Question

问题在于代码中的评论，我认为这是一种更容易提问的方法......

简单的问题，但我似乎无法找到答案。我想将String转换为byte[]（简单，String.getBytes()）。然后我想将一个字节串（例如101011010101001）转换为byte []并获取它的String值（这也很简单：new String(byte[])）

这是我到目前为止所得到的：

Scanner scan = new Scanner(System.in);
String string = scan.nextLine();
String byteString = "";
for (byte b : string.getBytes()) {
  byteString += b;
}
System.out.println(byteString);

//This isn't exactly how it works, these two parts in separate methods, but you get the idea...

String byteString = scan.nextLine();
byte[] bytes = byteString.literalToBytes() //<== or something like that...
//The line above is pretty much all I need...
String string = new String(bytes);
System.out.println(string);

Answer 1

修改

请参阅this答案以获取解决方案。

有了这个你可以：

String string = scan.nextLine(); String convertByte = convertByte(string.getBytes()); System.out.println(convertByte); String byteString = scan.nextLine(); System.out.println(new String(convertStr(byteString)));

Answer 2

这不起作用。问题是，当您将字节转换为字符串时，您将获得类似

的字符串

2532611134

所以分析这个字符串，是第一个字节2，或25，还是253？

使这项工作的唯一方法是使用DecimalFormat并确保字符串中的每个字节长度为3个字符

Answer 3

好吧，因为commenter pointed me到this question（导致我this answer）的{{3}}不会回答，我会在这里发布解决方案：

Scanner scan = new Scanner(System.in);
String pass = scan.nextLine();
StringBuilder byteString = new StringBuilder();
for (byte b : pass.getBytes()) {
  b = (byte) (b);
  byteString.append(b).append(","); //appending that comma is what does the trick.
}
System.out.println(byteString);
//
String[] split = byteString.toString().split(","); //splitting by that comma is what does the trick... too...
byte[] bytes = new byte[split.length];
for (int i = 0; i < split.length; i++) {
  bytes[i] = (byte) (Byte.valueOf(split[i]).byteValue());
}
System.out.println(new String(bytes));

Answer 4

我猜你想要的是这个

// to get back the string from byte array
StringBuilder byteString = new StringBuilder();
for (byte b : string.getBytes()) {
    byteString.append((char)b);
}
   System.out.println(byteString.toString());
// to get the binary representation from string
StringBuilder byteString = new StringBuilder();
    for (byte b : string.getBytes()) {
        System.out.print(Integer.toBinaryString((int)b));
    }
        System.out.println(byteString.toString());

字符串到字符串的字符串

4 个答案: