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本文实例为大家分享了java文件处理工具类的具体代码,供大家参考,具体内容如下
import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileFilter; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.ObjectInputStream; import java.io.ObjectOutput; import java.io.ObjectOutputStream; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.Writer; import java.net.URL; import java.net.URLEncoder; import java.text.DecimalFormat; import java.util.ArrayList; import java.util.Collections; import java.util.Enumeration; import java.util.List; import java.util.Properties; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public class FileUtil { private static Log logger = LogFactory.getLog(FileUtil.class); public static void writeFile(String paramString1, String paramString2) { writeFile(paramString1, paramString2, "utf-8"); } public static void writeFile(String paramString1, String paramString2, String paramString3) { try { createFolder(paramString1, true); BufferedWriter localBufferedWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(paramString1), paramString3)); localBufferedWriter.write(paramString2); localBufferedWriter.close(); } catch (IOException localIOException) { localIOException.printStackTrace(); } } public static void writeFile(String paramString, InputStream paramInputStream) throws IOException { FileOutputStream localFileOutputStream = new FileOutputStream(paramString); byte[] arrayOfByte = new byte['Ȁ']; int i = 0; while ((i = paramInputStream.read(arrayOfByte)) != -1) { localFileOutputStream.write(arrayOfByte, 0, i); } paramInputStream.close(); localFileOutputStream.close(); } public static String readFile(String paramString) throws IOException { try { File localFile = new File(paramString); String str1 = getCharset(localFile); StringBuffer localStringBuffer = new StringBuffer(); BufferedReader localBufferedReader = new BufferedReader(new InputStreamReader(new FileInputStream(paramString), str1)); String str2; while ((str2 = localBufferedReader.readLine()) != null) { localStringBuffer.append(str2 + "\r\n"); } localBufferedReader.close(); return localStringBuffer.toString(); } catch (IOException localIOException) { throw localIOException; } } public static boolean isExistFile(String paramString) { boolean bool = false; File localFile = new File(paramString); if (localFile.isDirectory()) { File[] arrayOfFile = localFile.listFiles(); if ((arrayOfFile != null) && (arrayOfFile.length != 0)) { bool = true; } } return bool; } public static String getCharset(File paramFile) { String str = "GBK"; byte[] arrayOfByte = new byte[3]; try { int i = 0; BufferedInputStream localBufferedInputStream = new BufferedInputStream(new FileInputStream(paramFile)); localBufferedInputStream.mark(0); int j = localBufferedInputStream.read(arrayOfByte, 0, 3); if (j == -1) { return str; } if ((arrayOfByte[0] == -1) && (arrayOfByte[1] == -2)) { str = "UTF-16LE"; i = 1; } else if ((arrayOfByte[0] == -2) && (arrayOfByte[1] == -1)) { str = "UTF-16BE"; i = 1; } else if ((arrayOfByte[0] == -17) && (arrayOfByte[1] == -69) && (arrayOfByte[2] == -65)) { str = "UTF-8"; i = 1; } localBufferedInputStream.reset(); if (i == 0) { int k = 0; while ((j = localBufferedInputStream.read()) != -1) { k++; if ((j < 240) && ((128 > j) || (j > 191))) { if ((192 <= j) && (j <= 223)) { j = localBufferedInputStream.read(); if (128 > j) { break; } if (j > 191) { break; } } else if ((224 <= j) && (j <= 239)) { j = localBufferedInputStream.read(); if ((128 <= j) && (j <= 191)) { j = localBufferedInputStream.read(); if ((128 <= j) && (j <= 191)) { str = "UTF-8"; } } } } } } localBufferedInputStream.close(); } catch (Exception localException) { localException.printStackTrace(); } return str; } public static byte[] readByte(InputStream paramInputStream) { try { byte[] arrayOfByte = new byte[paramInputStream.available()]; paramInputStream.read(arrayOfByte); return arrayOfByte; } catch (FileNotFoundException localFileNotFoundException) { logger.error("文件路径不存在:" + localFileNotFoundException.getMessage()); } catch (Exception localException) { localException.printStackTrace(); } return null; } public static byte[] readByte(String paramString) { try { FileInputStream