阿里云OSS 分块上传的代码整理

废话不多说，把代码贴出来。

package com.changba.erp.utils;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.Collections;import java.util.Comparator;import java.util.List;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.web.multipart.MultipartFile;import com.aliyun.oss.OSSClient;import com.aliyun.oss.model.CompleteMultipartUploadRequest;import com.aliyun.oss.model.InitiateMultipartUploadRequest;import com.aliyun.oss.model.InitiateMultipartUploadResult;import com.aliyun.oss.model.ListPartsRequest;import com.aliyun.oss.model.PartETag;import com.aliyun.oss.model.PartListing;import com.aliyun.oss.model.PartSummary;import com.aliyun.oss.model.UploadPartRequest;import com.aliyun.oss.model.UploadPartResult;public class AliyunOSSUpload implements Runnable {private MultipartFile localFile;private long startPos;private long partSize;private int partNumber;private String uploadId;private static String key;private static String bucketName;// 新建一个List保存每个分块上传后的ETag和PartNumberprotected static List<PartETag> partETags = Collections.synchronizedList(new ArrayList<PartETag>());private static Logger logger = LoggerFactory.getLogger(FileUploader.class);protected static OSSClient client = null;/** * 创建构造方法 *  * @param localFile *            要上传的文件 * @param startPos *            每个文件块的开始 * @param partSize * @param partNumber * @param uploadId *            作为块的标识 * @param key *            上传到OSS后的文件名 */public AliyunOSSUpload(MultipartFile localFile, long startPos, long partSize, int partNumber, String uploadId, String key , String bucketName) {this.localFile = localFile;this.startPos = startPos;this.partSize = partSize;this.partNumber = partNumber;this.uploadId = uploadId;AliyunOSSUpload.key = key;AliyunOSSUpload.bucketName = bucketName;}/** * 分块上传核心方法(将文件分成按照每个5M分成N个块，并加入到一个list集合中) */@Overridepublic void run() {InputStream instream = null;try {// 获取文件流instream = localFile.getInputStream();// 跳到每个分块的开头instream.skip(this.startPos);// 创建UploadPartRequest，上传分块UploadPartRequest uploadPartRequest = new UploadPartRequest();uploadPartRequest.setBucketName(bucketName);uploadPartRequest.setKey(key);uploadPartRequest.setUploadId(this.uploadId);uploadPartRequest.setInputStream(instream);uploadPartRequest.setPartSize(this.partSize);uploadPartRequest.setPartNumber(this.partNumber);UploadPartResult uploadPartResult = FileUploader.client.uploadPart(uploadPartRequest);logger.info("Part#" + this.partNumber + " done\n");synchronized (partETags) {// 将返回的PartETag保存到List中。partETags.add(uploadPartResult.getPartETag());}} catch (Exception e) {e.printStackTrace();} finally {if (instream != null) {try {// 关闭文件流instream.close();} catch (IOException e) {e.printStackTrace();}}}}/** * 初始化分块上传事件并生成uploadID，用来作为区分分块上传事件的唯一标识 *  * @return */protected static String claimUploadId(String bucketName, String key) {InitiateMultipartUploadRequest request = new InitiateMultipartUploadRequest(bucketName, key);InitiateMultipartUploadResult result = FileUploader.client.initiateMultipartUpload(request);logger.info(result.getUploadId());return result.getUploadId();}/** * 将文件分块进行升序排序并执行文件上传。 *  * @param uploadId */protected static void completeMultipartUpload(String uploadId) {// 将文件分块按照升序排序Collections.sort(partETags, new Comparator<PartETag>() {@Overridepublic int compare(PartETag p1, PartETag p2) {return p1.getPartNumber() - p2.getPartNumber();}});CompleteMultipartUploadRequest completeMultipartUploadRequest = new CompleteMultipartUploadRequest(bucketName,key, uploadId, partETags);// 完成分块上传FileUploader.client.completeMultipartUpload(completeMultipartUploadRequest);}/** * 列出文件所有分块的清单 *  * @param uploadId */protected static void listAllParts(String uploadId) {ListPartsRequest listPartsRequest = new ListPartsRequest(bucketName, key, uploadId);// 获取上传的所有分块信息PartListing partListing = FileUploader.client.listParts(listPartsRequest);// 获取分块的大小int partCount = partListing.getParts().size();// 遍历所有分块for (int i = 0; i < partCount; i++) {PartSummary partSummary = partListing.getParts().get(i);logger.info("分块编号 " + partSummary.getPartNumber() + ", ETag=" + partSummary.getETag());}}}

