如何在eclipse中将资源文件夹添加到我的Java项目中 [英] How do I add a resources folder to my Java project in eclipse

问题描述

我想有一个地方来存储我的图像文件，用于我的java项目（一个真正简单的类，只是将图像加载到面板上）。我看到无处不在，找不到如何做到这一点。我该如何做？我已经尝试向项目添加一个新文件夹，向项目添加一个新的类文件夹，并向项目添加一个新的源文件夹。无论我做什么，我总是得到一个IOException。文件夹总是说它们在构建路径上，所以我不知道该怎么做。

  import java.awt。颜色; 
 import java.awt.Dimension; 
 import java.awt.Graphics; 
 import java.awt.image.BufferedImage; 
 import java.io.File; 
 import java.io.IOException; 
 import javax.imageio.ImageIO; 
 import javax.swing.JFrame; 
 import javax.swing.JPanel; 
 
 public class PracticeFrame extends JFrame {
 
 private static BufferedImage image; 
线程; 
 
 public PracticeFrame（）{
 super（）; 
 setPreferredSize（new Dimension（640,480））; 
 setResizable（false）; 
 setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）; 
 pack（）; 
 setVisible（true）; 
} 
 
 public static void main（String [] args）{
 PracticeFrame pframe = new PracticeFrame（）; 
 try {
 image = ImageIO.read（new File（/ islands.png））; 
} catch（IOException e）{
 e.printStackTrace（）; 
} 
 
 JPanel panel = new JPanel（）{
 @Override 
 protected void paintComponent（Graphics g）{
 super.paintComponent（g）; 
 g.drawImage（image，0,0，null）; 
} 
}; 
 
 panel.setBackground（Color.BLUE）; 
 panel.repaint（）; 
 pframe.add（panel）; 
 
 
} 
 
 
} 
  

编辑：对我有用的东西，我不知道为什么要添加主/ res /文件夹作为类文件夹，然后删除它。我运行它，而/ main / res /作为构建路径的一部分作为一个类文件夹，它仍然没有工作。当我添加它，我有一个弹出窗口告诉我一些关于排除的过滤器。但是当我从构建路径中的库中删除文件夹，并将文件路径更改为：

  image = ImageIO.read （new File（src / main / res / islands.png））; 
  

我至少停止得到抛出的IOException。我不能正确地将图像添加到面板，因为它没有显示，但至少它找到了文件（我想）。

解决方案

对于添加资源文件夹，
构建路径 - >配置构建路径 - >源（选项卡） - >添加文件夹 - >创建新文件夹

在新文件夹中添加my-resource.txt文件。
然后在你的代码中：

  InputStream res = 
 Main.class.getResourceAsStream（/ my- resource.txt）; 
 
 BufferedReader reader = 
 new BufferedReader（new InputStreamReader（res））; 
 String line = null; 
 while（（line = reader.readLine（））！= null）{
 System.out.println（line）; 
} 
 reader.close（）; 
  

I want to have a place to store my image files to use in my java project (a really simple class that just loads an image onto a panel). I have looked everywhere and cannot find how to do this. How do I do this? I have tried adding a new folder to the project, adding a new class folder to the project, and adding a new source folder to the project. No matter what I do, I always get a IOException. The folders always say they are on the build path, so I'm not sure what to do.

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class PracticeFrame extends JFrame{

private static BufferedImage image;
Thread thread;

public PracticeFrame() {
    super();
    setPreferredSize(new Dimension(640,480));
    setResizable(false);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    pack();
    setVisible(true);
}

public static void main (String[] args) {
    PracticeFrame pframe = new PracticeFrame();
    try {
        image = ImageIO.read(new File("/islands.png"));
    } catch (IOException e) {
        e.printStackTrace();
    }

    JPanel panel = new JPanel() {
        @Override
        protected void  paintComponent(Graphics g) {
            super.paintComponent(g);
            g.drawImage(image,0,0,null);
        }
    };

    panel.setBackground(Color.BLUE);
    panel.repaint();
    pframe.add(panel);


}


}

EDIT: Something that worked for me, and I have no idea why, was adding the main/res/ folder as a class folder and then removing it. I ran it while the /main/res/ was part of the build path as a class folder and it still didn't work. When i added it, i got a popup that told me something about excluded filters. But when i removed the folder from the libraries in the build path, and changed my file path to:

image = ImageIO.read(new File("src/main/res/islands.png"));

I at least stopped getting the IOException thrown. I must not be adding the image to the panel correctly, because it's not showing up, but at least it found the file (i think).

解决方案

For add resoure folder, Build Path -> Configure Build Path -> Source (Tab) -> Add Folder -> Create new Folder

add "my-resource.txt" file inside the new folder. Then in your code:

    InputStream res =
    Main.class.getResourceAsStream("/my-resource.txt");

    BufferedReader reader =
        new BufferedReader(new InputStreamReader(res));
    String line = null;
    while ((line = reader.readLine()) != null) {
        System.out.println(line);
    }
    reader.close();

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