mysql utf8mb4与emoji表情

ALTER TABLE topic MODIFY COLUMN content varchar(500) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘内容‘; 

CREATE TABLE `ios_emoji` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT ‘自增ID‘,
  `unicode` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘Unicode编码‘,
  `utf8` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘UTF8编码‘,
  `utf16` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘UTF16编码‘,
  `sbunicode` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘SBUnicode编码‘,
  `filename` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT ‘文件名‘,
  `filebyte` longblob COMMENT ‘文件内容字节‘,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=COMPACT COMMENT=‘ios表情编码表‘;

import java.io.UnsupportedEncodingException;
import org.apache.commons.lang.StringUtils;


public class IOSEmojiUtil {
    
    public static String[] ios5emoji ;
    public static String[] ios4emoji ;
    public static String[] androidnullemoji ;
    public static String[] adsbuniemoji;
    
    public static void initios5emoji(String[] i5emj,String[] i4emj,String[] adnullemoji,String[] adsbemoji){
        ios5emoji = i5emj;
        ios4emoji = i4emj;
        androidnullemoji = adnullemoji;
        adsbuniemoji = adsbemoji;
    }
    
    //在ios上将ios5转换为ios4编码
    public static String transToIOS4emoji(String src) {
        return StringUtils.replaceEach(src, ios5emoji, ios4emoji);
    }
    //在ios上将ios4转换为ios5编码
    public static String transToIOS5emoji(String src) {
        return StringUtils.replaceEach(src, ios4emoji, ios5emoji);
    }
    //在android上将ios5的表情符替换为空
    public static String transToAndroidemojiNull(String src) {
        return StringUtils.replaceEach(src, ios5emoji, androidnullemoji);
    }
    
    //在android上将ios5的表情符替换为SBUNICODE
    public static String transToAndroidemojiSB(String src) {
        return StringUtils.replaceEach(src, ios5emoji, adsbuniemoji);
    }
    
    //在android上将SBUNICODE的表情符替换为ios5
    public static String transSBToIOS5emoji(String src) {
        return StringUtils.replaceEach(src, adsbuniemoji, ios5emoji);
    }
    
    //eg. param: 0xF0 0x9F 0x8F 0x80
    public static String hexstr2String(String hexstr) throws UnsupportedEncodingException{
        byte[] b = hexstr2bytes(hexstr);
        return new String(b, "UTF-8");
    }
    
    //eg. param: E018
    public static String sbunicode2utfString(String sbhexstr) throws UnsupportedEncodingException{
        byte[] b = sbunicode2utfbytes(sbhexstr);
        return new String(b, "UTF-8");
    }
    
    //eg. param: 0xF0 0x9F 0x8F 0x80
    public static byte[] hexstr2bytes(String hexstr){
        String[] hexstrs = hexstr.split(" ");
        byte[] b = new byte[hexstrs.length];
        
        for(int i=0;i<hexstrs.length;i++){
            b[i] = hexStringToByte(hexstrs[i].substring(2))[0];
        }
        return b;
    }
    
    //eg. param: E018
    public static byte[] sbunicode2utfbytes(String sbhexstr) throws UnsupportedEncodingException{
        int inthex = Integer.parseInt(sbhexstr, 16);
        char[] schar = {(char)inthex};
        byte[] b = (new String(schar)).getBytes("UTF-8");
        return b;
    }
    
    public static byte[] hexStringToByte(String hex) {
        int len = (hex.length() / 2);
        byte[] result = new byte[len];
        char[] achar = hex.toCharArray();
        for (int i = 0; i < len; i++) {
            int pos = i * 2;
            result[i] = (byte) (toByte(achar[pos]) << 4 | toByte(achar[pos + 1]));
        }
        return result;
    }


    private static byte toByte(char c) {
        byte b = (byte) "0123456789ABCDEF".indexOf(c);
        return b;
    }
    
    public static void main(String[] args) throws UnsupportedEncodingException {
        // TODO Auto-generated method stub
        byte[] b1 = {-30,-102,-67}; //ios5 //0xE2 0x9A 0xBD        
        byte[] b2 = {-18,-128,-104}; //ios4 //"E018"
        
        //-------------------------------------
        
        byte[] b3 = {-16,-97,-113,-128};    //0xF0 0x9F 0x8F 0x80        
        byte[] b4 = {-18,-112,-86};         //E42A    
        
        
        ios5emoji = new String[]{new String(b1,"utf-8"),new String(b3,"utf-8")};
        ios4emoji = new String[]{new String(b2,"utf-8"),new String(b4,"utf-8")};    
        
        
        //测试字符串
        byte[] testbytes = {105,111,115,-30,-102,-67,32,36,-18,-128,-104,32,36,-16,-97,-113,-128,32,36,-18,-112,-86};
        String tmpstr = new String(testbytes,"utf-8");
        System.out.println(tmpstr);
        
        
        //转成ios4的表情
        String ios4str = transToIOS5emoji(tmpstr);
        byte[] tmp = ios4str.getBytes();
        //System.out.print(new String(tmp,"utf-8"));        
        for(byte b:tmp){
            System.out.print(b);
            System.out.print(" ");
        }
    }
    
}