文件上传代码：

package com.changba.erp.utils;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.TimeUnit;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.web.multipart.MultipartFile;import com.aliyun.oss.OSSClient;public class FileUploader {private static String endpoint = "http://oss-cn-hangzhou.aliyuncs.com";private static String accessKeyId = "FAsc5DqUOpCMZqv8";private static String accessKeySecret = "ewbsDctAbvNQbBl4d66mcoYgNC9N9T";private static String bucketName = "mysong";protected static OSSClient client = null;private static Logger logger = LoggerFactory.getLogger(FileUploader.class);public static String fileUpload(MultipartFile file) {// 创建一个可重用固定线程数的线程池。若同一时间线程数大于10，则多余线程会放入队列中依次执行ExecutorService executorService = Executors.newFixedThreadPool(10);String key = file.getOriginalFilename(); // 获取上传文件的名称，作为在OSS上的文件名// 创建OSSClient实例client = new OSSClient(endpoint, accessKeyId, accessKeySecret);try {String uploadId = AliyunOSSUpload.claimUploadId(bucketName, key);// 设置每块为 5M(除最后一个分块以外，其他的分块大小都要大于5MB)final long partSize = 5 * 1024 * 1024L;// 计算分块数目long fileLength = file.getSize();int partCount = (int) (fileLength / partSize);if (fileLength % partSize != 0) {partCount++;}// 分块 号码的范围是1~10000。如果超出这个范围，OSS将返回InvalidArgument的错误码。if (partCount > 10000) {throw new RuntimeException("文件过大(分块大小不能超过10000)");} else {logger.info("一共分了 " + partCount + " 块");}/** * 将分好的文件块加入到list集合中 */for (int i = 0; i < partCount; i++) {long startPos = i * partSize;long curPartSize = (i + 1 == partCount) ? (fileLength - startPos) : partSize;// 线程执行。将分好的文件块加入到list集合中executorService.execute(new AliyunOSSUpload(file, startPos, curPartSize, i + 1, uploadId, key, bucketName));}/** * 等待所有分片完毕 */// 关闭线程池（线程池不马上关闭），执行以前提交的任务，但不接受新任务。executorService.shutdown();// 如果关闭后所有任务都已完成，则返回 true。while (!executorService.isTerminated()) {try {// 用于等待子线程结束，再继续执行下面的代码executorService.awaitTermination(5, TimeUnit.SECONDS);} catch (InterruptedException e) {e.printStackTrace();}}/** * partETags(上传块的ETag与块编号（PartNumber）的组合) 如果校验与之前计算的分块大小不同，则抛出异常 */System.out.println(AliyunOSSUpload.partETags.size()  +" -----   "+partCount);if (AliyunOSSUpload.partETags.size() != partCount) {throw new IllegalStateException("OSS分块大小与文件所计算的分块大小不一致");} else {logger.info("将要上传的文件名  " + key + "\n");}/* * 列出文件所有的分块清单并打印到日志中，该方法仅仅作为输出使用 */AliyunOSSUpload.listAllParts(uploadId);/* * 完成分块上传 */AliyunOSSUpload.completeMultipartUpload(uploadId);// 返回上传文件的URL地址return endpoint + "/" + bucketName + "/" + client.getObject(bucketName, key).getKey();} catch (Exception e) {logger.error("上传失败！", e);return "上传失败！";} finally {AliyunOSSUpload.partETags.clear();if (client != null) {client.shutdown();}}}}