java使用rmi传输大文件示例分享

package rmiupload;

    import java.io.BufferedInputStream;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.net.MalformedURLException;
    import java.rmi.Naming;
    import java.rmi.NotBoundException;
    import java.rmi.RemoteException;

    public class FileClient {

        public FileClient() {
            // TODO Auto-generated constructor stub
        }

        public static void main(String[] args) {
            try {
                FileDataService fileDataService = (FileDataService) Naming.lookup("rmi://localhost:9001/FileDataService");
                fileDataService.upload("/Users/NeverDie/Documents/test.mp4", new FileClient().fileToByte("/Users/NeverDie/Music/test.mp4"));
            } catch (MalformedURLException | RemoteException | NotBoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    //这个方法比较重要，通过这个方法把一个名为filename的文件转化为一个byte数组
        private byte[] fileToByte(String filename){
            byte[] b = null;
            try {
                File file = new File(filename);
                b = new byte[(int) file.length()];
                BufferedInputStream is = new BufferedInputStream(new FileInputStream(file));
                is.read(b);
            } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return b;
        }
    }
FileDataService

package rmiupload;

    import java.net.URL;
    import java.rmi.Remote;
    import java.rmi.RemoteException;

    public interface FileDataService extends Remote{

        //这里的filename应该是该文件存放在服务器端的地址
        public void upload(String filename, byte[] file) throws RemoteException;

    }

package rmiupload;

    import java.io.BufferedOutputStream;
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.net.URL;
    import java.rmi.RemoteException;
    import java.rmi.server.RMIClientSocketFactory;
    import java.rmi.server.RMIServerSocketFactory;
    import java.rmi.server.UnicastRemoteObject;

    public class FileDataService_imp extends UnicastRemoteObject implements FileDataService{

        public FileDataService_imp() throws RemoteException {

        }

        @Override
        public void upload(String filename, byte[] fileContent) throws RemoteException{
            File file = new File(filename);
            try {
                if (!file.exists())
                    file.createNewFile();
                BufferedOutputStream os = new BufferedOutputStream(new FileOutputStream(file));
                os.write(fileContent);
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

    ;   }

    }

package rmiupload;

    import java.net.MalformedURLException;
    import java.rmi.Naming;
    import java.rmi.RemoteException;
    import java.rmi.registry.LocateRegistry;

    public class FileServer {

        FileDataService fileDataService;

        public FileServer() {
            try {
                fileDataService = new FileDataService_imp();
                LocateRegistry.createRegistry(9001);
                Naming.rebind("rmi://localhost:9001/FileDataService", fileDataService);
            } catch (RemoteException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

     
        }

        /**
         * @param args
         */
        public static void main(String[] args) {
            new FileServer();

        }

    }