总结File操作

package com.pnova.togo.util;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.io.Writer;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;/** * * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2005</p> * <p>Company: </p> * @author keith * @version 1.0 */public class FileUtil {/** log */private static Log log = LogFactory.getLog(FileUtil.class);/** * 建立目录 * @param folder String 目录名称 * @throws FilesException * @throws NoExistException */public static void createFolder(String folder) {if (folder != null && !folder.equals("")) {boolean success = true;File fileDirectory = new File(folder);if (!fileDirectory.exists()) {success = fileDirectory.mkdirs();}fileDirectory = null;if (!success) {} else {return;}} else {log.info("输入目录为空！");}}/** * 删除目录 * @param folder String * @throws FilesException */public static void deleteFolder(String folder) {boolean success = true;File fileDirectory = new File(folder);if (fileDirectory.exists()) {fileDirectory.delete();}if (!success) {} else {return;}}/** * 建立文件 * @param folder String 目录名 * @param fileName String 文件名 * @param htmlText String 内容 * @throws FilesException * @throws NoExistException * @throws IOException */public static void createFile(String folder, String fileName, String text)throws IOException {if (fileName == null || fileName.equals("")) {throw new IOException("文件路径为空");} else {createFolder(folder);//建立一个文件 文件名为fileNameString newFileName = folder + fileName;System.out.println(newFileName);File file = new File(newFileName);log.debug("url===" + file.toURI());if (file.exists()) {log.debug("原文件已被覆盖");}//file对象建立一个新文件file.createNewFile();//new一个文件些对象OutputStreamWriter outputStreamWriter = new OutputStreamWriter(new FileOutputStream(newFileName), "UTF-8");Writer writer = new BufferedWriter(outputStreamWriter);PrintWriter printWriter = new PrintWriter(writer);StringBuffer sbuffer = new StringBuffer(text);printWriter.print(sbuffer);writer.close();printWriter.close();outputStreamWriter.close();}}/** * 建立文件 * @param folder String 目录名 * @param fileName String 文件名 * @param htmlText String 内容 * @throws FilesException * @throws NoExistException * @throws IOException */// public static void createFile(String folder, String fileName, String text) throws// FilesFileException, NoExistFileException, IOException {// if (fileName == null || fileName.equals("")) {//// throw new FilesFileException("文件路径为空");// }// else {// createFolder(folder);// //建立一个文件 文件名为fileName// String newFileName = folder + fileName;// File file = new File(newFileName);// log.debug("url===" + file.toURI());//// if (file.exists()) {// log.debug("原文件已被覆盖");// }// //file对象建立一个新文件// file.createNewFile();// //new一个文件些对象// FileWriter fileWriter = new FileWriter(newFileName);// Writer writer = new BufferedWriter(fileWriter);// PrintWriter printWriter = new PrintWriter(writer);// StringBuffer sbuffer = new StringBuffer(text);// printWriter.print(sbuffer);// writer.close();// printWriter.close();// fileWriter.close();// }// }/** * 移动文件 * @param srcFileName String 要移动的文件 * @param desFolder String 要移动到的目标目录 * @throws FilesException * @throws NoExistException */public static void moveFile(String srcFileName, String desFolder) {boolean success = true;File srcFile = new File(srcFileName);createFolder(desFolder);String fileName = srcFile.getName();String desFileName = String.valueOf(String.valueOf((new StringBuffer(String.valueOf(String.valueOf(desFolder)))).append(File.separatorChar).append(fileName)));File desFile = new File(desFileName);srcFile.renameTo(desFile);if (!success) {} else {return;}}/** * 删除文件 * @param srcFileName String * @throws FilesException */public static void deleteFile(String srcFileName) {boolean success = true;File file = new File(srcFileName);if (file.exists()) {file.delete();}if (!success) {} else {return;}}/** * 获取文件的扩展名 * @param fileName 文件名 * @return */public static String getFileExt(String fileName) {if (fileName == null) {return "";}int pos = fileName.lastIndexOf(".");if (pos == -1) {return "";}return fileName.substring(pos + 1);}/** * filePath路径下是否存在文件file * @param filePath 文件路径 * @param file 文件名 * @return boolean */public static boolean isFileExist(String filePath, String file) {if (filePath == null || file == null) {return false;}String absPath = null;if (filePath.endsWith("/") || filePath.endsWith("//")) {absPath = filePath + file;} else {absPath = filePath + File.separator + file;}return (new File(absPath)).exists();}public static String ReadFile(String absolutePath) {String resultStr = "";String fileStr = "";try {File file = new File(absolutePath);FileInputStream in = new FileInputStream(file);BufferedReader bu = new BufferedReader(new InputStreamReader(in,"UTF-8"));while ((fileStr = bu.readLine()) != null) {resultStr = resultStr + fileStr;}bu.close();} catch (Exception e) {System.out.println("读取数据错误");}return resultStr;}public static void main(String agr[]) {//得到文件名后缀// log.debug(f.getFileExt("fs.tss"));//文件是否存在于某个目录中// log.debug(f.isFileExist("c://moveFile//", "out.txt"));try {//f.moveFile("C://zz//1//out.txt", "c://moveFile//");//f.deleteFile("c://moveFile//out.txt");//f.createFile("c://moveFile//", "zz.txt", "tamade");//createFolder("c://moveFile//case");System.out.println(ReadFile("f:/test.txt"));} catch (Exception e) {}}}