java File文件处理工具类

package cn.rojao.utils; import java.io.BufferedReader; import java.io.BufferedWriter; 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.OutputStream; import java.io.OutputStreamWriter; import java.io.Writer; import java.net.HttpURLConnection; import java.net.URL; public class FileUtils { /** * 从输入流中读取string * @param inputStream * @return */ public static String getString(InputStream inputStream){ String returnStr = ""; try{ BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "utf-8")); StringBuffer sb = new StringBuffer(); String str = ""; while ((str = reader.readLine()) != null) { sb.append(str).append("\n"); } returnStr = sb.toString(); }catch(Exception e){ } return returnStr; } /** * 新建一个文件并写入内容 * * @param String path 文件全路径 * @param String fileName 文件名 * @param String content 内容 * @param int bufLen 设置缓冲区大小 * @param boolean isWrite 是否追加写入文件 * @return boolean * @throws IOException */ public static boolean newStaticFile(String path, String fileName, String content, int bufLen, boolean isWrite) { if (path == null || path.equals("") || content == null || content.equals("")) return false; boolean flag = false; File file = new File(path); if (!file.exists()) { file.mkdirs(); } FileOutputStream fos = null; Writer out = null; try { fos = new FileOutputStream(path + File.separator + fileName, isWrite); out = new BufferedWriter(new OutputStreamWriter(fos, "UTF-8"), bufLen); out.write(content); out.flush(); flag = true; //log.info(content); } catch (IOException e) { System.out.println("写入文件出错"); flag = false; } finally { if (out != null) { try { out.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if (fos != null) { try { fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } return flag; } /** * 复制一个目录及其子目录、文件到另外一个目录 * @param src * @param dest * @throws IOException */ public static void copyFolder(File src, File dest){ try{ if (src.isDirectory()) { if (!dest.exists()) { dest.mkdir(); } String files[] = src.list(); for (String file : files) { File srcFile = new File(src, file); File destFile = new File(dest, file); // 递归复制 copyFolder(srcFile, destFile); } } else { InputStream in = new FileInputStream(src); OutputStream out = new FileOutputStream(dest); byte[] buffer = new byte[1024]; int length; while ((length = in.read(buffer)) > 0) { out.write(buffer, 0, length); } in.close(); out.close(); } }catch(Exception e){ e.printStackTrace(); } } /** * 递归删除目录下的所有文件及子目录下所有文件 * @param dir 将要删除的文件目录 * @return boolean Returns "true" if all deletions were successful. * If a deletion fails, the method stops attempting to * delete and returns "false". */ public static boolean deleteDir(File dir) { if (dir.isDirectory()) { String[] children = dir.list(); for (int i=0; i<children.length; i++) { boolean success = deleteDir(new File(dir, children[i])); if (!success) { return false; } } } // 目录此时为空，可以删除 return dir.delete(); } /** * 复制单个文件 * * @param oldPath * String 原文件路径 如：c:/fqf.txt * @param newPath * String 复制后路径 如：f:/ * @return boolean */ public static boolean copyFile(String oldPath, String newPath, String newFileName) throws IOException { boolean flag = false; if (oldPath == null || newPath == null || newPath.equals("") || oldPath.equals("")) { return flag; } InputStream inStream = null; FileOutputStream fs = null; try { int bytesum = 0; int byteread = 0; File file = null; file = new File(newPath); if (!file.exists()) { file.mkdirs(); } file = new File(oldPath); if (file.exists()) { // 文件存在时 inStream = new FileInputStream(oldPath); // 读入原文件 if (newFileName == null || newFileName.equals("")) { newFileName = file.getName(); } fs = new FileOutputStream(newPath + File.separator + newFileName); byte[] buffer = new byte[1024 * 8]; while ((byteread = inStream.read(buffer)) != -1) { bytesum += byteread; // 字节数 文件大小 // System.out.println(bytesum); fs.write(buffer, 0, byteread); } flag = true; } } catch (IOException e) { throw e; } finally { try { if (fs != null) { fs.close(); } if (inStream != null) { inStream.close(); } } catch (IOException e) { throw e; } } return flag; } /** * 读取文本文件内容，以行的形式读取 * * @param String * filePathAndName 带有完整绝对路径的文件名 * @return String 返回文本文件的内容 */ public static String readFileContent(String filePathAndName) throws IOException { return readFileContent(filePathAndName, null, null, 1024); } /** * 读取文本文件内容，以行的形式读取 * * @param String * filePathAndName 带有完整绝对路径的文件名 * @param String * encoding 文本文件打开的编码方式 例如 GBK,UTF-8 * @param String * sep 分隔符 例如：#，默认为/n; * @param int * bufLen 设置缓冲区大小 * @return String 返回文本文件的内容 */ public static String readFileContent(String filePathAndName, String encoding, String sep, int bufLen) throws IOException { if (filePathAndName == null || filePathAndName.equals("")) { return ""; } if (sep == null || sep.equals("")) { sep = System.getProperty("line.separator"); } if (!new File(filePathAndName).exists()) { return ""; } StringBuffer str = new StringBuffer(""); FileInputStream fs = null; InputStreamReader isr = null; BufferedReader br = null; try { fs = new FileInputStream(filePathAndName); if (encoding == null || encoding.trim().equals("")) { isr = new InputStreamReader(fs); } else { isr = new InputStreamReader(fs, encoding.trim()); } br = new BufferedReader(isr, bufLen); String data = ""; while ((data = br.readLine()) != null) { if(!str.toString().isEmpty()){ str.append(sep); } str.append(data); } } catch (IOException e) {