java Byte[] to String(hex)

1. 字节数组转换成16进制字符展示

2.代码

package com.goodfan;

public class ByteArrayToString {

    private static char[] HEX_CHAR = {'0', '1', '2', '3', '4', '5', '6', '7', '8', 
        '9', 'a', 'b', 'c', 'd', 'e', 'f'};
    
    private static String byteArray2String(byte[] data){
        StringBuilder stringBuilder = new StringBuilder();
        for(int i=0; i<data.length; i++){
            stringBuilder.append(HEX_CHAR[(data[i] & 0xf0) >>> 4]);
            stringBuilder.append(HEX_CHAR[(data[i] & 0x0f)]);
            if(i < data.length-1)
                stringBuilder.append(" ");
        }
        return stringBuilder.toString();
    }
    
    public static void main(String[] args) {
        byte[] data = "hello kitty".getBytes();
        System.out.println(data);
        String byteArray2String = byteArray2String(data);
        System.out.println(byteArray2String);
    }
}