实现图片的传输问题。为什么代码运行到一半就停止了？请高手看看
//实现图片的传输
/*
*
*服务器端
*
*/
package server;
import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class ServerTest {
int port = 8821;
void start() {
Socket s = null;
try {
ServerSocket ss = new ServerSocket(port);
while (true) {
// 选择进行传输的文件
String filePath = "F:\\123.jpg";
File fi = new File(filePath);
System.out.println("文件长度:" + (int) fi.length());
// public Socket accept() throws
// IOException侦听并接受到此套接字的连接。此方法在进行连接之前一直阻塞。
s = ss.accept();
System.out.println("建立socket链接");
DataInputStream dis = new DataInputStream(
new BufferedInputStream(s.getInputStream()));
dis.readByte();
DataInputStream fis = new DataInputStream(
new BufferedInputStream(new FileInputStream(filePath)));
DataOutputStream ps = new DataOutputStream(s.getOutputStream());
// 将文件名及长度传给客户端。这里要真正适用所有平台，例如中文名的处理，还需要加工，具体可以参见Think In Java
// 4th里有现成的代码。
ps.writeUTF(fi.getName());
ps.flush();
ps.writeLong((long) fi.length());
ps.flush();
int bufferSize = 10240;
byte[] buf = new byte[bufferSize];
while (true) {
int read = 0;
if (fis != null) {
read = fis.read(buf);
}
if (read == -1) {
break;
}
ps.write(buf, 0, read);
}
ps.flush();
// 注意关闭socket链接哦，不然客户端会等待server的数据过来，
// 直到socket超时，导致数据不完整。
fis.close();
s.close();
System.out.println("文件传输完成");
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String arg[]) {
new ServerTest().start();
}
}
/*
*
*客户端
*/
package client;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
public class Client {
private static String ip = "localhost";// 设置成服务器IP
private static int port = 8821;
private String sendMessage = "";
private static Socket socket = null;
private static DataOutputStream out = null;
private static DataInputStream getMessageStream = null;
public static void CreateConnection() throws Exception {
try {
socket = new Socket(ip, port);
} catch (Exception e) {
e.printStackTrace();
if (socket != null)
socket.close();
throw e;
} finally {
}
}
public Client() {
try {
if (createConnection()) {
sendMessage();
getMessage();
}
} catch (Exception ex) {
ex.printStackTrace();
}finally{
shutDownConnection();
}
}
private boolean createConnection() throws UnknownHostException, IOException {
socket = new Socket(ip, port);
try {
CreateConnection();
System.out.print("连接服务器成功!" + "\n");
return true;
} catch (Exception e) {
System.out.print("连接服务器失败!" + "\n");
return false;
}
}
public static void sendMessage(String sendMessage) throws Exception {
try {
out = new DataOutputStream(socket.getOutputStream());
out.writeUTF(sendMessage);
out.flush();
} catch (Exception e) {
e.printStackTrace();
if (out != null)
out.close();
throw e;
} finally {
}
}
public DataInputStream getMessageStream() throws Exception {
try {
getMessageStream = new DataInputStream(new BufferedInputStream(
socket.getInputStream()));
return getMessageStream;
} catch (Exception e) {
e.printStackTrace();
if (getMessageStream != null)
getMessageStream.close();
throw e;
} finally {
}
}
private void sendMessage() {
try {
sendMessage(sendMessage);
} catch (Exception e) {
System.out.print("发送消息失败!" + "\n");
}
}
private void getMessage() {
DataInputStream inputStream = null;
try {
inputStream = getMessageStream();
} catch (Exception e) {
System.out.print("接收消息缓存错误\n");
return;
}
try {
// 本地保存路径，文件名会自动从服务器端继承而来。
String savePath = "D:\\update\\";
int bufferSize = 10240;
byte[] buf = new byte[bufferSize];
int passedlen = 0;
long len = 0;
savePath += inputStream.readUTF();
DataOutputStream fileOut = new DataOutputStream(
new BufferedOutputStream(new BufferedOutputStream(
new FileOutputStream(savePath))));
len = inputStream.readLong();
System.out.println("文件的长度为:" + len + "\n");
System.out.println("开始接收文件!" + "\n");
while (true) {
int read = 0;
if (inputStream != null) {
read = inputStream.read(buf);
}
passedlen += read;
if (read == -1) {
break;
}
System.out.println("文件接收了" + (passedlen * 100 / len) + "%\n");
fileOut.write(buf, 0, read);
}
System.out.println("接收完成，文件存为" + savePath + "\n");
fileOut.close();
} catch (Exception e) {
System.out.println("接收消息错误" + "\n");
return;
}
}
public static void shutDownConnection() {
try {
if (out != null)
out.close();
if (getMessageStream != null)
getMessageStream.close();
if (socket != null)
socket.close();
} catch (Exception e) {
}
}
public static void main(String arg[]) {
new Client();
}
}
[解决办法]
大概瞅了一眼
问题:客户端还没有接收完毕,服务器端就把scoket关闭了，所以导致数据不完整
对策：服务器端不主动关闭scoket，客户端接收完数据以后，由客户端关闭scoket，什么时候算接收完毕，要自己控制好，比如文件长度比较，或者服务器端发送个“送完”标志，客户端收到“送完”标志才关闭socket
[解决办法]