java里面byte数组和String字符串怎么转换

//string 转 byte[]String str = "Hello";byte[] srtbyte = str.getBytes();// byte[] 转 stringString res = new String(srtbyte);System.out.println(res);//当然还有可以设定编码方式的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 blocke.printStackTrace();    }