Python与Java间Socket通信

　　之前做过一款Java的通讯工具,有发消息发文件等基本功能.可大家也都知道Java写的界面无论是AWT或Swing,那简直不是人看的,对于我们这些开发人员还好,如果是Release出去给用户看,那必须被鄙视到底.用C++的话,写的代码也是非常多的(QT这方面做得很好!),但我这里改用Python,以便到时用wxPython做界面.而且这两者跨平台也做得非常好.

　　这里只给出核心实现以及思路

　　Server(Java)接收从Clinet(Python)发送来的文件

　　JServer.java

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class JServer implements Runnable {

ServerSocket ss;

public JServer() throws Exception {
ss = new ServerSocket(8086);
new Thread(this).start();
}

@Override
public void run() {
int i = 0;
System.out.println("server startup.");
while (true) {
try {
Socket s = ss.accept();
// 每个客户端一个处理线程
new Handler(s, i).start();
i++;
} catch (IOException e) {
e.printStackTrace();
}
}

}

public static void main(String[] args) {
try {
new JServer();
} catch (Exception e) {
e.printStackTrace();
}
}

}

class Handler extends Thread {
Socket s;
int id;

public Handler(Socket s, int id) {
this.s = s;
this.id = id;
}

@Override
public void run() {
System.out.println("in handling..");

FileOutputStream fos = null;
try {
InputStream is = s.getInputStream();
BufferedReader in = new BufferedReader(new InputStreamReader(is));
// 从客户端读取发送过来的文件名
String filename = in.readLine();
System.out.println("read line " + id + " :" + filename);
File file = new File(filename);

int len = 0;
int BUFSIZE = 4*1024;
byte[] by = new byte[BUFSIZE * 1024];
fos = new FileOutputStream(file);
while ((len = is.read(by, 0, BUFSIZE)) != -1) {
fos.write(by, 0, len);
fos.flush();
}
System.out.println("done.");
} catch (Exception e) {
e.printStackTrace();
} finally {
// 服务端就不要手贱 关了socket否则Python 会出现错误Errno 10054让客户端关掉就行啦
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

　　Python客户端

# -*- coding: utf-8 -*-
#!/usr/bin/python
#coding=utf-8
import time
import threading
import socket
import os

class Client():
def __init__(self):
address = ('127.0.0.1', 8086)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(address)
fn = 'test.zip'
ff = os.path.normcase(fn)

try:
f = open(fn, 'rb')
sendFile = SendFile(s,f)
sendFile.start()
print 'start to send file.'
except IOError:
print 'open err'

class SendFile(threading.Thread):
def __init__(self, sock, file):
threading.Thread.__init__(self)
self.file = file
self.sock = sock

def run(self):
print self.file
BUFSIZE = 1024
count = 0
name = self.file.name+'\r'
　　　　　　　　　# 前1k字节是为了给服务端发送文件名 一定要加上'\r',不然服务端就不能readline了
for i in range(1, BUFSIZE - len(self.filename) -1):
name += '?'
print name
self.sock.send(name)
while True:
print BUFSIZE
fdata = self.file.read(BUFSIZE)
if not fdata:
print 'no data.'
break
self.sock.send(fdata)
count += 1
if len(fdata) != BUFSIZE:
print 'count:'+str(count)
print len(fdata)
nRead = len(fdata)

print 'send file finished.'
self.file.close()
self.sock.close()
print 'close socket'

c = Client()