java实现大文件上传代码实现

以下是一个简单的Java代码示例，展示了如何实现大文件上传：

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;

 class FileUploader {
    private static final int BUFFER = 4096;

 public static void uploadFile(StringUrl, String filePath) throws IOException {
        File file = new File(filePath);
        FileInputStream inputStream = new FileInputStream(file);

        URL url = new URL(serverUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoOutput(true);
        connection.setRequestMethod("POST");

        OutputStream outputStream = connection.getOutputStream();
        byte[] buffer = new byte[BUFFER_SIZE        int bytesRead;
        while ((bytesRead = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }

        int responseCode = connection.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            System.out.println("File uploaded successfully.");
        } else {
            System.out.println("File upload failed. Response code: " + responseCode);
        }

        outputStream.close();
        inputStream.close();
    }

    public static void main(String[] args) {
        String serverUrl = "http://example.com/upload";  // 替换为实际的服务器URL
        String filePath = "path/to/file";  // 替换为实际的文件路径

        try {
            uploadFile(serverUrl, filePath);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

在上面的示例中，`uploadFile`方法接收服务器URL和文件路径作为参数，并使用`HttpURLConnection`发送POST请求将文件内容上传到服务器。需要注意的是，这只是一个简单的示例，实际应用中可能需要添加错误处理、断点续传等功能。