localFileInputStream = new FileInputStream(paramString); byte[] arrayOfByte = new byte[localFileInputStream.available()]; localFileInputStream.read(arrayOfByte); localFileInputStream.close(); return arrayOfByte; } catch (FileNotFoundException localFileNotFoundException) { logger.error("文件路径不存在:" + paramString); } catch (Exception localException) { localException.printStackTrace(); } return null; } public static boolean writeByte(String paramString, byte[] paramArrayOfByte) { try { BufferedOutputStream localBufferedOutputStream = new BufferedOutputStream(new FileOutputStream(paramString)); localBufferedOutputStream.write(paramArrayOfByte); localBufferedOutputStream.close(); return true; } catch (Exception localException) { localException.printStackTrace(); } return false; } public static boolean deleteDir(File paramFile) { if (paramFile.isDirectory()) { String[] arrayOfString = paramFile.list(); for (int i = 0; i < arrayOfString.length; i++) { boolean bool = deleteDir(new File(paramFile, arrayOfString[i])); if (!bool) { return false; } } } return paramFile.delete(); } public static void serializeToFile(Object paramObject, String paramString) { try { ObjectOutputStream localObjectOutputStream = new ObjectOutputStream(new FileOutputStream(paramString)); localObjectOutputStream.writeObject(paramObject); localObjectOutputStream.close(); } catch (IOException localIOException) { localIOException.printStackTrace(); } } public static Object deserializeFromFile(String paramString) { try { File localFile = new File(paramString); ObjectInputStream localObjectInputStream = new ObjectInputStream(new FileInputStream(localFile)); Object localObject = localObjectInputStream.readObject(); localObjectInputStream.close(); return localObject; } catch (Exception localException) { localException.printStackTrace(); } return null; } public static String inputStream2String(InputStream paramInputStream, String paramString) throws IOException { BufferedReader localBufferedReader = new BufferedReader(new InputStreamReader(paramInputStream, paramString)); StringBuffer localStringBuffer = new StringBuffer(); String str = ""; while ((str = localBufferedReader.readLine()) != null) { localStringBuffer.append(str + "\n"); } return localStringBuffer.toString(); } public static String inputStream2String(InputStream paramInputStream) throws IOException { return inputStream2String(paramInputStream, "utf-8"); } public static File[] getFiles(String paramString) { File localFile = new File(paramString); return localFile.listFiles(); } public static void createFolderFile(String paramString) { createFolder(paramString, true); } public static void createFolder(String paramString, boolean paramBoolean) { if (paramBoolean) { paramString = paramString.substring(0, paramString.lastIndexOf(File.separator)); } File localFile = new File(paramString); if (!localFile.exists()) { localFile.mkdirs(); } } public static void createFolder(String paramString1, String paramString2) { paramString1 = StringUtil.trimSufffix(paramString1, File.separator) + File.separator + paramString2; File localFile = new File(paramString1); localFile.mkdir(); } public static void renameFolder(String paramString1, String paramString2) { File localFile = new File(paramString1); if (localFile.exists()) { localFile.renameTo(new File(paramString2)); } } public static ArrayList<File> getDiretoryOnly(File paramFile) { ArrayList localArrayList = new ArrayList(); if ((paramFile != null) && (paramFile.exists()) && (paramFile.isDirectory())) { File[] arrayOfFile = paramFile.listFiles(new FileFilter() { public boolean accept(File paramAnonymousFile) { return paramAnonymousFile.isDirectory(); } }); for (int i = 0; i < arrayOfFile.length; i++) { localArrayList.add(arrayOfFile[i]); } } return localArrayList; } public ArrayList<File> getFileOnly(File paramFile) { ArrayList localArrayList = new ArrayList(); File[] arrayOfFile = paramFile.listFiles(new FileFilter() { public boolean accept(File paramAnonymousFile) { return paramAnonymousFile.isFile(); } }); for (int i = 0; i < arrayOfFile.length; i++) { localArrayList.add(arrayOfFile[i]); } return localArrayList; } public static boolean deleteFile(String