Java文件上传相对路径代码示例

以下是Java文件上传相对路径代码示例：

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

public class FileUploadClient {
    public static void main(String[] args) throws IOException {
        String host = "localhost"; // 服务器地址
        int port = 8888; // 服务器端口号
        String filePath = "test.txt"; // 文件路径
        String destPath = "upload/test.txt"; // 上传目标路径

        // 创建Socket对象
        Socket socket = new Socket(host, port);

        // 获取输出流
        OutputStream outputStream = socket.getOutputStream();

        // 获取文件输入流
        File file = new File(filePath);
        InputStream inputStream = new FileInputStream(file);

        // 写入文件名和长度
        outputStream.write(destPath.getBytes());
        outputStream.write("\r\n".getBytes());
        outputStream.write(String.valueOf(file.length()).getBytes());
        outputStream.write("\r\n".getBytes());

        // 写入文件内容
        byte[] buffer = new byte[1024];
        int len;
        while ((len = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, len);
        }

        // 关闭流
        inputStream.close();
        outputStream.close();
        socket.close();
    }
}