用于Base64解码的Python和Java之间的区别

byte在Java中是8位签名.所以你会得到负值.

更改

System.out.println(s[i]);

至

System.out.println(s[i]&0xff);

获得相同的价值观.

更新:我刚看到Java 8引入了Byte.toUnsignedInt().这可能更具可读性:

System.out.println(Byte.toUnsignedInt(s[i]));