Emoji字符检查与替换

当文本包含Emoji字符的时候，存储到数据库或读取的时候需要进行编码和解码（如UTF_8），否则MySQL的存储可能有异常。

当有的文本不允许输入Emoji字符，或者显示时需要将Emoji替换为指定字符的时候可以用下面的几个工具方法。

/**
* 将字符串中的Emoji表情替换为*
* @param source
* @return
*/

public static String replaceEmojiToStar(String source){
String res = "";
if (Tools.isStrEmpty(source)) {
return res;
}
if(!containsEmoji(source)){
return source;
}else{
int len = source.length();
char[] dest = new char[len];
for (int i = 0; i < len; i++) {
char codePoint = source.charAt(i);
if (isNotEmojiCharacter(codePoint)) {
dest[i] = codePoint;
}else{
dest[i] = '*';
}
}
res = String.valueOf(dest);
}
return res;

}
/**
* 检测是否有emoji字符
*
* @param source
* @return 一旦含有就抛出
*/
public static boolean containsEmoji(String source) {
if (Tools.isStrEmpty(source)) {
return false;
}

int len = source.length();

for (int i = 0; i < len; i++) {
char codePoint = source.charAt(i);

if (!isNotEmojiCharacter(codePoint)) {
return true;
}
}

return false;
}

/**
* 判断是否是非Emoji字符之外的正常字符，正常字符返回true
* @param codePoint
* @return
*/

private static boolean isNotEmojiCharacter(char codePoint) {
return (codePoint == 0x0) ||
(codePoint == 0x9) ||
(codePoint == 0xA) ||
(codePoint == 0xD) ||
((codePoint >= 0x20) && (codePoint <= 0xD7FF)) ||
((codePoint >= 0xE000) && (codePoint <= 0xFFFD));
}