带前导零的二进制字符串问题 [英] binary string with leading zeros issue

问题描述

我有一个以二进制格式转换的字符串，但二进制转换方法删除了它的前导零，我不确定应该在开头添加多少前导零.这取决于字符串我的代码如下

I have a string which is converted in binary format but the binary conversion method removes it leading zero's and I am not sure how much leading zero's I should add in the start .It depends on the string my code is as follows

public static void encodeString(String str){
        byte[] bytes=str.getBytes();
        String binary = new BigInteger(bytes).toString(2);

    }

推荐答案

我了解您正在尝试保留输入 String 的每个字符的 8 位表示.为此，我使用了这种方法:

I understand that you are trying to preserve the 8-bits representation of each character of your input String. to do so, I used this method:

    public static String byteFormat(String src) {
    StringBuilder sb = new StringBuilder();

    for (int i = 0; i < src.length(); i++) {

        char chr = src.charAt(i);
        String format= String.format("%8s", Integer.toBinaryString(chr)).replace(' ', '0');
        sb.append(format);
    }
    return sb.toString();

}

我是这样测试的:

public static void main(String[] args) throws Exception {

    System.out.println(byteFormat("test"));
}

}

它输出:
01110100011001010111001101110100

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