java自学中的一些小问题（IO流）

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IO流：

解决读文件后中文乱码问题（在inputstream中设置读取文件的格式）

FileInputStream fis = new FileInputStream(new File("E:/战网/Hearthstone/Strings/zhCN/CREDITS_2014.txt"));InputStreamReader is = new InputStreamReader(fis, "utf-8");BufferedReader br = new BufferedReader(is);String s = null;while((s = br.readLine())!= null){System.out.println(s);}

采用缓冲数组读取文件提高效率

BufferedInputStream bis = new BufferedInputStream(new FileInputStream(String path));File descFile = new File("F://1.avi");FileOutputStream fos = new FileOutputStream(descFile);BufferedOutputStream bos = new BufferedOutputStream(fos);OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream(descFile));BufferedWriter bw = new long before = System.currentTimeMillis();byte[] b = new byte[1024*3];int hasRead = 0;while((hasRead = bis.read(b))!= -1){bos.write(b, 0, hasRead);bos.flush();}

复制一个文件夹

public static void copyFolder(File srcFile, File destFile) {File[] files = srcFile.listFiles();for (File f : files) {if (f.isDirectory()) {//File类的构造函数（destFile是f.getName()的上一级目录）File toFile = new File(destFile,f.getName()); toFile.mkdirs();copyFolder(f, toFile);} else {File toFile = new File(destFile, f.getName());copyFile(f, toFile);}}}

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