微信支付 body不是UTF-8編碼以及中文簽名錯誤的問題

/** * MD5編碼 * @param origin 原始字符串 * @return 通過MD5加密以後的結果 */ public static String MD5Encode(String origin) { String resultString = null; try { resultString = origin; MessageDigest md = MessageDigest.getInstance("MD5"); // resultString = byteArrayToHexString(md.digest(resultString.getBytes()));//原文件內容，可能緣由是：win2003時系統缺省編碼爲GBK，win7爲utf-8 resultString = byteArrayToHexString(md.digest(resultString.getBytes("utf-8")));//正確的寫法 } catch (Exception e) { e.printStackTrace(); } return resultString; } private static String byteArrayToHexString(byte[] digest) {

StringBuffer hexValue = new StringBuffer();

	for (int i = 0; i < digest.length; i++) {
		int val = ((int) digest[i]) & 0xff;
		if (val < 16)
			hexValue.append("0");
		hexValue.append(Integer.toHexString(val));
	}

	return hexValue.toString();
}

	String sign = MD5Encode(parbuffer.toString());
	data.setSign(sign);
	HttpRequest httpRequest = HttpRequest.post("https://api.mch.weixin.qq.com/pay/unifiedorder");
	String x = xstream.toXML(data);
	httpRequest.body( StringUtil.convertCharset(x, "UTF-8", "ISO-8859-1"));
	HttpResponse response = httpRequest.send();
	String body = response.body();
	body = StringUtil.convertCharset(body, "ISO-8859-1", "UTF-8");

這樣就把問題解決了 注意一下：給微信提交數據的時候須要是ISO-8859-1編碼

httpRequest.body( StringUtil.convertCharset(x, "UTF-8", "ISO-8859-1"));