用Java實現對檔案夾的操作__java

1、複製檔案夾

private void copyFile(File sourceFile,File targetFile){try {if(!sourceFile.exists()){return;}else{if(sourceFile.isDirectory()){if(!targetFile.exists()){targetFile.mkdirs();}File[] list=sourceFile.listFiles();for(File f:list){File newFile=new File(targetFile,f.getName());copyFile(f, newFile);}}else{if(!targetFile.exists()){targetFile.createNewFile();}FileInputStream input = new FileInputStream(sourceFile);BufferedInputStream inBuff = new BufferedInputStream(input); // 建立檔案輸出資料流並對它進行緩衝FileOutputStream output = new FileOutputStream(targetFile);BufferedOutputStream outBuff = new BufferedOutputStream(output); // 緩衝數組byte[] b = new byte[1024 * 5];int len; // 重新整理此緩衝的輸出資料流while ((len = inBuff.read(b)) != -1) {outBuff.write(b, 0, len);}outBuff.flush(); // 關閉流inBuff.close();outBuff.close();output.close();input.close();}}} catch (Exception e) {Tools.errorList(e, "複製檔案");}}

2、刪除檔案夾

private void deleteFile(File file) {if(file.exists()){if(file.isFile()){file.delete();}else if (file.isDirectory()) {File files[] = file.listFiles();               //聲明目錄下所有的檔案 files[];for(int i=0;i<files.length;i++){            //遍曆目錄下所有的檔案deleteFile(files[i]);             //把每個檔案 用這個方法進行迭代    } }file.delete();}}

3、壓縮檔夾

File XMFile=new File(filePath+"fileName"); File[] fileList = XMFile.listFiles();ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(filePath+"<span style="font-family: Arial, Helvetica, sans-serif;">fileName.</span>zip"));if (fileList.length!=0) {for (int i = 0; i < fileList.length; i++) {ZIP.zipFile(zos, fileList[i], "");}}zos.close();

    ZIP類中的方法：

<pre name="code" class="html">public static void zipFile(ZipOutputStream output, File file, String basePath) throws Exception {        FileInputStream fis = null;        BufferedInputStream bis = null;        try {            if (file.isDirectory()) {// 檔案為目錄                File list[] = file.listFiles();                basePath = basePath + (basePath.length() == 0 ? "" : "/") + file.getName();                for (File f : list) {                    zipFile(output, f, basePath);                }            } else {// 壓縮檔                basePath = (basePath.length() == 0 ? "" : basePath + "/") + file.getName();                output.putNextEntry(new ZipEntry(basePath));                fis = new FileInputStream(file);                bis = new BufferedInputStream(fis);                byte[] buf = new byte[1024];                int len;                while ((len = bis.read(buf)) != -1) {                    output.write(buf, 0, len);                }                output.flush();            }        } catch (Exception ex) {            throw ex;        } finally {            if (bis != null) {                bis.close();            }            if (fis != null) {                fis.close();            }        }    }

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">4、解壓zip檔案</span>

public static void upZIP(File unZipFile,File unZipFolder) throws Exception{  InputStream input = null;   OutputStream output = null;    ZipFile zipFile = null;  try {zipFile = new ZipFile(unZipFile);  // 建立zip檔案對象Enumeration zipEnum = zipFile.getEntries();  // 得到zip檔案條目枚舉對象  ZipEntry entry = null;  // 定義對象  String entryName = null, path = null;  String names[] = null;  int length;  while (zipEnum.hasMoreElements()) {  // 迴圈讀取條目      entry = (ZipEntry) zipEnum.nextElement();  // 得到當前條目      entryName = new String(entry.getName());      // 用/分隔條目名稱      names = entryName.split("\\/");      length = names.length;      path = unZipFolder.getAbsolutePath();    for (int v = 0; v < length; v++) {      if (v < length - 1){ // 最後一個目錄之前的目錄     File tempFile=new File(path += "/" + names[v] + "/");    if(!tempFile.exists()){    tempFile.mkdirs();    }    }else { // 最後一個      if (entryName.endsWith("/")){ // 為目錄,則建立檔案夾      File tempFile=new File(unZipFolder.getAbsolutePath()+ "/" + entryName);    if(!tempFile.exists()){    tempFile.mkdirs();    }    }else { // 為檔案,則輸出到檔案      input = zipFile.getInputStream(entry);      output = new FileOutputStream(new File(unZipFolder.getAbsolutePath()+ "/" + entryName));      byte[] buffer = new byte[1024 * 8];      int readLen = 0;      while ((readLen = input.read(buffer, 0, 1024 * 8)) != -1) {    output.write(buffer, 0, readLen);      }    if (input != null)      input.close();      if (output != null) {      output.flush();      output.close();      }    }    }      }  }    } catch (Exception ex) {    throw ex;  } finally {     try {   if (input != null)      input.close();     if (output != null) {      output.flush();      output.close();     }   if(zipFile!=null){zipFile.close();    }} catch (Exception e) {}  } }

5、把檔案寫成二進位流字串

public static String ZIPtoSTR(File file) throws Exception{ StringBuffer suf = new StringBuffer(); FileInputStream fis = null;                 int temp = 0;                 fis = new FileInputStream(file);                 while((temp = fis.read()) != -1){        <span style="white-space:pre"></span>suf.append(temp);        <span style="white-space:pre"></span>suf.append(",");        <span style="white-space:pre"></span> }         <span style="white-space:pre"></span>fis.close();return suf.toString(); }

6、把二進位流轉換為檔案

public static File STRtoZIP(String str,File file) throws Exception{ FileOutputStream fos = new FileOutputStream(file); String[] str_arr = str.split(","); for(String v:str_arr){fos.write(Integer.valueOf(v)); } fos.close(); return file; }