Java中byte怎么转化为String

String str = "abcd";
byte[] bs = str.getBytes();

/*String str1 = "abcd";
byte[] bs1 = str1.getBytes();*/
byte[] bs1 = {97,98,100};
String s = new String(bs1);

byte[] srtbyte = {97,98,98};
String res = new String(srtbyte,"UTF-8");