JAVA 跨机器文件复制的二种技巧

发布时间：2021-11-30 12:54:40 所属栏目：教程来源：互联网

导读：1.直接用SOCKET实现 server端： package com.taobao.terminator.allen.shellTest; import Java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import

1.直接用SOCKET实现

server端：

package com.taobao.terminator.allen.shellTest;
import Java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
public class EcrmFileServerAllen {
    private final static int port = 18110;
    private final static int SIZE = 8192;
    private String basePath = "/home/admin/allen/file";
// private String basePath = "d:/test";
    private void send(){
        /**
         * 1.发送FileList
         * 2.接收FileName
         * 3.传递stream
         * 4.接收end，结束传递
         */
        ServerSocket server = null;
        Socket socket = null;
        DataInputStream fileIn = null;
        DataOutputStream out = null;
        DataInputStream in =null;

        try {
            server = new ServerSocket(port);
            File files = new File(basePath);
            socket = server.accept();
            out = new DataOutputStream(socket.getOutputStream());
            in = new DataInputStream(socket.getInputStream());

            StringBuilder builder = new StringBuilder();
            for(String s : files.list()){
                builder.append(s);
                builder.append(",");
            }

            System.out.println("------------send file------------");
            out.writeUTF(builder.toString());
            out.flush();

            while(true){
                    System.out.println("------------begin read file------------");
                    String fileName = in.readUTF();
                    System.out.println("read file : " + fileName);
                    if("EOF".equals(fileName)){
                        System.out.println(fileName + "file send over ,thanks");
                        break;
                    }
                    File file = constuctNewFile(files.getAbsolutePath(),fileName);
                    fileIn = new DataInputStream(new FileInputStream(file));
                    System.out.println("the file: " + fileName + "length is " + file.length());
                    out.writeLong(file.length());
                    out.flush();

                    byte[] buffer = new byte[SIZE];
                    while(true){
                        int read = 0;
                        if(fileIn != null){
                            read = fileIn.read(buffer);
                        }
                        if ( read != -1){
                            out.write(buffer, 0, read);
                        } else {
                            break;
                        }
                    }

                    System.out.println("Write file over: " + fileName);
                    out.flush();
                    fileIn.close();
                    fileIn = null;
            }
            System.out.println("All is over");
        } catch (IOException e) {
            throw new RuntimeException("IO传输异常",e);
        } finally{
            try {
                out.close();
                socket.close();
                server.close();
            } catch (IOException e) {
                throw new RuntimeException("IO关闭异常",e);
            }
        }
    }

    private File constuctNewFile(String filePath , String fileName){
        fileName = filePath + File.separator + fileName;
        return new File(fileName);
    }


    public static void main(String arg[]) {
        PrintStream myout = null;
        try {
            myout = new PrintStream(new FileOutputStream(new File("/home/admin/main.log")));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        System.setOut(myout);
        System.setErr(myout);
        new EcrmFileServerAllen().send();
    }
}

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