java实现两台服务器间文件复制的方法

实现两台服务器间文件复制，需要通过网络传输文件。下面我将简单介绍一下Java实现文件复制的方法与实现步骤。

步骤

步骤一：建立Socket套接字

通过Socket对象建立连接，用于发送数据。

Socket socket = new Socket(InetAddress.getByName(IP), port);

其中，IP为目标服务器的具体IP地址，port为目标服务器的端口号。

步骤二：建立文件输入输出流

通过FileInputStream将本地文件读入内存，然后通过OutputStream将文件数据发送到目标服务器上。具体实现可以参考以下代码示例：

File file = new File("src/file.txt");
FileInputStream fis = new FileInputStream(file);
OutputStream os = socket.getOutputStream();
byte[] buffer = new byte[1024];
int length;
while ((length = fis.read(buffer)) != -1) {
    os.write(buffer, 0, length);
}
os.flush();
os.close();
fis.close();

步骤三：建立文件服务器

在目标服务器上监听客户端的请求信息，通过ServerSocket来实现。

ServerSocket serverSocket = new ServerSocket(port);
Socket socket = serverSocket.accept();

其中，端口号port需与发送端保持一致。

步骤四：建立文件输入输出流

服务器获取到客户端发送的信息后，通过InputStream将数据读取到内存，然后通过FileOutputStream写入到指定的目录中。具体实现可以参考以下代码：

InputStream is = socket.getInputStream();
FileOutputStream fos = new FileOutputStream("dst/file.txt");
byte[] buffer = new byte[1024];
int length;
while ((length = is.read(buffer)) != -1) {
    fos.write(buffer, 0, length);
}
fos.flush();
fos.close();
is.close();

示例

示例一：本地复制到远程服务器

import java.io.*;
import java.net.InetAddress;
import java.net.Socket;

public class CopyFileClient {

    public static void main(String[] args) throws Exception {
        String IP = "192.168.0.100";
        int port = 8888;
        File file = new File("src/file.txt");
        FileInputStream fis = new FileInputStream(file);
        Socket socket = new Socket(InetAddress.getByName(IP), port);
        OutputStream os = socket.getOutputStream();
        byte[] buffer = new byte[1024];
        int length;
        while ((length = fis.read(buffer)) != -1) {
            os.write(buffer, 0, length);
        }
        os.flush();
        os.close();
        fis.close();
        socket.close();
    }
}

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class CopyFileServer {

    public static void main(String[] args) throws Exception {
        int port = 8888;
        ServerSocket serverSocket = new ServerSocket(port);
        Socket socket = serverSocket.accept();
        InputStream is = socket.getInputStream();
        FileOutputStream fos = new FileOutputStream("dst/file.txt");
        byte[] buffer = new byte[1024];
        int length;
        while ((length = is.read(buffer)) != -1) {
            fos.write(buffer, 0, length);
        }
        fos.flush();
        fos.close();
        is.close();
        socket.close();
        serverSocket.close();
    }
}

示例二：远程服务器复制到本地

import java.io.*;
import java.net.InetAddress;
import java.net.Socket;

public class CopyFileClient {

    public static void main(String[] args) throws Exception {
        String IP = "192.168.0.100";
        int port = 8888;
        Socket socket = new Socket(InetAddress.getByName(IP), port);
        InputStream is = socket.getInputStream();
        FileOutputStream fos = new FileOutputStream("dst/file.txt");
        byte[] buffer = new byte[1024];
        int length;
        while ((length = is.read(buffer)) != -1) {
            fos.write(buffer, 0, length);
        }
        fos.flush();
        fos.close();
        is.close();
        socket.close();
    }
}

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class CopyFileServer {

    public static void main(String[] args) throws Exception {
        int port = 8888;
        File file = new File("src/file.txt");
        FileInputStream fis = new FileInputStream(file);
        ServerSocket serverSocket = new ServerSocket(port);
        Socket socket = serverSocket.accept();
        OutputStream os = socket.getOutputStream();
        byte[] buffer = new byte[1024];
        int length;
        while ((length = fis.read(buffer)) != -1) {
            os.write(buffer, 0, length);
        }
        os.flush();
        os.close();
        fis.close();
        socket.close();
        serverSocket.close();
    }
}

以上就是Java实现两台服务器间文件复制的完整攻略。其中示例中的文件路径需要根据实际情况进行修改。