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android培訓、java培訓、期待與您交流！ ---------------------- 通過這個程式,可以體會到java.io.File類各種檔案的操作:import java.io.*;public class FileOperate { public FileOperate() { } public void newFolder(String folderPath) { try { String filePath = folderPath; filePath = filePath.toString(); java.io.File myFilePath = new java.io.File(filePath); if (!myFilePath.exists()) { myFilePath.mkdir(); } } catch (Exception e) { System.out.println("建立目錄操作出錯"); e.printStackTrace(); } } public void newFile(String filePathAndName, String fileContent) { 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); resultFile.close(); } catch (Exception e) { System.out.println("建立目錄操作出錯"); e.printStackTrace(); } } public void delFile(String filePathAndName) { try { String filePath = filePathAndName; filePath = filePath.toString(); java.io.File myDelFile = new java.io.File(filePath); myDelFile.delete(); } catch (Exception e) { System.out.println("刪除檔案操作出錯"); e.printStackTrace(); } } public void delFolder(String folderPath) { try { delAllFile(folderPath); //刪除完裡面所有內容 String filePath = folderPath; filePath = filePath.toString(); java.io.File myFilePath = new java.io.File(filePath); myFilePath.delete(); //刪除空檔案夾 } catch (Exception e) { System.out.println("刪除檔案夾操作出錯"); e.printStackTrace(); } } public void delAllFile(String path) { File file = new File(path); if (!file.exists()) { return; } if (!file.isDirectory()) { return; } String[] tempList = file.list(); File temp = null; for (int i = 0; i < tempList.length; i++) { if (path.endsWith(File.separator)) { temp = new File(path + tempList[i]); } else { temp = new File(path + File.separator + tempList[i]); } if (temp.isFile()) { temp.delete(); } if (temp.isDirectory()) { delAllFile(path+"/"+ tempList[i]);//先刪除檔案夾裡面的檔案 delFolder(path+"/"+ tempList[i]);//再刪除空檔案夾 } } } public void copyFile(String oldPath, String newPath) { try { int bytesum = 0; int byteread = 0; File oldfile = new File(oldPath); if (oldfile.exists()) { //檔案存在時 InputStream inStream = new FileInputStream(oldPath); //讀入原檔案 FileOutputStream fs = new FileOutputStream(newPath); byte[] buffer = new byte[1444]; int length; while ( (byteread = inStream.read(buffer)) != -1) { bytesum += byteread; //位元組數檔案大小 System.out.println(bytesum); fs.write(buffer, 0, byteread); } inStream.close(); } } catch (Exception e) { System.out.println("複製單個檔案操作出錯"); e.printStackTrace(); } } public void copyFolder(String oldPath, String newPath) { try { (new File(newPath)).mkdirs(); //如果檔案夾不存在 則建立新檔案夾 File a=new File(oldPath); String[] file=a.list(); File temp=null; for (int i = 0; i < file.length; i++) { if(oldPath.endsWith(File.separator)){ temp=new File(oldPath+file[i]); } else{ temp=new File(oldPath+File.separator+file[i]); } if(temp.isFile()){ FileInputStream input = new FileInputStream(temp); FileOutputStream output = new FileOutputStream(newPath + "/" + (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()){//如果是子檔案夾 copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]); } } } catch (Exception e) { System.out.println("複製整個檔案夾內容操作出錯"); e.printStackTrace(); } } public void moveFile(String oldPath, String newPath) { copyFile(oldPath, newPath); delFile(oldPath); } public void moveFolder(String oldPath, String newPath) { copyFolder(oldPath, newPath); delFolder(oldPath); }}---------------------- android培訓、java培訓、期待與您交流！ ----------------------
