我需要一段httpClient实现视频分片上传功能的代码

好的，以下是一个基于HttpClient的视频分片上传示例代码：

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.InputStreamBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.HttpClientBuilder;

public class VideoUploader {

    private static final int BUFFER_SIZE = 4096;

    public static void main(String[] args) throws IOException {
        String filePath = "/path/to/video.mp4";
        String uploadUrl = "https://example.com/upload";
        int chunkSize = 1024 * 1024; // 1MB chunks

        // Get file information
        File videoFile = new File(filePath);
        String fileName = videoFile.getName();
        long fileSize = videoFile.length();

        // Create HTTP client
        HttpClient httpClient = HttpClientBuilder.create().build();

        // Upload file in chunks
        int chunkIndex = 0;
        long bytesUploaded = 0;
        while (bytesUploaded < fileSize) {
            long bytesRemaining = fileSize - bytesUploaded;
            int chunkLength = (int) Math.min(chunkSize, bytesRemaining);
            byte[] chunkBuffer = new byte[chunkLength];

            // Read chunk from file
            InputStream inputStream = new InputStream() {
                private int bytesRead = 0;

                @Override
                public int read() throws IOException {
                    if (bytesRead < chunkLength) {
                        int b = System.in.read();
                        bytesRead++;

                        if (b == -1) {
                            return -1;
                        } else {
                            chunkBuffer[bytesRead - 1] = (byte) b;
                            return b;
                        }
                    } else {
                        return -1;
                    }
                }
            };

            // Create multipart entity
            MultipartEntityBuilder builder = MultipartEntityBuilder.create();
            builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
            builder.addPart("file", new InputStreamBody(inputStream, fileName + ".part" + chunkIndex));
            builder.addPart("chunkIndex", new StringBody(Integer.toString(chunkIndex)));
            builder.addPart("chunkSize", new StringBody(Integer.toString(chunkSize)));
            builder.addPart("totalSize", new StringBody(Long.toString(fileSize)));

            HttpEntity entity = builder.build();

            // Create HTTP post request
            HttpPost httpPost = new HttpPost(uploadUrl);
            httpPost.setEntity(entity);

            // Execute HTTP request
            HttpResponse response = httpClient.execute(httpPost);
            if (HttpStatus.SC_OK == response.getStatusLine().getStatusCode()) {
                System.out.println("Uploaded " + chunkLength + " bytes");
                bytesUploaded += chunkLength;
                chunkIndex++;
            } else {
                System.err.println("Error uploading file: " + response.getStatusLine().getStatusCode());
                break;
            }
        }

        System.out.println("Finished uploading file");
    }

}

注意，这段代码仅为示例代码，不能直接运行。您需要根据实际情况修改代码，并确保在上传视频时遵守相关法规和规定。