将@2x.png这样的文件重命名并复制到drawable-xxhdpi里

RenameAndCopyDemo.java

import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class RenameAndCopyDemo {
	private JFrame mainFrame;
	JTextField inputEdit;
	private JPanel northPanel;
	private JPanel centerPanel;

	public RenameAndCopyDemo() {
		prepareGUI();
	}

	public static void main(String[] args) {
		new RenameAndCopyDemo();
	}

	private void prepareGUI() {
		mainFrame = new JFrame("重命名小工具");
		mainFrame.setSize(600,300);
		mainFrame.setLayout(new GridLayout(3, 2));
		mainFrame.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent windowEvent) {
				System.exit(0);
			}
		});

		northPanel = initNorthPanel();
		centerPanel = initCenterPanel();

		mainFrame.add(northPanel);
		mainFrame.add(centerPanel);
		mainFrame.setVisible(true);

		Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
		mainFrame.setLocation(dim.width / 2 - mainFrame.getSize().width / 2,
				dim.height / 2 - mainFrame.getSize().height / 2);

	}

	private JPanel initNorthPanel() {
		JPanel panel = new JPanel();
		panel.setBorder(BorderFactory.createEmptyBorder(1, 10, 10, 10));

		JLabel headerLabel = new JLabel("输入@2x.png所在的文件夹的全路径：");
		headerLabel.setBorder(BorderFactory.createEmptyBorder(10, 0, 10, 0));
		
		inputEdit = new JTextField("");
		
		GridBagLayout layout = new GridBagLayout();
		panel.setLayout(layout);
		panel.add(headerLabel);
		panel.add(inputEdit);

		GridBagConstraints s = new GridBagConstraints();
		s.fill = GridBagConstraints.BOTH;
		s.gridwidth=0;
        s.weightx = 0;
        s.weighty=0;
        layout.setConstraints(headerLabel, s);
        s.gridwidth=1;
        s.gridheight=0;
        s.weightx = 0;
        s.weighty=0;
        layout.setConstraints(inputEdit, s);
        
		return panel;
	}

	private JPanel initCenterPanel() {
		JPanel panel = new JPanel();

		JButton okButton = new JButton("开始复制");
		okButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				 tryBeginFindAndCopy(inputEdit.getText());
			}
		});
		panel.add(okButton);
		return panel;
	}
	private void tryBeginFindAndCopy(String text){
		File file=new File(text);
		if (file.exists()&& file.isDirectory()) {
			int count=beginFindAndCopy(text);
			JOptionPane.showMessageDialog(mainFrame,
				    "执行成功。复制了共"+count+"个文件。");
		}else{
			JOptionPane.showMessageDialog(mainFrame,
				    "错误，文件夹不存在",
				    "Error",
				    JOptionPane.ERROR_MESSAGE);
		}
	}
	/**
	 * 
	 * @param srcPath
	 *            输入的文件夹
	 * @return 复制的文件数量
	 */
	protected int beginFindAndCopy(String srcPath) {
		File rootFolder = new File(srcPath);
		int i = 0;
		for (File file : rootFolder.listFiles()) {
			if (file.isFile()) {
				String name = file.getName();
				System.out.println(name);

				String fileName = null;

				String multiplay = "";
				if (name.contains("@")) {
					multiplay = name.substring(name.lastIndexOf("@") + 1,
							name.lastIndexOf("."));
					String extention = name.substring(name.lastIndexOf("."));
					fileName = name.substring(0, name.lastIndexOf("@"))
							+ extention;
				} else {
					multiplay = "1x";
					fileName = name;
				}
				multiplay = multiplay.toLowerCase();
				String folderName = getXXhdpiFolderNameByNX(multiplay);

				if (folderName != null) {
					File folder = new File(file.getParentFile(), folderName);
					if (!(folder.isDirectory() && folder.exists())) {
						folder.mkdirs();
					}

					File targetFile = new File(folder, fileName);
					copyFileFromTo(file, targetFile);
					i++;
				}
			}

		}
		return i;
	}

	private static void copyFileFromTo(File srcFile, File targetFile) {

		System.out.println(targetFile.getAbsolutePath());
		try {
			Files.copy(srcFile.toPath(), targetFile.toPath());
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	private static String getXXhdpiFolderNameByNX(String multiplay) {
		switch (multiplay) {
		case "1x":
			return "drawable-mdpi";
		case "1.5x":
			return "drawable-hdpi";
		case "2x":
			return "drawable-xhdpi";
		case "3x":
			return "drawable-xxhdpi";
		case "4x":
			return "drawable-xxxhdpi";
		}
		return null;
	}
}