我有一个名为byteArr[]
的字节数组。我需要从中删除前4个字节。我的代码如下所示。在这里,我使用字节数组来存储输入字符串。输出结果中有一些不必要的字节,即前四个字节不需要,从第五个字节开始是正确的。我的程序是使用RFID机器从相应的RFID标签中获取ID。
public class Serverc {
final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
public static String bytesToHex(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
for (int j = 0; j < bytes.length; j++) {
int v = bytes[j] & 0xFF;
hexChars[j * 2] = hexArray[v >>> 4];
hexChars[j * 2 + 1] = hexArray[v & 0x0F];
}
return new String(hexChars);
}
public static void connection() throws IOException {
ServerSocket ss = new ServerSocket(9888);//exce
ss.setSoTimeout(300000000);//exce
System.out.println("Waiting for client on port " + ss.getLocalPort() + "...");
while (true) {
Socket server = ss.accept();//exce
System.out.println("Just connected to " + server.getRemoteSocketAddress());
int available = 0;
DataInputStream in = new DataInputStream(server.getInputStream());//exce
int input = 0;
//BufferedReader br = new BufferedReader(in);
byte byteArr[] = new byte[28];
try {
//read till the end of stream
//while((input = in.available()) != -1)
while ((input = in.read(byteArr)) != -1) {
System.out.println("Size read is " + input);
System.out.println("Data is " + bytesToHex(byteArr));
}
//System.out.println("inside finally");
server.close();//exce
//System.out.println("outside finally");
} catch (SocketTimeoutException ex) {
System.out.println("Socket timed out!");
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public static void main(String args[]) throws IOException {
Serverc obj = new Serverc();
obj.connection();
}
}
这是我的控制台。
Waiting for client on port 9888...
Just connected to /106.208.71.50:61532
Size read is 28
Data is 55000016910001DB00FB63ABEEAFC1EC888F10263410050711148F3500000000
Size read is 28
Data is 55000016910001DB00FB63ABEEAFC1EC888F10263410050711148F3500000000
Size read is 28
Data is 55000016910001DB00FB63ABEEAFC1EC888F10263410050711148F3500000000
Size read is 28
Data is 55000016910001DB00FB63ABEEAFC1EC888F10263410050711148F3500000000
Size read is 28
Data is 55000016910001DB00FB63ABEEAFC1EC888F10263410050711148F3500000000
我需要将结果中的55000016删除。
提前感谢。