Java之哈夫曼压缩原理案例讲解

public static void main(String[] args) {
        String beforeStr = "JavaJavaJavaJavaJavaJava";
        StringBuilder afterStr = new StringBuilder("");
//        把字符串的每一个字符的ASCII码转换为二进制存储起来
        for (int i = 0; i < beforeStr.length(); i++) {
            afterStr.append(binaryToDecimal((int) beforeStr.charAt(i)));
        }
        System.out.println(beforeStr + "\n 在计算内是这样存储的: \n" + afterStr);
        System.out.println("afterStr.length = " + afterStr.length());
    }

    //     十进制转换位二进制的算法
    public static String binaryToDecimal(int n) {
        StringBuilder str = new StringBuilder();
        while (n != 0) {
            str.insert(0, n % 2);
            n = n / 2;
        }
//        不满8位前面补0
        while (str.length() < 8) {
            str.insert(0, '0');
        }
        return str.toString();
    }