paramString) { File localFile = new File(paramString); return localFile.delete(); } public static boolean copyFile(String paramString1, String paramString2) { File localFile1 = new File(paramString1); File localFile2 = new File(paramString2); FileInputStream localFileInputStream = null; FileOutputStream localFileOutputStream = null; try { localFileInputStream = new FileInputStream(localFile1); localFileOutputStream = new FileOutputStream(localFile2); byte[] arrayOfByte = new byte['က']; int i; while ((i = localFileInputStream.read(arrayOfByte)) != -1) { localFileOutputStream.write(arrayOfByte, 0, i); } localFileOutputStream.flush(); localFileOutputStream.close(); localFileInputStream.close(); } catch (IOException localIOException) { localIOException.printStackTrace(); return false; } return true; } public static void backupFile(String paramString) { String str = paramString + ".bak"; File localFile = new File(str); if (localFile.exists()) { localFile.delete(); } copyFile(paramString, str); } public static String getFileExt(File paramFile) { if (paramFile.isFile()) { return getFileExt(paramFile.getName()); } return ""; } public static String getFileExt(String paramString) { int i = paramString.lastIndexOf("."); if (i > -1) { return paramString.substring(i + 1).toLowerCase(); } return ""; } public static void copyDir(String paramString1, String paramString2) throws IOException { new File(paramString2).mkdirs(); File[] arrayOfFile = new File(paramString1).listFiles(); for (int i = 0; i < arrayOfFile.length; i++) { if (arrayOfFile[i].isFile()) { String str1 = arrayOfFile[i].getAbsolutePath(); String str2 = paramString2 + "/" + arrayOfFile[i].getName(); copyFile(str1, str2); } if (arrayOfFile[i].isDirectory()) { copyDirectiory(paramString1 + "/" + arrayOfFile[i].getName(), paramString2 + "/" + arrayOfFile[i].getName()); } } } private static void copyDirectiory(String paramString1, String paramString2) throws IOException { new File(paramString2).mkdirs(); File[] arrayOfFile = new File(paramString1).listFiles(); for (int i = 0; i < arrayOfFile.length; i++) { if (arrayOfFile[i].isFile()) { String str1 = arrayOfFile[i].getAbsolutePath(); String str2 = paramString2 + "/" + arrayOfFile[i].getName(); copyFile(str1, str2); } if (arrayOfFile[i].isDirectory()) { copyDirectiory(paramString1 + "/" + arrayOfFile[i].getName(), paramString2 + "/" + arrayOfFile[i].getName()); } } } public static String getFileSize(File paramFile) throws IOException { if (paramFile.isFile()) { FileInputStream localFileInputStream = new FileInputStream(paramFile); int i = localFileInputStream.available(); localFileInputStream.close(); return getSize(i); } return ""; } public static String getSize(double paramDouble) { DecimalFormat localDecimalFormat = new DecimalFormat("0.00"); double d; if (paramDouble > 1048576.0D) { d = paramDouble / 1048576.0D; return localDecimalFormat.format(d) + " M"; } if (paramDouble > 1024.0D) { d = paramDouble / 1024.0D; return localDecimalFormat.format(d) + " KB"; } return paramDouble + " bytes"; } public static void downLoadFile(HttpServletRequest paramHttpServletRequest, HttpServletResponse paramHttpServletResponse, String paramString1, String paramString2) throws IOException { ServletOutputStream localServletOutputStream = paramHttpServletResponse.getOutputStream(); File localFile = new File(paramString1); if (localFile.exists()) { paramHttpServletResponse.setContentType("APPLICATION/OCTET-STREAM"); String str1 = getFileExt(paramString1); if ((!Validation.isEmpty(str1)) && (str1.toLowerCase().equals("apk"))) { paramHttpServletResponse.setContentType("application/vnd.android.package-archive"); } String str2 = paramString2; String str3 = paramHttpServletRequest.getHeader("USER-AGENT"); if ((str3 != null) && (str3.indexOf("MSIE") == -1)) { try { String localObject1 = transCharacter(paramHttpServletRequest, str2); paramHttpServletResponse.setHeader("Content-Disposition", "attachment; filename=" + (String)localObject1); } catch (Exception localException1) { localException1.printStackTrace(); } } else { str2 = URLEncoder.encode(str2, "utf-8"); paramHttpServletResponse.addHeader("Content-Disposition", "attachment;filename=" + str2); } Object