Question

解决了！ crew4ok也帮助了其他人，谢谢！以下代码部分出错。我正在尝试将png图像加载到BufferedImage类型但不能这样做，我在ubuntu工作。我有一个名为TicTacToe的根目录，在它下面我有src和res文件夹。在src我有我的java文件和res我有一个png图像。当我尝试从res文件夹访问png文件时，它会出错。我的目录结构的链接：http://tinypic.com/view.php?pic=210aamd&s=5#.Up38mLUW3h8

package com.blogspot.edwn112;

import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel; 
import javax.swing.UIManager;

public class Game extends JFrame implements MouseListener {
private JPanel panel = new JPanel();
private JPanel gameArea = new JPanel();
private JButton button = new JButton("Play Again");
private JLabel label;
private BufferedImage resizedImage;

public Game() {
    addMouseListener(this);
    panel.add(button);
    BufferedImage image = null;

    try {
        image = ImageIO.read(new File("/TicTacToe/res/tictactoe.png"));
    } catch (IOException e) {
        e.printStackTrace();
    }

    resizedImage = resize(image, 100, 100);

    gameArea.add(label);
    add(gameArea, BorderLayout.CENTER);
    add(panel, BorderLayout.SOUTH);
}

public void mousePressed(MouseEvent e) {
}

public void mouseReleased(MouseEvent e) {
}

public void mouseClicked(MouseEvent e) {
}

public void mouseExited(MouseEvent e) {
}

public void mouseEntered(MouseEvent e) {
}

public static BufferedImage resize(BufferedImage image, int width,
        int height) {
    BufferedImage bi = new BufferedImage(width, height,
            BufferedImage.TRANSLUCENT);
    Graphics2D g2d = (Graphics2D) bi.createGraphics();
    g2d.addRenderingHints(new RenderingHints(RenderingHints.KEY_RENDERING,
            RenderingHints.VALUE_RENDER_QUALITY));
    g2d.drawImage(image, 0, 0, width, height, null);
    g2d.dispose();
    return bi;
}

public void paint(Graphics g) {
    g.drawImage(resizedImage, 0, 0, getWidth(), getHeight(), null);
}

public static void main(String[] args) {
    try {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (Exception e) {
        System.out.println("Error in native look");
    }
    JFrame frame = new Game();
    frame.setTitle("Tic Tac Toe");
    frame.setSize(400, 300);
    // frame.pack();
    frame.setResizable(false);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
    }

}

错误：存档所需的库：项目'TesTacToe'中的'res / tictactoe.png'无法读取或不是有效的ZIP文件
javax.imageio.IIOException：无法读取输入文件！在javax.imageio.ImageIO.read（ImageIO.java:1301）

Answer 1

如果项目根文件夹是TicTacToe，您只想使用 "res/tictactoe.png" 作为文件路径。

TicTacToe (project root dir)
        res
           tictacttoe.png
        src

当你使用这个"TicTacToe/res/tictactoe.png"你说文件结构是这样的

ProjectRoot
          TicTacToe
                  res
                     tictactoe.png

Answer 2

您是否尝试过新文件（getClass（）。getResource（“// to tictactoe”）;？

Answer 3

你的应用有足够的权限来读取文件吗？我在ImageIO.read（）源代码中找到了这些行：

if (!input.canRead()) {
    throw new IIOException("Can't read input file!");
}

而input.can Read（）反过来给了我们：

public boolean canRead() {
    SecurityManager security = System.getSecurityManager();
    if (security != null) {
        security.checkRead(path);
    }
    return fs.checkAccess(this, FileSystem.ACCESS_READ);
}

读取图像时出现IIOException

3 个答案: