package com.freud;

import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

/**
 * 
 * @author Freud Kang
 *
 */
public class Test0X06 {

	public static void main(String[] args) throws Exception {

		Socket socket = null;

		OutputStream os = null;
		InputStream is = null;

		try {
			socket = new Socket("localhost", 502);
			os = socket.getOutputStream();
			is = socket.getInputStream();
			String request = "000100000006010600010064";
			System.out.println("Request  : " + request);
			os.write(hexStrToBytes(request));
			Thread.sleep(100);
			byte[] buffer = new byte[is.available()];
			is.read(buffer);
			String result = bytes2HexString(buffer);
			System.out.println("response : " + result);
		} finally {
			if (is != null) {
				is.close();
			}
			if (os != null) {
				os.flush();
				os.close();
			}
			if (socket != null) {
				socket.close();
			}
		}
	}

	public static byte[] hexStrToBytes(String hexStr) {
		if (hexStr.length() % 2 != 0) {
			throw new IllegalArgumentException("十六进制的字符串长度必须是2的倍数!");
		}
		byte[] ret = new byte[hexStr.length() / 2];
		for (int i = 0; i < hexStr.length(); i = i + 2) {
			ret[i / 2] = (byte) Integer.parseInt(hexStr.substring(i, i + 2), 16);
		}
		return ret;
	}

	public static String bytes2HexString(byte[] src) {
		StringBuilder stringBuilder = new StringBuilder();
		if (src == null || src.length <= 0) {
			return null;
		}
		for (int i = 0; i < src.length; i++) {
			int v = src[i] & 0xFF;
			String hv = Integer.toHexString(v).toUpperCase();
			if (hv.length() < 2) {
				stringBuilder.append(0);
			}
			stringBuilder.append(hv);
		}
		return stringBuilder.toString();
	}
}

/**
 * Request  : 000100000006010600010064
 * response : 000100000006010600010064
 */