1.md5加密时由于环境编码不一致导致（因为Linux是UTF-8，而windows是gb2312或者GBK）

2.解决方案
原先代码

public static String MD5Encode(String origin) {
		String resultString = null;
		try {
			resultString = new String(origin);
			MessageDigest md = MessageDigest.getInstance("MD5");
			resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
		} catch (Exception ex) {
		}
		return resultString.toUpperCase();
	}

改后代码

public static String MD5Encode(String origin) {
		String resultString = null;
		try {
			resultString = new String(origin);
			MessageDigest md = MessageDigest.getInstance("MD5");
			resultString = byteArrayToHexString(md.digest(resultString.getBytes("UTF-8")));
		} catch (Exception ex) {
		}
		return resultString.toUpperCase();
	}

即，把resultString.getBytes() 变为 resultString.getBytes(“UTF-8”)