Java Socket file transmission

Import java. io. dataOutputStream; import java. io. file; import java. io. fileInputStream; import java. io. IOException; import java.net. inetSocketAddress; import java.net. socket; /*** File Sending client main program * @ author admin_Hzw **/public class BxClient {/*** main method of the Program * @ param args * @ throws IOException */public static void main (String [] args) throws IOException {int length = 0; double sumL = 0; byte [] sendByt Es = null; Socket socket = null; DataOutputStream dos = null; FileInputStream FCM = null; boolean bool = false; try {File file = new File ("D:/day. Zip "); // The file path to be transmitted long l = file. length (); socket = new Socket (); socket. connect (new InetSocketAddress ("127.0.0.1", 48123); dos = new DataOutputStream (socket. getOutputStream (); FCM = new FileInputStream (file); sendBytes = new byte [1024]; while (length = Fiis. read (sendBytes, 0, sendBytes. length)> 0) {sumL + = length; System. out. println ("transmitted:" + (sumL/l) * 100) + "%"); dos. write (sendBytes, 0, length); dos. flush ();} // although the data types are different, JAVA will automatically convert to the same data type and then compare if (sumL = l) {bool = true ;}} catch (Exception e) {System. out. println ("client file transmission exception"); bool = false; e. printStackTrace ();} finally {if (dos! = Null) dos. close (); if (FS! = Null) FCM. close (); if (socket! = Null) socket. close ();} System. out. println (bool? "Successful": "failed") ;}} server: [java] import java. io. dataInputStream; import java. io. file; import java. io. fileOutputStream; import java. io. IOException; import java.net. serverSocket; import java.net. socket; import java. util. random; import com. boxun. util. getDate; /*** receive file service ** @ author admin_Hzw **/public class BxServerSocket {/*** Project main method * @ param args */public static void main (String [] args) {try {fin Al ServerSocket server = new ServerSocket (48123); Thread th = new Thread (new Runnable () {public void run () {while (true) {try {System. out. println ("Start listening... ");/** if it is not accessed, it will automatically wait */Socket socket = server. accept (); System. out. println ("linked"); receiveFile (socket);} catch (Exception e) {System. out. println ("server exception"); e. printStackTrace () ;}}}); th. run (); // start the thread to run} catch (Exception e) {e. printSt AckTrace () ;}} public void run () {}/ *** Method for receiving files * @ param socket * @ throws IOException */public static void receiveFile (Socket socket) throws IOException {byte [] inputByte = null; int length = 0; DataInputStream dis = null; FileOutputStream fos = null; String filePath = "D:/temp/" + GetDate. getDate () + "SJ" + new Random (). nextInt (10000) + ". zip "; try {dis = new DataInputStream (socket. getInputSt Ream (); File f = new File ("D:/temp"); if (! F. exists () {f. mkdir ();}/** File storage location */fos = new FileOutputStream (new File (filePath); inputByte = new byte [1024]; System. out. println ("start to receive data... "); while (length = dis. read (inputByte, 0, inputByte. length)> 0) {fos. write (inputByte, 0, length); fos. flush ();} System. out. println ("completed receipt:" + filePath);} finally {if (fos! = Null) fos. close (); if (dis! = Null) dis. close (); if (socket! = Null) socket. close () ;}} catch (Exception e) {e. printStackTrace () ;}} time tool class: [java] import java. text. simpleDateFormat; import java. util. date; /*** time tool class ** @ author admin_Hzw **/public class GetDate {/*** time format to millisecond */private static SimpleDateFormat df = new SimpleDateFormat ("yyyyMMddHHmmssSSS "); public static String getDate () {return df. format (new Date ());}}