利用socket实现python和java通信

python服务端

import socket
import threading
import json


def main():
    # 创建服务器套接字
    serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 获取本地主机名称
    host = "127.0.0.1"
    # 设置一个端口
    port = 12345
    # 将套接字与本地主机和端口绑定
    serversocket.bind((host, port))
    # 设置监听最大连接数
    serversocket.listen(10)
    conent = "hello "
    print("等待连接")
    while True:
        # 获取一个客户端连接
        clientsocket, addr = serversocket.accept()
        print("连接地址:%s" % str(addr))
        try:
            t = ServerThreading(model, clientsocket)  # 为每一个请求开启一个处理线程
            t.start()
        except Exception as identifier:
            print(identifier)
        pass
    serversocket.close()
    pass


class ServerThreading(threading.Thread):
    def __init__(self, model, clientsocket, recvsize=1024 * 1024, encoding="utf-8"):
        threading.Thread.__init__(self)
        self.model = model
        self._socket = clientsocket
        self._recvsize = recvsize
        self._encoding = encoding
        pass

    def run(self):
        print("开启线程.....")
        try:
            # 接受数据
            msg = ''
            while True:
                # 读取recvsize个字节
                rec = self._socket.recv(self._recvsize)
                # 解码
                msg += rec.decode(self._encoding)
                # 文本接受是否完毕，因为python socket不能自己判断接收数据是否完毕，
                # 所以需要自定义协议标志数据接受完毕
                if msg.strip().endswith('over'):
                    msg = msg[:-4]
                    break
            # 解析json格式的数据
            sendmsg = json.dumps(msg)
            print(sendmsg)
            # 发送数据
            self._socket.send(("%s" % sendmsg).encode(self._encoding))

        except Exception as identifier:
            self._socket.send("500".encode(self._encoding))
            print(identifier)
            pass
        finally:
            self._socket.close()
        print("任务结束.....")


if __name__ == "__main__":
    main()

java 客户端

package ww.learn;

import java.io.*;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;

public class test_client {
    private final String HOST = "127.0.0.1";
    private final int PORT = 12345;

    public List<Float> remoteCall(String path){
        // 访问服务进程的套接字
//        System.out.println("调用远程接口:host=>"+HOST+",port=>"+PORT);
        try(Socket socket = new Socket(HOST, PORT)) {
            // 初始化套接字，设置访问服务的主机和进程端口号，HOST是访问python进程的主机名称，可以是IP地址或者域名，PORT是python进程绑定的端口号
            // 获取输出流对象
            OutputStream os = socket.getOutputStream();
            PrintStream out = new PrintStream(os);
            // 发送内容
            out.print(path);
            // 告诉服务进程，内容发送完毕，可以开始处理
            out.print("over");


            // 获取服务进程的输入流
            InputStream is = socket.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is,"utf-8"));
            String tmp = null;
            StringBuilder sb = new StringBuilder();
            // 读取内容
            while((tmp=br.readLine())!=null)
                sb.append(tmp).append('\n');
            // 解析结果
            tmp = sb.toString().substring(1, sb.length()-2);
            String[] split = tmp.split(",");
            List<Float> list = new ArrayList<Float>(split.length);
            for (int i = 0; i < split.length; i++) {
                list.add(Float.valueOf(split[i]));
                split[i] = null;
            }
//            System.out.println(list);
//            System.out.println(list.size());
            return list;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) throws IOException {
        test_client test_client = new test_client();
        List<Float> feature = test_client.remoteCall("1.jpeg");
        System.out.println(feature);

    }

}