java打印byte数组,我怎么打印字节一个字节数组的内容？

I use encrypt(byte) code for input String and then save encrypt(String) in DB.

I get String encrypt from DB to decrypt it, but I need to cast String to byte without changing because decrypt get just byte.

I used s.getBytes(); but it changed it,

I need some code to cast string to byte without changing the String.

Thank you so much.

解决方案

getBytes() doesn't change the string, it encodes string into a sequence of bytes using the platform's default charset.

In order to print the array of bytes as a String value,

String s = new String(bytes);

Edit:

it seems as you want to print the string as bytes, for which you can use

Arrays.toString(bytes)

See this code,

String yourString = "This is an example text";

byte[] bytes = yourString.getBytes();

String decryptedString = new String(bytes);

System.out.println("Original String from bytes: " + decryptedString);

System.out.println("String represented as bytes : " + Arrays.toString(bytes));

Output,

Original String from bytes: This is an example text

String represented as bytes : [84, 104, 105, 115, 32, 105, 115, 32, 97, 110, 32, 101, 120, 97, 109, 112, 108, 101, 32, 116, 101, 120, 116]