文件操作

package com.test;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.util.StringTokenizer;

public class FileUtil {

	/**
	 * 读取文本文件内容
	 * 
	 * @param filePathAndName
	 *            带有完整绝对路径的文件名
	 * @param encoding
	 *            文本文件打开的编码方式
	 * @return 返回文本文件的内容
	 */
	public static String readTxt(String filePathAndName, String encoding)
			throws IOException {
		encoding = encoding.trim();
		StringBuffer str = new StringBuffer("");
		String st = "";
		try {
			FileInputStream fs = new FileInputStream(filePathAndName);
			InputStreamReader isr;
			if (encoding.equals("")) {
				isr = new InputStreamReader(fs);
			} else {
				isr = new InputStreamReader(fs, encoding);
			}
			BufferedReader br = new BufferedReader(isr);
			try {
				String data = "";
				while ((data = br.readLine()) != null) {
					str.append(data + "\r\n");
				}
			} catch (IOException e) {
				str.append(e.toString());
			}
			st = str.toString();
		} catch (IOException es) {
			throw es;
		}
		return st;
	}

	/**
	 * 新建文件
	 * 
	 * @param filePathAndName
	 *            文本文件完整绝对路径及文件名
	 * @param fileContent
	 *            文本文件内容
	 * @return
	 * @throws Exception
	 */
	public static void createFile(String filePathAndName, String fileContent)
			throws Exception {

		try {
			String filePath = filePathAndName;
			filePath = filePath.toString();
			File myFilePath = new File(filePath);
			if (!myFilePath.exists()) {
				myFilePath.createNewFile();
			}
			FileWriter resultFile = new FileWriter(myFilePath);
			PrintWriter myFile = new PrintWriter(resultFile);
			String strContent = fileContent;
			myFile.println(strContent);
			myFile.close();
			resultFile.close();
		} catch (Exception e) {
			throw new Exception("创建文件操作出错", e);
		}
	}

	/**
	 * 有编码方式的文件创建
	 * 
	 * @param filePathAndName
	 *            文本文件完整绝对路径及文件名
	 * @param fileContent
	 *            文本文件内容
	 * @param encoding
	 *            编码方式 例如 GBK 或者 UTF-8
	 * @return
	 * @throws Exception
	 */
	public static void createFile(String filePathAndName, String fileContent,
			String encoding) throws Exception {

		try {
			String filePath = filePathAndName;
			filePath = filePath.toString();
			File myFilePath = new File(filePath);
			if (!myFilePath.exists()) {
				myFilePath.createNewFile();
			}
			PrintWriter myFile = new PrintWriter(myFilePath, encoding);
			String strContent = fileContent;
			myFile.println(strContent);
			myFile.close();
		} catch (Exception e) {
			throw new Exception("创建文件操作出错", e);
		}
	}

	/**
	 * 创建文件夹
	 * 
	 * @param filePath
	 * @throws Exception
	 */
	public static String createFolder(String filePath) throws Exception {
		File file = new java.io.File(filePath);
		try {
			if (!file.exists()) {
				if (!file.mkdir()) {
					throw new IOException("创建文件夹：" + filePath + "出错");
				}
			}
			return filePath;
		} catch (Exception e) {
			throw e;
		}
	}

	/**
	 * 多级目录创建
	 * 
	 * @param folderPath
	 *            准备要在本级目录下创建新目录的目录路径 例如 E:\\Test\\java\\
	 * @param paths
	 *            无限级目录参数，各级目录以单数线区分 例如 a|b|c
	 * @return 返回创建文件夹后的路径 例如 c:myfa c
	 * @throws Exception
	 */
	public static String createFolders(String folderPath, String paths)
			throws Exception {
		String txts = folderPath;
		try {
			String txt;
			txts = folderPath;
			StringTokenizer st = new StringTokenizer(paths, "|");
			for (int i = 0; st.hasMoreTokens(); i++) {
				txt = st.nextToken().trim();
				txts = createFolder(txts + txt + "/");
			}
		} catch (Exception e) {
			throw new Exception("创建目录操作出错！", e);
		}
		return txts;
	}