localObject1 = null; try { localServletOutputStream = paramHttpServletResponse.getOutputStream(); localObject1 = new FileInputStream(paramString1); byte[] arrayOfByte = new byte['Ѐ']; int i = 0; while ((i = ((FileInputStream)localObject1).read(arrayOfByte)) > 0) { localServletOutputStream.write(arrayOfByte, 0, i); } localServletOutputStream.flush(); } catch (Exception localException2) { localException2.printStackTrace(); } finally { if (localObject1 != null) { ((FileInputStream)localObject1).close(); localObject1 = null; } if (localServletOutputStream != null) { localServletOutputStream.close(); localServletOutputStream = null; paramHttpServletResponse.flushBuffer(); } } } else { localServletOutputStream.write("文件不存在!".getBytes("utf-8")); } } private static String transCharacter(HttpServletRequest paramHttpServletRequest, String paramString) throws Exception { if (paramHttpServletRequest.getHeader("USER-AGENT").toLowerCase().indexOf("msie") > 0) { return URLEncoder.encode(paramString, "UTF-8"); } if (paramHttpServletRequest.getHeader("USER-AGENT").toLowerCase().indexOf("firefox") > 0) { return new String(paramString.getBytes("UTF-8"), "ISO8859-1"); } return new String(paramString.getBytes("gbk"), "ISO8859-1"); } public static String getParentDir(String paramString1, String paramString2) { File localFile = new File(paramString2); String str1 = localFile.getParent(); String str2 = str1.replace(paramString1, ""); return str2.replace(File.separator, "/"); } public static String getClassesPath() { String str = StringUtil.trimSufffix(AppUtil.getRealPath("/"), File.separator) + "\\WEB-INF\\classes\\".replace("\\", File.separator); return str; } public static String getRootPath() { String str = StringUtil.trimSufffix(AppUtil.getRealPath("/"), File.separator) + File.separator; return str; } public static String readFromProperties(String paramString1, String paramString2) { String str1 = ""; BufferedInputStream localBufferedInputStream = null; try { localBufferedInputStream = new BufferedInputStream(new FileInputStream(paramString1)); Properties localProperties = new Properties(); localProperties.load(localBufferedInputStream); str1 = localProperties.getProperty(paramString2); String str2 = str1; return str2; } catch (Exception localException) { localException.printStackTrace(); } finally { if (localBufferedInputStream != null) { try { localBufferedInputStream.close(); } catch (IOException localIOException3) { localIOException3.printStackTrace(); } } } return str1; } public static boolean saveProperties(String paramString1, String paramString2, String paramString3) { StringBuffer localStringBuffer = new StringBuffer(); int i = 0; BufferedReader localBufferedReader = null; try { localBufferedReader = new BufferedReader(new InputStreamReader(new FileInputStream(paramString1), "utf-8")); String str; while ((str = localBufferedReader.readLine()) != null) { if (str.startsWith(paramString2)) { localStringBuffer.append(paramString2 + "=" + paramString3 + "\r\n"); i = 1; } else { localStringBuffer.append(str + "\r\n"); } } if (i == 0) { localStringBuffer.append(paramString2 + "=" + paramString3 + "\r\n"); } writeFile(paramString1, localStringBuffer.toString(), "utf-8"); boolean bool1 = true; return bool1; } catch (Exception localException) { localException.printStackTrace(); boolean bool2 = false; return bool2; } finally { if (localBufferedReader != null) { try { localBufferedReader.close(); } catch (IOException localIOException3) { localIOException3.printStackTrace(); } } } } public static boolean delProperties(String paramString1, String paramString2) { StringBuffer localStringBuffer = new StringBuffer(); BufferedReader localBufferedReader = null; try { localBufferedReader = new BufferedReader(new InputStreamReader(new FileInputStream(paramString1), "utf-8")); String str; while ((str = localBufferedReader.readLine()) != null) { if (!str.startsWith(paramString2)) { localStringBuffer.append(str + "\r\n"); } } writeFile(paramString1, localStringBuffer.toString(), "utf-8"); boolean bool1 = true; return bool1; } catch (Exception localException) { localException.printStackTrace(); boolean bool2 = false; return bool2; } finally { if (localBufferedReader != null) { try { localBufferedReader.close(); } catch (IOException localIOException3) { localIOException3.printStackTrace(); } } } } public static List<Class<?