/**
* 用filterOffUtf8Mb4
* Description: 过滤率四个字节的utf-8字符（emoji表情符）,替换成四个空格。
* 四字节utf-8字符mysql存储报错
* @Version1.0
* @param s
* @return
* @throws UnsupportedEncodingException
* @throws Exception
*/
public static String parseUtf8(String s) throws UnsupportedEncodingException {
byte[] b = s.getBytes("utf-8");
for(int i=0, len=b.length; i<len; i++){
if ((b[i] & 0xF8) == 0xF0) {//F8=1111 1000,F0=1111 0000过滤4位UTF8编码（字头11110xxx）
b[i++] = 32;
b[i++] = 32;
b[i++] = 32;
b[i++] = 32;
}
else if ((b[i] & 0xFC) == 0xF8) {//FC=1111 1100,F8=1111 1000过滤5位UTF8编码（字头111110xx）
b[i++] = 32;
b[i++] = 32;
b[i++] = 32;
b[i++] = 32;
b[i++] = 32;
}
else if ((b[i] & 0xFE) == 0xFC) {//FE=1111 1110,FC=1111 1100,过滤6位UTF8编码（字头1111110x）
b[i++] = 32;
b[i++] = 32;
b[i++] = 32;
b[i++] = 32;
b[i++] = 32;
b[i++] = 32;
}
}
return new String(b, "utf-8");
}