	/**
	 * 复制单个文件
	 * 
	 * @param oldPathFile
	 *            准备复制的文件源
	 * @param newPathFile
	 *            拷贝到新绝对路径带文件名
	 * @return
	 * @throws Exception
	 */
	public static void copyFile(String oldPathFile, String newPathFile)
			throws Exception {
		try {
			int bytesum = 0;
			int byteread = 0;
			File oldfile = new File(oldPathFile);
			if (oldfile.exists()) { // 文件存在时
				InputStream inStream = new FileInputStream(oldPathFile); // 读入原文件
				FileOutputStream fs = new FileOutputStream(newPathFile);
				byte[] buffer = new byte[1444];
				while ((byteread = inStream.read(buffer)) != -1) {
					bytesum += byteread; // 字节数 文件大小
					System.out.println(bytesum);
					fs.write(buffer, 0, byteread);
				}
				inStream.close();
			}
		} catch (Exception e) {
			throw e;
		}
	}

	/**
	 * <p>
	 * 将sourceFolder文件夹下的内容复制到destinationFolder文件夹下
	 * </p>
	 * <p>
	 * 如destinationFolder文件夹不存在则自动创建
	 * </p>
	 * 
	 * @param sourceFolder
	 *            源文件夹 如：C:\\aaa
	 * @param destinationFolder
	 *            目标文件夹 D:\\java
	 * @throws Exception
	 */
	public static void copyFolder(String sourceFolder, String destinationFolder)
			throws Exception {
		try {
			new File(destinationFolder).mkdirs(); // 如果文件夹不存在 则建立新文件夹
			File a = new File(sourceFolder);
			String[] file = a.list();
			File temp = null;
			for (int i = 0; i < file.length; i++) {
				if (sourceFolder.endsWith(File.separator)) {
					temp = new File(sourceFolder + file[i]);
				} else {
					temp = new File(sourceFolder + File.separator + file[i]);
				}
				if (temp.isFile()) {
					FileInputStream input = new FileInputStream(temp);
					FileOutputStream output = new FileOutputStream(
							destinationFolder + "/"
									+ (temp.getName()).toString());
					byte[] b = new byte[1024 * 5];
					int len;
					while ((len = input.read(b)) != -1) {
						output.write(b, 0, len);
					}
					output.flush();
					output.close();
					input.close();
				}
				if (temp.isDirectory()) {// 如果是子文件夹
					copyFolder(sourceFolder + "/" + file[i], destinationFolder
							+ "/" + file[i]);
				}
			}
		} catch (Exception e) {
			throw new Exception("复制整个文件夹内容操作出错", e);
		}
	}

	/**
	 * 删除文件
	 * 
	 * @param filePathAndName
	 *            文本文件完整绝对路径及文件名
	 * @return Boolean 成功删除返回true遭遇异常返回false
	 */
	public static void delFile(String filePathAndName) throws Exception {
		try {
			String filePath = filePathAndName;
			File myDelFile = new File(filePath);
			if (myDelFile.exists()) {
				myDelFile.delete();
			} else {
				throw new IOException(filePathAndName + "删除文件操作出错");
			}
		} catch (IOException e) {
			throw new Exception(filePathAndName + "删除文件操作出错", e);
		}
	}

	/**
	 * 删除文件夹
	 * 
	 * @param folderPath
	 *            文件夹完整绝对路径
	 * @return
	 * @throws Exception
	 */
	public static void delFolder(String folderPath) throws Exception {

		try {
			delAllFile(folderPath);
			// 删除完里面所有内容
			String filePath = folderPath;
			filePath = filePath.toString();
			java.io.File myFilePath = new java.io.File(filePath);
			boolean result = myFilePath.delete(); // 删除空文件夹
			if (!result) {
				throw new IOException("文件夹:" + folderPath + ",删除失败");
			}
		} catch (IOException e) {
			throw new Exception("删除文件夹出错", e);
		}
	}

