EBCDIC用Java解包comp-3数据返回40404**

import org.apache.commons.codec.Charsets;
import org.apache.commons.codec.binary.Hex;
import org.apache.commons.codec.binary.StringUtils;

public class EBCDICUtil {
    public static String unpackComp3(byte[] data) {
        StringBuilder result = new StringBuilder();
        int length = data.length;
        for (int i = 0; i < length; i++) {
            byte b = data[i];
            int digit1 = (b & 0xF0) >> 4;
            int digit2 = b & 0x0F;
            if (digit1 != 0x0F) {
                result.append(digit1);
            }
            if (digit2 != 0x0F) {
                result.append(digit2);
            }
        }
        return result.toString();
    }

    public static void main(String[] args) {
        String hexData = "40404F";
        byte[] data = Hex.decodeHex(hexData.toCharArray());
        String unpackedData = unpackComp3(data);
        String decodedData = StringUtils.newString(data, Charsets.ISO_8859_1);
        System.out.println("Unpacked Data: " + unpackedData);
        System.out.println("Decoded Data: " + decodedData);
    }
}