Java Socket通信实现文件传输/图片传输

来源：互联网发布：目前java主流开发框架编辑：程序博客网时间：2024/04/30 15:43

这只是一个简单的Demo，实际应用时，可能还需要先将文件名或者文件的后缀名传给接收方，这个难度不大，大家可自行添加

发送端ClientTcpSend.java:

import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.net.InetSocketAddress;import java.net.Socket;public class ClientTcpSend {    public static void main(String[] args) {        int length = 0;        byte[] sendBytes = null;        Socket socket = null;        DataOutputStream dos = null;        FileInputStream fis = null;        try {            try {                socket = new Socket();                socket.connect(new InetSocketAddress("127.0.0.1", 33456),                        10 * 1000);                dos = new DataOutputStream(socket.getOutputStream());                File file = new File("C:\\Users\\JP\\Pictures\\head.jpg");                fis = new FileInputStream(file);                sendBytes = new byte[1024];                while ((length = fis.read(sendBytes, 0, sendBytes.length)) > 0) {                    dos.write(sendBytes, 0, length);                    dos.flush();                }            } finally {                if (dos != null)                    dos.close();                if (fis != null)                    fis.close();                if (socket != null)                    socket.close();            }        } catch (Exception e) {            e.printStackTrace();        }    }}

接收端ServerTcpListener.java：

import java.net.*;import java.io.*;public class ServerTcpListener implements Runnable {    public static void main(String[] args) {        try {            final ServerSocket server = new ServerSocket(33456);            Thread th = new Thread(new Runnable() {                public void run() {                    while (true) {                        try {                            System.out.println("开始监听...");                            Socket socket = server.accept();                            System.out.println("有链接");                            receiveFile(socket);                        } catch (Exception e) {                        }                    }                }            });            th.run(); //启动线程运行        } catch (Exception e) {            e.printStackTrace();        }    }    public void run() {    }    public static void receiveFile(Socket socket) {        byte[] inputByte = null;        int length = 0;        DataInputStream dis = null;        FileOutputStream fos = null;        try {            try {                dis = new DataInputStream(socket.getInputStream());                fos = new FileOutputStream(new File("d:/cc.jpg"));                inputByte = new byte[1024];                System.out.println("开始接收数据...");                while ((length = dis.read(inputByte, 0, inputByte.length)) > 0) {                    System.out.println(length);                    fos.write(inputByte, 0, length);                    fos.flush();                }                System.out.println("完成接收");            } finally {                if (fos != null)                    fos.close();                if (dis != null)                    dis.close();                if (socket != null)                    socket.close();            }        } catch (Exception e) {        }    }}

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