过滤表情获取过滤后的字符长度（通过正则表达式）

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/bcqd1211/article/details/71520621

import java.util.regex.Pattern;

/**
 * Created by Basil on 2017/5/10 13:00 
 */
public class GetInputContentLengh {
    //加入白名单
    public static final String rex = "(\\[呵呵\\])|(\\[其他表情\\])";

    public int getLengh(String input){
        int count = 0;
        //去除空格
        input = input.trim().replace(" ", "");
        Pattern pattern = Pattern.compile(rex);
        String[] result = pattern.split(input);
        Matcher matcher = pattern.matcher(input);
        //表情字符出现的次数
        int faceCount= 0;
        while(matcher.find()){
            //循环输出所有的表情符号
            String faceContent=matcher.group(0);
            System.out.println("第"+faceCount+"个表情是"+faceContent);
            //每匹配到一个表情则计数器加1
            faceCount++;
        }
        for (int i = 0; i < result.length; i++) {
            count = count + result[i].length();
        }
        Integer length= count+faceCount;
        //把表情计算成1个字符时输入的长度
        System.out.println("长度：" + length);
        return length;
    }
}