文件服务的文件分片上传接口说明: 访问路径接口:/0bjectFile/UploadMultipart Ip:192168.8.7 Port:4035 请求方式:POST请求参数: 参数 参数名称 备注 是否必填 file 分片文件 字节数组 是 bucketName 桶名 String 是 taskid 任务id 第一分片进入不需要传第二分片后必填，String size 分片文件大小 同一任务文件，分片大小一样.int 是 chunk 当前第几分片 int 是 chunkTotal 分片总数 int 是 filePath 文件保存路径 String 是 请求示例:请求示例 192.168.8.7:4035/0bjectFile/UploadMultipart //form-data提交格式 file:[1. bucketName:“1” taskid"13245-131654-a50 size:1024, chunk 1 chunkTotal:3 filePath:"/test/1 jpg如何用java代码实现

可以使用Java的HttpURLConnection类发送POST请求实现文件分片上传。具体代码实现如下：

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

public class FileUpload {
    public static void main(String[] args) throws Exception {
        String url = "http://192.168.8.7:4035/0bjectFile/UploadMultipart"; // 请求地址
        String filePath = "D:\\test\\1.jpg"; // 文件路径
        String bucketName = "1"; // 桶名
        int chunk = 1; // 当前分片
        int chunkTotal = 3; // 分片总数
        int size = 1024; // 分片大小
        String taskId = "13245-131654-a50"; // 任务id
        String savePath = "/test/1.jpg"; // 文件保存路径

        File file = new File(filePath);
        FileInputStream fis = new FileInputStream(file);
        byte[] buffer = new byte[size];
        int len = -1;
        while ((len = fis.read(buffer)) != -1) {
            String result = upload(url, buffer, bucketName, taskId, size, chunk, chunkTotal, savePath);
            // 解析返回结果...
        }
        fis.close();
    }

    private static String upload(String url, byte[] buffer, String bucketName, String taskId, int size, int chunk, int chunkTotal, String savePath) throws Exception {
        HttpURLConnection conn = null;
        OutputStream out = null;
        InputStream in = null;
        ByteArrayOutputStream baos = null;
        try {
            URL urlObj = new URL(url);

            conn = (HttpURLConnection) urlObj.openConnection();
            conn.setConnectTimeout(5000);
            conn.setReadTimeout(30000);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW");

            out = conn.getOutputStream();

            // 文件分片参数
            StringBuilder sb = new StringBuilder();
            sb.append("------WebKitFormBoundary7MA4YWxkTrZu0gW\r\n");
            sb.append("Content-Disposition: form-data; name=\"file\"; filename=\"" + taskId + "\"\r\n");
            sb.append("Content-Type: application/octet-stream\r\n\r\n");
            out.write(sb.toString().getBytes());

            out.write(buffer);

            sb = new StringBuilder();
            sb.append("\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW\r\n");
            sb.append("Content-Disposition: form-data; name=\"bucketName\"\r\n\r\n");
            sb.append(bucketName + "\r\n");

            sb.append("------WebKitFormBoundary7MA4YWxkTrZu0gW\r\n");
            sb.append("Content-Disposition: form-data; name=\"taskId\"\r\n\r\n");
            sb.append(taskId + "\r\n");

            sb.append("------WebKitFormBoundary7MA4YWxkTrZu0gW\r\n");
            sb.append("Content-Disposition: form-data; name=\"size\"\r\n\r\n");
            sb.append(size + "\r\n");

            sb.append("------WebKitFormBoundary7MA4YWxkTrZu0gW\r\n");
            sb.append("Content-Disposition: form-data; name=\"chunk\"\r\n\r\n");
            sb.append(chunk + "\r\n");

            sb.append("------WebKitFormBoundary7MA4YWxkTrZu0gW\r\n");
            sb.append("Content-Disposition: form-data; name=\"chunkTotal\"\r\n\r\n");
            sb.append(chunkTotal + "\r\n");

            sb.append("------WebKitFormBoundary7MA4YWxkTrZu0gW\r\n");
            sb.append("Content-Disposition: form-data; name=\"filePath\"\r\n\r\n");
            sb.append(savePath + "\r\n");

            sb.append("------WebKitFormBoundary7MA4YWxkTrZu0gW--\r\n");

            out.write(sb.toString().getBytes());
            out.flush();

            in = conn.getInputStream();
            baos = new ByteArrayOutputStream();
            byte[] buf = new byte[1024];
            int len = -1;
            while ((len = in.read(buf)) != -1) {
                baos.write(buf, 0, len);
            }
            return new String(baos.toByteArray());
        } finally {
            if (baos != null) {
                baos.close();
            }
            if (in != null) {
                in.close();
            }
            if (out != null) {
                out.close();
            }
            if (conn != null) {
                conn.disconnect();
            }
        }
    }
}