字节到流

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得到了 byte[]，转成流：

byte[] responseBody = getMethod.getResponseBody();
             SAXReader saxReader = new SAXReader();
             InputStream in = new ByteArrayInputStream(responseBody);
             InputStreamReader strInStream = new InputStreamReader(in, "GBK");

byte[] responseBody = getMethod.getResponseBody();
			SAXReader saxReader = new SAXReader();
			InputStream in = new ByteArrayInputStream(responseBody);
			InputStreamReader strInStream = new InputStreamReader(in, "GBK");

此时strInStream就可以使用了