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我正在开发一个 GUI 客户端，它将成为一个独立的应用程序，充当 MySQL 数据库后端的前端。我已经为客户端完成了所有的逻辑和编码，但我无法将项目导出到可运行的 .jar 文件。

我有 Eclipse 生成的 manifest.txt，它位于 META-INF 文件夹中。

这是我的主要方法：

package binaparts.main;

import binaparts.gui.*;

public class Main{

public static void main(String[] args){

    MainFrames m = new MainFrames();
    m.displayGUI();
}
}

这是 MainFrames 类：

package binaparts.gui;

import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.ItemListener;
import java.sql.*;

import javax.swing.AbstractButton;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.ComboBoxModel;
import javax.swing.DefaultComboBoxModel;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.LayoutStyle.ComponentPlacement;

import org.json.JSONArray;
import org.json.JSONObject;

import binaparts.dao.*;
import binaparts.properties.ConfigurationManager;

public class MainFrames extends JFrame
{
private MainPanel main;
private CreatePanel create;
private UpdatePanel update;
private FindPanel find;
private SettingsPanel settings;
private ManageUsersPanel Manage;
JFrame frame = new JFrame("Main Menu:");
static final String configFilePath = "META-INF/config.properties";
DBConnect con = new DBConnect();
ConfigurationManager config = null;

public void run(){
  displayGUI();
}

public void displayGUI()
{
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel contentPane = new JPanel();
    contentPane.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));
    contentPane.setLayout(new CardLayout());
    main = new MainPanel(contentPane);
    create = new CreatePanel(contentPane);
    update = new UpdatePanel(contentPane);
    find = new FindPanel(contentPane);
    settings = new SettingsPanel(contentPane);
    Manage = new ManageUsersPanel(contentPane);
    contentPane.add(main, "Main Menu");
    contentPane.add(create, "Create Part");
    contentPane.add(update, "Update Part");
    contentPane.add(find, "Find Part");
    contentPane.add(settings, "Settings");
    contentPane.add(Manage, "Manage Users");
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    int height = screenSize.height;
    int width = screenSize.width;
    frame.setResizable(false);
    frame.setSize(width/2, height/2);
    frame.setLocationRelativeTo(null);
    frame.setSize(700, 580);
    frame.setContentPane(contentPane);
    frame.setVisible(true); 
}
class MainPanel extends JPanel{Contains code for that frame}
class MainPanel extends JPanel{Contains code for that frame}
class CreatePanel extends JPanel{Contains code for that frame}
class UpdatePanel extends JPanel{Contains code for that frame}
class FindPanel extends JPanel{Contains code for that frame}
class SettingsPanel extends JPanel{Contains code for that frame}
class ManageUsersPanel extends JPanel{Contains code for that frame}
}

我没有包含每个面板的代码，以免造成混乱。还有一些其他类用于管理配置属性和数据库连接，它们工作得很好。

我的问题是：我的主要方法/displayGUI 交互或创建 jar 的过程是否有问题？

提前感谢您的帮助！

我运行了 cmd java -jar my.jar 并得到了

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\Danny>cd desktop

C:\Users\Danny\Desktop>cd executable

C:\Users\Danny\Desktop\Executable>java -jar BinaPartsManager.jar
java.io.FileNotFoundException: META-INF\config.properties (The system cannot fin
d the path specified)
        at java.io.FileOutputStream.open(Native Method)
        at java.io.FileOutputStream.<init>(Unknown Source)
        at java.io.FileOutputStream.<init>(Unknown Source)
        at binaparts.properties.ConfigurationManager.save(ConfigurationManager.j
ava:41)
        at binaparts.properties.ConfigurationManager.<init>(ConfigurationManager
.java:21)
        at binaparts.dao.DBConnect.verifyUser(DBConnect.java:87)
        at binaparts.gui.MainFrames$MainPanel.setStatus(MainFrames.java:110)
        at binaparts.gui.MainFrames$MainPanel.<init>(MainFrames.java:137)
        at binaparts.gui.MainFrames.displayGUI(MainFrames.java:66)
        at binaparts.main.RunProgram.main(RunProgram.java:10)
java.lang.NullPointerException
        at binaparts.dao.DBConnect.close(DBConnect.java:21)
        at binaparts.gui.MainFrames$MainPanel.setStatus(MainFrames.java:127)
        at binaparts.gui.MainFrames$MainPanel.<init>(MainFrames.java:137)
        at binaparts.gui.MainFrames.displayGUI(MainFrames.java:66)
        at binaparts.main.RunProgram.main(RunProgram.java:10)
Exception in thread "main" java.lang.NullPointerException
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at binaparts.gui.MainFrames$MainPanel.<init>(MainFrames.java:147)
        at binaparts.gui.MainFrames.displayGUI(MainFrames.java:66)
        at binaparts.main.RunProgram.main(RunProgram.java:10)

我将 config.properties 文件存储在 META-INF 文件夹中。虽然它在 IDE 中运行良好。

4

2 回答 2

2

Again: "you can use Java resources to load the properties file as an (see the tag info for related tutorials), though you can't store values there that are going to change". You haven't said whether they're going to change.

If you are going to store a few things, the (new-ish) way to do that is with the java.util.Preferences API.

If you really need your own file, I suppose the user's' home directory is the place to put a directory of your own in which to store the file, look up user.home as a system parameter.

于 2013-08-20T19:39:06.073 回答
0

另一个提示：使用

java.awt.*; //to import everything from java.awt
javax.swing.*; //to import everything from javax.swing
于 2014-04-23T18:02:03.730 回答