下面哪段程序能够正确的实现了GBK编码字节流到UTF-8编码字节流的转换:
A dst=String.fromBytes(src,"GBK").getBytes("UTF-8")
B dst=new String(src,"GBK").getBytes("UTF-8")
C dst=new String("GBK",src).getBytes()
D dst=String.encode(String.decode(src,"GBK")),"UTF-8" )
用new String(src,"GBK")解码得到字符串
用getBytes("UTF-8")得到UTF8编码字节数组

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