从字符串转换为字节[]:

Convert from String to byte[]:

String s = "some text here";
byte[] b = s.getBytes(StandardCharsets.UTF_8);

从字节[]转换为字符串:

Convert from byte[] to String:

byte[] b = {(byte) 99, (byte)97, (byte)116};
String s = new String(b, StandardCharsets.US_ASCII);

当然，您应该使用正确的编码名称.我的示例使用了 US-ASCII 和 UTF-8，这两种最常见的编码.

You should, of course, use the correct encoding name. My examples used US-ASCII and UTF-8, the two most common encodings.