在使用java进行开发时常常会用到文件和目录的增删复制等方法。我写了一个小工具类。和大家分享，希望大家指正：

package com.wangpeng.utill;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.FileWriter;

import java.io.InputStream;

import java.io.PrintWriter;

/**

 * @author wangpeng

 *

 */

public class ToolOfFile {

	/**

	 * 创建目录

	 *

	 * @param folderPath

	 *            目录目录

	 * @throws Exception

	 */

	public static void newFolder(String folderPath) throws Exception {

		try {

			java.io.File myFolder = new java.io.File(folderPath);

			if (!myFolder.exists()) {

				myFolder.mkdir();

			}

		} catch (Exception e) {

			throw e;

		}

	}

	/**

	 * 创建文件

	 *

	 * @param filePath

	 *            文件路径

	 * @throws Exception

	 */

	public static void newFile(String filePath) throws Exception {

		try {

			File myFile = new File(filePath);

			if (!myFile.exists()) {

				myFile.createNewFile();

			}

		} catch (Exception e) {

			throw e;

		}

	}

	/**

	 * 创建文件，并写入内容

	 *

	 * @param filePath

	 *            文件路径

	 * @param fileContent

	 *            被写入的文件内容

	 * @throws Exception

	 */

	public static void newFile(String filePath, String fileContent)

			throws Exception {

		// 用来写入字符文件的便捷类

		FileWriter fileWriter = null;

		// 向文本输出流打印对象的格式化表示形式,使用指定文件创建不具有自己主动行刷新的新

		PrintWriter printWriter = null;

		try {

			File myFile = new File(filePath);

			if (!myFile.exists()) {

				myFile.createNewFile();

			}

			fileWriter = new FileWriter(myFile);

			printWriter = new PrintWriter(fileWriter);

			printWriter.print(fileContent);

			printWriter.flush();

		} catch (Exception e) {

			throw e;

		} finally {

			if (printWriter != null) {

				printWriter.close();

			}

			if (fileWriter != null) {

				fileWriter.close();

			}

		}

	}

	/**

	 * 复制文件

	 *

	 * @param oldPath

	 *            被拷贝的文件

	 * @param newPath

	 *            复制到的文件

	 * @throws Exception

	 */

	public static void copyFile(String oldPath, String newPath)

			throws Exception {

		InputStream inStream = null;

		FileOutputStream outStream = null;

		try {

			int byteread = 0;

			File oldfile = new File(oldPath);

			// 文件存在时

			if (oldfile.exists()) {

				inStream = new FileInputStream(oldfile);

				outStream = new FileOutputStream(newPath);

				byte[] buffer = new byte[1444];

				while ((byteread = inStream.read(buffer)) != -1) {

					outStream.write(buffer, 0, byteread);

				}

				outStream.flush();

			}

		} catch (Exception e) {

			throw e;

		} finally {

			if (outStream != null) {

				outStream.close();

			}

			if (inStream != null) {

				inStream.close();

			}

		}

	}

	/**

	 * 复制文件

	 * @param inStream 被拷贝的文件的输入流

	 * @param newPath 被复制到的目标

	 * @throws Exception

	 */

	public static void copyFile(InputStream inStream, String newPath)

			throws Exception {

		FileOutputStream outStream = null;

		try {

			int byteread = 0;

			outStream = new FileOutputStream(newPath);

			byte[] buffer = new byte[1444];

			while ((byteread = inStream.read(buffer)) != -1) {

				outStream.write(buffer, 0, byteread);

			}

			outStream.flush();

		} catch (Exception e) {

			throw e;

		} finally {

			if (outStream != null) {

				outStream.close();

			}

			if (inStream != null) {

				inStream.close();

			}

		}

	}

	/**

	 * 复制目录

	 *

	 * @param oldPath

	 *            被复制的目录路径

	 * @param newPath

	 *            被复制到的目录路径

	 * @throws Exception

	 */

	public static void copyFolder(String oldPath, String newPath)

			throws Exception {

		try {

			(new File(newPath)).mkdirs(); // 假设目录不存在 则建立新目录

			File a = new File(oldPath);

			String[] file = a.list();

			File tempIn = null;

			for (int i = 0; i < file.length; i++) {

				if (oldPath.endsWith(File.separator)) {

					tempIn = new File(oldPath + file[i]);

				} else {

					tempIn = new File(oldPath + File.separator + file[i]);

				}

				if (tempIn.isFile()) {

					copyFile(tempIn.getAbsolutePath(),

							newPath + "/" + (tempIn.getName()).toString());

				} else if (tempIn.isDirectory()) {// 假设是子目录

					copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]);

				}

			}

		} catch (Exception e) {

			throw e;

		}

	}

	/**

	 * 删除文件

	 *

	 * @param filePathAndName

	 */

	public static void delFileX(String filePathAndName) {

		File myDelFile = new File(filePathAndName);

		myDelFile.delete();

	}

	/**

	 * 删除目录

	 *

	 * @param path

	 */

	public static void delForder(String path) {

		File delDir = new File(path);

		if (!delDir.exists()) {

			return;

		}

		if (!delDir.isDirectory()) {

			return;

		}

		String[] tempList = delDir.list();

		File temp = null;

		for (int i = 0; i < tempList.length; i++) {

			if (path.endsWith(File.separator)) {

				temp = new File(path + tempList[i]);

			} else {

				temp = new File(path + File.separator + tempList[i]);

			}

			if (temp.isFile()) {

				temp.delete();

			} else if (temp.isDirectory()) {

				// 删除完里面全部内容

				delForder(path + "/" + tempList[i]);

			}

		}

		delDir.delete();

	}

	public static void main(String[] args) {

		String oldPath = "F:/test/aaa/";

		String newPath = "F:/test/bbb/";

		try {

			// ToolOfFile.newFolder("F:/test/hello/");

			// ToolOfFile.newFile("F:/test/hello/world.txt","我爱你，the world！

");

			ToolOfFile.copyFolder(oldPath, newPath);

			// ToolOfFile.delForder("F:/test/hello");

		} catch (Exception e) {

			e.printStackTrace();

		}

		System.out.println("OK");

	}

}