JList。在这种情况下，另外两个 JList 将为空，因为只有两个批处理。

现在这就是我想要实现的目标:

一旦用户上传文件并填充字段(我已成功完成)，用户需要能够单击列表中的“六个”数字之一。一旦他们单击它，JOptionsPane 将询问他们原因代码。这是我的第一个问题，如何实现监听器。因为 JList 字段是使用字符串数组填充的，而该字符串数组稍后在程序中使用缓冲读取器填充，所以我不确定如何完成此操作。

我现在不会讨论第二个问题，因为我的重点是这个。以下是我的代码，任何帮助将不胜感激!

package nacha;

import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.filechooser.FileNameExtensionFilter;

public class NachaVersion3 

{

    final static boolean RIGHT_TO_LEFT = false;
    final static boolean shouldFill = true;
    final static boolean shouldWeightX = true;
    static int entryDetailCountOne;
    static int entryDetailCountTwo;
    static int entryDetailCountThree;
    static int entryDetailCountFour;
    static String batchHeaderDisplayOne="                                                  ";
    static String batchHeaderDisplayTwo="                                                  ";
    static String batchHeaderDisplayThree="                                                  ";
    static String batchHeaderDisplayFour="                                                  ";
    static ArrayList<String> entryDetailListGUI = new ArrayList<String>();
    static ArrayList<String> entryDetailList = new ArrayList<String>(); 
    static ArrayList<String> entryDetailList2 = new ArrayList<String>();
    static ArrayList<String> entryDetailList3 = new ArrayList<String>();
    static ArrayList<String> entryDetailList4 = new ArrayList<String>();

    public static void addComponentsToPane(Container pane){
        if (RIGHT_TO_LEFT){
            pane.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        }

        Border border = BorderFactory.createRaisedBevelBorder();

        JButton submit;

        JLabel labelTitle;
        JLabel labelEntryDetailHeader1;
        JLabel labelEntryDetailHeader2;
        JLabel labelEntryDetailHeader3;
        JLabel labelEntryDetailHeader4;
        final JList listEntryDetail1;
        JList listEntryDetail2;
        JList listEntryDetail3;
        JList listEntryDetail4;


        pane.setLayout(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();
        if (shouldFill){
            c.fill = GridBagConstraints.HORIZONTAL;
        }




        labelTitle = new JLabel("ACH File Converter");
        labelTitle.setBorder(border);
        labelTitle.setFont(new java.awt.Font("Arial", Font.BOLD, 60));
        labelTitle.setHorizontalAlignment(SwingConstants.CENTER);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridwidth=3;
        c.gridx=0;
        c.gridy=0;
        pane.add(labelTitle, c);

        labelEntryDetailHeader1 = new JLabel("Entry Detail Files Under Header: "+batchHeaderDisplayOne.substring(0,50));
        labelEntryDetailHeader1.setBorder(border);
        labelEntryDetailHeader1.setFont(new java.awt.Font("Arial", Font.LAYOUT_LEFT_TO_RIGHT, 14));
        c.fill=GridBagConstraints.HORIZONTAL;
        c.gridwidth=1;
        c.gridx=0;
        c.gridy=1;
        pane.add(labelEntryDetailHeader1, c);

        labelEntryDetailHeader2 = new JLabel("Entry Detail Files Under Header: "+batchHeaderDisplayTwo.substring(0,50));
        labelEntryDetailHeader2.setBorder(border);
        labelEntryDetailHeader2.setFont(new java.awt.Font("Arial", Font.LAYOUT_LEFT_TO_RIGHT, 14));
        c.fill=GridBagConstraints.HORIZONTAL;
        c.gridwidth=1;
        c.gridx=1;
        c.gridy=1;
        pane.add(labelEntryDetailHeader2, c);

        listEntryDetail1 = new JList(entryDetailList.toArray());
        listEntryDetail1.setBorder(border);
        listEntryDetail1.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        listEntryDetail1.setLayoutOrientation(JList.VERTICAL);
        listEntryDetail1.setVisibleRowCount(10);
        listEntryDetail1.setSize(200,200);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridwidth=1;
        c.gridx=0;
        c.gridy=2;
        JScrollPane scrollPane1 = new JScrollPane(listEntryDetail1);
        pane.add(scrollPane1, c);

        listEntryDetail2 = new JList(entryDetailList2.toArray());
        listEntryDetail2.setBorder(border);
        listEntryDetail2.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        listEntryDetail2.setLayoutOrientation(JList.VERTICAL);
        listEntryDetail2.setVisibleRowCount(10);
        listEntryDetail2.setSize(200,200);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridwidth=1;
        c.gridx=1;
        c.gridy=2;
        JScrollPane scrollPane2 = new JScrollPane(listEntryDetail2);
        pane.add(scrollPane2, c);

        labelEntryDetailHeader3 = new JLabel("Entry Detail Files Under Header: "+batchHeaderDisplayThree.substring(0,50));
        labelEntryDetailHeader3.setBorder(border);
        labelEntryDetailHeader3.setFont(new java.awt.Font("Arial", Font.LAYOUT_LEFT_TO_RIGHT, 14));
        c.fill=GridBagConstraints.HORIZONTAL;
        c.gridwidth=1;
        c.gridx=0;
        c.gridy=3;
        pane.add(labelEntryDetailHeader3, c);

