您的字节数组必须有一些编码。如果您有负值，则编码不能是ASCII。一旦弄明白，就可以使用以下命令将一组字节转换为字符串：

Your byte array must have some encoding. The encoding cannot be ASCII if you've got negative values. Once you figure that out, you can convert a set of bytes to a String using:

byte[] bytes = {...}
String str = new String(bytes, "UTF-8"); // for UTF-8 encoding

您可以使用一堆编码，查看Charset Sun javadocs 中的类。

There are a bunch of encodings you can use, look at the Charset class in the Sun javadocs.