1、string 轉 byte[] String str = "Hello";byte[] srtbyte = str.getBytes();

2、byte[] 轉 string byte[] srtbyte;String res = new String(srtbyte);System.out.println(res);

3、設定編碼方式相互轉換 String str = "hello";byte[] srtbyte = null;try { srtbyte = str.getBytes("UTF-8"); String res = new String(srtbyte,"UTF-8"); System.out.println(res);} catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace();}