        labelEntryDetailHeader4 = new JLabel("Entry Detail Files Under Header: "+batchHeaderDisplayFour.substring(0,50));
        labelEntryDetailHeader4.setBorder(border);
        labelEntryDetailHeader4.setFont(new java.awt.Font("Arial", Font.LAYOUT_LEFT_TO_RIGHT, 14));
        c.fill=GridBagConstraints.HORIZONTAL;
        c.gridwidth=1;
        c.gridx=1;
        c.gridy=3;
        pane.add(labelEntryDetailHeader4, c);

        listEntryDetail3 = new JList(entryDetailList3.toArray());
        listEntryDetail3.setBorder(border);
        listEntryDetail3.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        listEntryDetail3.setLayoutOrientation(JList.VERTICAL);
        listEntryDetail3.setVisibleRowCount(10);
        listEntryDetail3.setSize(200,200);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridwidth=1;
        c.gridx=0;
        c.gridy=4;
        JScrollPane scrollPane3 = new JScrollPane(listEntryDetail3);
        pane.add(scrollPane3, c);

        listEntryDetail4 = new JList(entryDetailList4.toArray());
        listEntryDetail4.setBorder(border);
        listEntryDetail4.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        listEntryDetail4.setLayoutOrientation(JList.VERTICAL);
        listEntryDetail4.setVisibleRowCount(10);
        listEntryDetail4.setSize(200,200);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridwidth=1;
        c.gridx=1;
        c.gridy=4;
        JScrollPane scrollPane4 = new JScrollPane(listEntryDetail4);
        pane.add(scrollPane4, c);



        submit = new JButton("Submit");
        submit.setFont(new java.awt.Font("Arial", Font.BOLD, 40));
        submit.setHorizontalAlignment(SwingConstants.CENTER);
        submit.setVerticalAlignment(SwingConstants.CENTER);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridwidth=2;
        c.gridheight=8;
        c.gridx=0;
        c.gridy=5;
        c.ipady=153;
        pane.add(submit,c);

    }


    private static void createAndShowGUI(){
        JFrame frame = new JFrame("ACH File Converter");
        frame.setSize(500,500);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        addComponentsToPane(frame.getContentPane());

        frame.pack();
        frame.setVisible(true);

    }

    public static void main(String args[]){

        BufferedReader br = null;
        BufferedWriter bw = null;

        int countFive = 0;

        ArrayList<String> batchHeaderList = new ArrayList<String>();

        JFileChooser chooser = new JFileChooser();
        UIManager.put("ScrollPane.background", Color.BLACK);
        FileNameExtensionFilter filter = new FileNameExtensionFilter("ACH Files", "ach");
        chooser.setFileFilter(filter);
        chooser.setDialogTitle("Please choose ACH file to upload");
        int returnVal = chooser.showOpenDialog(chooser);
        if(returnVal == JFileChooser.APPROVE_OPTION)
        {

            try{
                String sCurrentLine;
                br = new BufferedReader(new FileReader(chooser.getSelectedFile()));
                bw = new BufferedWriter(new FileWriter(chooser.getCurrentDirectory()+"//NachaOutput.ACH"));


                while((sCurrentLine = br.readLine()) !=null)
                {

                    if (sCurrentLine.startsWith("5")){
                        batchHeaderList.add(sCurrentLine);
                        countFive++;
                        if (countFive == 1){
                            batchHeaderDisplayOne=sCurrentLine;
                        }else if (countFive ==2 ){
                            batchHeaderDisplayTwo=sCurrentLine;
                        }else if (countFive == 3){
                            batchHeaderDisplayThree=sCurrentLine;
                        }else if (countFive == 4){
                            batchHeaderDisplayFour=sCurrentLine;
                        }
                    }else if (sCurrentLine.startsWith("6") && countFive==1){
                        entryDetailList.add(sCurrentLine);
                    }else if (sCurrentLine.startsWith("6") && countFive==2){
                        entryDetailList2.add(sCurrentLine);
                    }else if (sCurrentLine.startsWith("6") && countFive==3){
                        entryDetailList3.add(sCurrentLine);
                    }


                }

            } catch (IOException e){
                e.printStackTrace();
            } finally {
                try {
                    br.close();
                    bw.close();
                } catch (IOException e){
                    e.printStackTrace();
                }
            }

        javax.swing.SwingUtilities.invokeLater(new Runnable(){
            public void run(){
                createAndShowGUI();
            }
        });

    }

    }
}

如果您想测试此代码以帮助我，您只需将上面的 ACH 示例文本复制并粘贴到文本文件中并将其另存为 .ACH

Answer 1

That is my first problem: how to implemenet the listener.

添加ListSelectionListener给每个JList那需要一个。在处理程序中，您可以根据选择自定义原因代码列表。然后，在模态对话框中请求相关原因代码，如 Getting the User's Input from a Dialog 所示。 .

listEntryDetail.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
    @Override
    public void valueChanged(ListSelectionEvent e) {
        …
        String code = (String)JOptionPane.showInputDialog(…);
        …
    }
});

另请参阅How to Write a List Selection Listener ，以及这些examples .