	/**
	 * 删除文件及文件夹下所有文件
	 * 
	 * @return
	 * @throws IOException
	 */
	public static boolean delAllFile(String filePath) throws IOException {
		File file = new File(filePath);
		if (!file.exists())// 文件夹不存在不存在
			throw new IOException("指定目录不存在:" + file.getName());
		boolean rslt = true;// 保存中间结果
		if (!(rslt = file.delete())) {// 先尝试直接删除
			// 若文件夹非空。枚举、递归删除里面内容
			File subs[] = file.listFiles();
			for (int i = 0; i <= subs.length - 1; i++) {
				if (subs[i].isDirectory())
					delAllFile(subs[i].toString());// 递归删除子文件夹内容
				rslt = subs[i].delete();// 删除子文件夹本身
			}
			// rslt = file.delete();// 删除此文件夹本身
		}

		if (!rslt)
			throw new IOException("无法删除:" + file.getName());
		// 删除文件
		return true;
	}

	/**
	 * 移动文件
	 * 
	 * @param oldPath
	 * @param newPath
	 * @return
	 * @throws Exception
	 */
	public static void moveFile(String oldPath, String newPath)
			throws Exception {

		try {
			copyFile(oldPath, newPath);
			delFile(oldPath);
		} catch (Exception e) {
			throw e;
		}

	}

	/**
	 * 移动目录
	 * 
	 * @param oldPath
	 * @param newPath
	 * @return
	 */
	public static void moveFolder(String oldPath, String newPath) {
		try {
			copyFolder(oldPath, newPath);
			delFolder(oldPath);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * <p>
	 * 取得当前类文件所在绝对路径
	 * </p>
	 * <p>
	 * 如：E:/workspace/mobile/WebRoot/WEB-INF/classes/com/mobileSky/ty/utils/
	 * </p>
	 * 
	 * @return
	 */
	public static String getClassPath() {
		String strClassName = FileUtil.class.getName();

		String strPackageName = "";
		if (FileUtil.class.getPackage() != null) {
			strPackageName = FileUtil.class.getPackage().getName();
		}

		String strClassFileName = "";
		if (!"".equals(strPackageName)) {
			strClassFileName = strClassName.substring(
					strPackageName.length() + 1, strClassName.length());
		} else {
			strClassFileName = strClassName;
		}

		URL url = null;
		url = FileUtil.class.getResource(strClassFileName + ".class");
		String strURL = url.toString();
		strURL = strURL.substring(strURL.indexOf('/') + 1, strURL
				.lastIndexOf('/'));
		return strURL + "/";
	}

	/**
	 * 取得当前项目根目录，如：E:/workspace/mobile/，其中mobile为项目名
	 * 
	 * @param projectName
	 * @return
	 */
	public static String getProject(String projectName) {
		String classPath = getClassPath();
		return classPath.substring(0, classPath.indexOf(projectName)
				+ projectName.length() + 1);
	}

	/**
	 * 将C:\aaa\dsa转换为C:/aaa/dsa
	 * 
	 * @param path
	 * @return
	 */
	public static String getStr(String path) {
		String result = "";
		char[] pathChar = path.toCharArray();
		for (int i = 0; i < pathChar.length; i++) {
			if (pathChar[i] == '\\') {
				pathChar[i] = '/';
			}
			result += pathChar[i];
		}
		return result;
	}

	public static void main(String arg[]) {

		try {
			copyFolder("E:\\百度网页\\百度指数搜索_java.files", "E:\\百度网页\\重新生产\\百度指数搜索_java.files");
			//moveFolder("E:\\百度网页\\百度指数搜索_java.files","E:\\百度网页\\xxx\\百度指数搜索_java.files");
			// delAllFile("E:\\Test\\java");
			// delFolder("E:\\Test\\java");
			// createFile("E:\\Test\\java\\a.xml",
			// "<abc>\r\n<a>\r\n</a>\r\n</abc>");
			// createFolder("E:\\Test\\java");
			// createFolders("E:\\Test\\java\\", "一级|二级|三级");
			//String a = readTxt("E:\\Test\\java\\a.xml", "GBK");
			//System.out.println(a);
		} catch (Exception e) {
			e.printStackTrace();
		} 

	}
}