1.客户端代码

public class UploadPicClient { public static void main(String[] args) throws UnknownHostException, IOException { // TODO Auto-generated method stub //1,创建客户端socket Socket s = new Socket("localhost",10088); //2,读取客户端要上传的图片文件 FileInputStream fis = new FileInputStream("D:\\workspace\\day2019.1.17\\lanjing.jpg"); //3,获取Socket输出流，将读到的图片的数据发送到服务端 OutputStream out = s.getOutputStream(); byte[] buf = new byte[1021]; int len =0; while((len=fis.read(buf))!=-1){ out.write(buf,0,len); } //告诉服务端说：这边的数据发送完毕让服务端停止读取 s.shutdownOutput(); //读取服务端发回的内容 InputStream in = s.getInputStream(); byte[] bufIn = new byte[1024]; int lenIn = in.read(buf); String text = new String (buf,0,lenIn); System.out.println(text); //关闭资源 fis.close(); s.close(); }}

2.服务端代码

public class UploadPicSever {public static void main(String[] args) throws IOException { // TODO Auto-generated method stub //创建tcp的socket服务端 ServerSocket ss = new ServerSocket(10088); //获取客户端 Socket s = ss.accept(); String ip = s.getInetAddress().getHostAddress(); System.out.println(ip+".....connected"); //读取客户端发来的数据 InputStream in = s.getInputStream(); //将读取到的数据存储到一个文件中。 File dir = new File("D:\\workspace\\day2019.1.17"); if(!dir.exists()){ dir.mkdirs(); } File file = new File(dir,"blue.jpg"); FileOutputStream fos = new FileOutputStream(file); byte[] buf = new byte[1024]; int len = 0; while ((len=in.read(buf))!=-1){ fos.write(buf,0,len); } //获取socket输出流，将上传成功字样发送给客户端 OutputStream out = s.getOutputStream(); out.write("上传成功".getBytes()); fos.close(); s.close(); ss.close();}

上传后和上传前的图片：

总结

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