回顾inputstream和outputstream

@RequestMapping("input")public void input() throws IOException {File file=new File("D:"+ File.separator+"test.txt");InputStream in=new FileInputStream("D:"+ File.separator+"test.txt");//字节转字符 防止乱码InputStreamReader re=new InputStreamReader(in,"gbk");char[] b= new char[1024];int length;length= re.read(b);System.out.println(length);System.out.println(new String(b,0,length));}@RequestMapping("out")public void out(){try {String str="asdfghj欢迎来来到输出流 写入";char[] len=str.toCharArray();byte[] len1=str.getBytes();FileOutputStream in=new FileOutputStream("D:"+ File.separator+"test.txt");//字节转字符 防止乱码OutputStreamWriter wr=new OutputStreamWriter(in,"gbk");wr.write(len,0,len.length);wr.close(); //记得要关闭，否则无效果} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}

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