微信暱稱emoj表情保存到mysql數據庫時報錯怎麼解決？

把數據庫升級，用mysql5.5以上的。字符集改爲utf8mb4 -- UTF-8 

第二種方法就是將表情進行過濾：

package chan.ye.dai.utils;

import org.apache.commons.lang.StringUtils;

public class EmojiFilter {
	 
    /**
     * 檢測是否有emoji字符
     * @param source
     * @return 一旦含有就拋出
     */
    public static boolean containsEmoji(String source) {
        if (StringUtils.isBlank(source)) {
            return false;
        }
 
        int len = source.length();
 
        for (int i = 0; i < len; i++) {
            char codePoint = source.charAt(i);
 
            if (isEmojiCharacter(codePoint)) {
                //do nothing，判斷到了這裏代表，確認有表情字符
                return true;
            }
        }
 
        return false;
    }
 
    private static boolean isEmojiCharacter(char codePoint) {
        return (codePoint == 0x0) ||
                (codePoint == 0x9) ||
                (codePoint == 0xA) ||
                (codePoint == 0xD) ||
                ((codePoint >= 0x20) && (codePoint <= 0xD7FF)) ||
                ((codePoint >= 0xE000) && (codePoint <= 0xFFFD)) ||
                ((codePoint >= 0x10000) && (codePoint <= 0x10FFFF));
    }
 
    /**
     * 過濾emoji 或者 其餘非文字類型的字符
     * @param source
     * @return
     */
    public static String filterEmoji(String source) {
 
        if (!containsEmoji(source)) {
            return source;//若是不包含，直接返回
        }
        //到這裏鐵定包含
        StringBuilder buf = null;
 
        int len = source.length();
 
        for (int i = 0; i < len; i++) {
            char codePoint = source.charAt(i);
 
            if (isEmojiCharacter(codePoint)) {
                if (buf == null) {
                    buf = new StringBuilder(source.length());
                }
                buf.append(codePoint);
            } else {
            }
        }
 
        if (buf == null) {
            return source;//若是沒有找到 emoji表情，則返回源字符串
        } else {
            if (buf.length() == len) {//這裏的意義在於儘量少的toString，由於會從新生成字符串
                buf = null;
                return source;
            } else {
                return buf.toString();
            }
        }
    }
}