>> getAllClassesByInterface(Class<?> paramClass, boolean paramBoolean) throws IOException, ClassNotFoundException, IllegalStateException { if (!paramClass.isInterface()) { throw new IllegalStateException("Class not a interface."); } ClassLoader localClassLoader = paramClass.getClassLoader(); String str = paramBoolean ? paramClass.getPackage().getName() : "/"; return findClasses(paramClass, localClassLoader, str); } private static List<Class<?>> findClasses(Class<?> paramClass, ClassLoader paramClassLoader, String paramString) throws IOException, ClassNotFoundException { ArrayList localArrayList = new ArrayList(); String str = paramString.replace(".", "/"); Object localObject; if (!str.equals("/")) { localObject = paramClassLoader.getResources(str); while (((Enumeration)localObject).hasMoreElements()) { URL localURL = (URL)((Enumeration)localObject).nextElement(); localArrayList.addAll(findResources(paramClass, new File(localURL.getFile()), paramString)); } } else { localObject = paramClassLoader.getResource("").getPath(); localArrayList.addAll(findResources(paramClass, new File((String)localObject), paramString)); } return localArrayList; } private static List<Class<?>> findResources(Class<?> paramClass, File paramFile, String paramString) throws ClassNotFoundException { ArrayList localArrayList = new ArrayList(); if (!paramFile.exists()) { return Collections.EMPTY_LIST; } File[] arrayOfFile1 = paramFile.listFiles(); for (File localFile : arrayOfFile1) { if (localFile.isDirectory()) { if (!localFile.getName().contains(".")) { if (!paramString.equals("/")) { localArrayList.addAll(findResources(paramClass, localFile, paramString + "." + localFile.getName())); } else { localArrayList.addAll(findResources(paramClass, localFile, localFile.getName())); } } } else if (localFile.getName().endsWith(".class")) { Class localClass = null; if (!paramString.equals("/")) { localClass = Class.forName(paramString + "." + localFile.getName().substring(0, localFile.getName().length() - 6)); } else { localClass = Class.forName(localFile.getName().substring(0, localFile.getName().length() - 6)); } if ((paramClass.isAssignableFrom(localClass)) && (!paramClass.equals(localClass))) { localArrayList.add(localClass); } } } return localArrayList; } public static Object cloneObject(Object paramObject) throws Exception { ByteArrayOutputStream localByteArrayOutputStream = new ByteArrayOutputStream(); ObjectOutputStream localObjectOutputStream = new ObjectOutputStream(localByteArrayOutputStream); localObjectOutputStream.writeObject(paramObject); ByteArrayInputStream localByteArrayInputStream = new ByteArrayInputStream(localByteArrayOutputStream.toByteArray()); ObjectInputStream localObjectInputStream = new ObjectInputStream(localByteArrayInputStream); return localObjectInputStream.readObject(); } public static boolean isFileType(String paramString1, String paramString2) { boolean bool = false; if (("IMAGE".equals(paramString2)) && ((paramString1.toUpperCase().equals("JPG")) || (paramString1.toUpperCase().equals("PNG")) || (paramString1.toUpperCase().equals("GIF")) || (paramString1.toUpperCase().equals("JPEG")))) { bool = true; } return bool; } public static boolean isFileType(String paramString, String[] paramArrayOfString) { boolean bool = false; if ((paramArrayOfString != null) && (paramArrayOfString.length > 0)) { for (int i = 0; i < paramArrayOfString.length; i++) { if (paramString.toUpperCase().equals(paramArrayOfString[i].toUpperCase())) { return true; } } } return bool; } public static boolean isErrorFileType(String paramString) { String[] arrayOfString = null; String str = AppConfigUtil.get("File_Filter_Val"); if ((AppConfigUtil.getICache("FILEFILTER_KEY") == null) && (str != null)) { arrayOfString = str.split("\\|"); AppConfigUtil.setICache("FILEFILTER_KEY", arrayOfString); } else { arrayOfString = (String[])AppConfigUtil.getICache("FILEFILTER_KEY"); } return isFileType(paramString, arrayOfString); } }
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