[置顶] 使用java来把一个目录下的所有文件拷贝到另外一个目录下，并且重命名

import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;


public class HandleFilename {

	public static String destDir = "D:\\MyCopyFile";
	
	public static void main(String[] args) throws Exception{
		
		createDestDir(destDir);
		
		String pathname = "D:\\WDJDownload\\Apps\\Hair Salon\\assets";
		File file = new File(pathname);
		handleFile(file);
		
		
	}
	
	/**
	 * 创建一个新的目录
	 * @param dirName
	 */
	public static void createDestDir(String dirName){
		File file = new File( dirName);
		if(!file.exists()){
			file.mkdir();
		}
	}
	
	/**
	 * 遍历每一个文件...
	 * @param file
	 * @throws Exception
	 */
	public static void handleFile(File file) throws Exception{
		File[] files = file.listFiles();
		System.out.println("------------> files.length: " + files.length);
		for(File f : files){
			if(f.isDirectory()){
				handleFile(f);
			}else{
				/**
				 * file.canWrite():判断文件是否可写....
				 */
//				System.out.println("--------> file.canWrite()" + file.canWrite());
//				System.out.println("--------> file.canRead()" + file.canRead());
//				System.out.println("--------> file.canExecute()" + file.canExecute());
				System.out.println( "-------------->" + f.getName());
			    copyFile(f);
			}
		}
	}
	
	/**
	 * 复制一个文件
	 * @param file
	 * @throws Exception
	 */
	public static void copyFile(File file) throws Exception{
		
		String oldFileName = file.getName();
		if(oldFileName.endsWith("_jpg")){//修改后缀名...
			oldFileName = oldFileName.replace("_jpg", ".jpg");
		}else if(oldFileName.endsWith("_png")){
			oldFileName = oldFileName.replace("_png", ".png");
		}
		
		String newFileName = oldFileName;
		/**
		 * file.getAbsolutePath(): 返回带文件名的绝对路径...
		 */
		System.out.println("----------->file.getAbsolutePath(): " + file.getAbsolutePath());
		System.out.println("----------->file.getName(): " + file.getName());
		
		FileReader reader = new FileReader(file.getAbsolutePath() );
		FileWriter writer = new FileWriter(destDir + "\\" + newFileName);
		
		int ch;
		while((ch = reader.read()) != -1){
			writer.write(ch);
		}
		
		reader.close();
		writer.close();
	}
}