Encode/Decode E language text

elang.java

import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;

import com.google.common.io.BaseEncoding;

public class Test {

    public static void main(String[] args) {
        String string = "3C 21 20 45 6E 74 69 74 79 3D 44 54 48 53 54 20 74 79 70 65 3D 4E 54 43 20 74 69 6D 65 3D 27 32 30 31 33 2D 30 39 2D 32 33 20 31 36 3A 31 38 3A 32 39 27 20 21 3E 0A 3C 6E 74 63 3A 3A 44 54 48 53 54 3E 0A 40 CD A8 D6 AA B1 E0 BA C5 20 20 20 20 20 20 20 20 CD A8 D6 AA C4 DA C8 DD 0A 23 31 33 37 39 39 35 33 31 30 39 20 20 20 20 20 20 20 20 41 47 43 B2 E2 CA D4 A3 A1 0A 3C 2F 6E 74 63 3A 3A 44 54 48 53 54 3E 0A";

        String test3 = "<! Entity=JNSD_ type=NTC time='2013-10-10 15:47:58' !>\n"
                       + "<ntc::JNSD_>\n"
                       + "@通知编号        通知内容\n"
                       + "#1381420078        各场登录nmdtzx＠163.com邮箱（密码000000）下载《2013年第二期发电厂值长持证上岗培训班》的通知，并按要求回复！具体内容见通知要求。\n"
                       + "</ntc::JNSD_>\n";
        try {
            System.out.println(new String(toByteArray(string.trim()), "GBK"));

            Charset gbk = Charset.forName("GBK");
            System.out.println(toHexString(test3.getBytes(gbk)));
        }
        catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }

    public static String toHexString(byte[] array) {
        return BaseEncoding.base16().withSeparator(" ", 2).encode(array);
    }

    public static byte[] toByteArray(String s) {
        return BaseEncoding.base16().withSeparator(" ", 2).decode(s);
    }
}