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@@ -1,229 +0,0 @@
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-package com.yunzhi.marketing.common;
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-
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-import org.slf4j.Logger;
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-import org.slf4j.LoggerFactory;
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-
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-import java.io.File;
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-import java.io.IOException;
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-import java.io.InputStream;
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-import java.io.RandomAccessFile;
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-import java.net.HttpURLConnection;
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-import java.net.URL;
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-import java.util.concurrent.CountDownLatch;
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-import java.util.concurrent.LinkedBlockingDeque;
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-import java.util.concurrent.ThreadPoolExecutor;
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-import java.util.concurrent.TimeUnit;
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-import java.util.concurrent.locks.ReentrantLock;
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-
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-public class VideoThreadDownLoad {
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- public static final Logger LOG = LoggerFactory.getLogger(VideoThreadDownLoad.class);
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- /**
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- * 线程下载成功标志
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- */
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- private static int flag = 0;
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-
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- /**
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- * 服务器请求路径
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- */
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- private String serverPath;
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- /**
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- * 本地路径
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- */
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- private String localPath;
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-
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- /**
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- * 线程计数同步辅助
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- */
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- private CountDownLatch latch;
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-
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- private final int THREAD_POOL_CORE_SIZE= 10;
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- private final int THREAD_POOL_MAX_CORE_SIZE=30;
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- private final int THREAD_POOL_KEEP_ALIVE_TIME=60;
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-
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- // 定长线程池
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- private ThreadPoolExecutor threadPool = new ThreadPoolExecutor(THREAD_POOL_CORE_SIZE,THREAD_POOL_MAX_CORE_SIZE,THREAD_POOL_KEEP_ALIVE_TIME, TimeUnit.SECONDS,new LinkedBlockingDeque<>());
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-
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- public VideoThreadDownLoad(String serverPath, String localPath) {
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- this.serverPath = serverPath;
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- this.localPath = localPath;
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- }
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-
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- public synchronized static void downLoad(String serverPath, String localPath) {
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- LOG.info("{}文件开始下载,下载位置为{}",serverPath,localPath);
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- ReentrantLock lock = new ReentrantLock();
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- lock.lock();
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- VideoThreadDownLoad videoThreadDownLoad = new VideoThreadDownLoad(serverPath, localPath);
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- long startTime = System.currentTimeMillis();
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- boolean flag = false;
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- try {
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- flag = videoThreadDownLoad.executeDownLoad();
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- long endTime = System.currentTimeMillis();
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- if (flag) {
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- LOG.info(serverPath + "文件下载成功,共耗时" + (endTime - startTime) / 1000 + "s");
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- }
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- } catch (Exception ex) {
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- LOG.error(ex.getMessage());
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- } finally {
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- VideoThreadDownLoad.flag = 0; // 重置 下载状态
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- if (!flag) {
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- LOG.info("{}文件下载失败,本地文件已经删除。", serverPath);
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- File file = new File(localPath);
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- file.delete();
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- }
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- lock.unlock();
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- }
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- }
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-
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- /**
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- * 下载操作
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- * @return
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- */
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- public boolean executeDownLoad() {
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- try {
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- URL url = new URL(serverPath);
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- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
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- conn.setConnectTimeout(5000);//设置超时时间
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- conn.setRequestMethod("GET");//设置请求方式
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- conn.setRequestProperty("Connection", "Keep-Alive");
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- int code = conn.getResponseCode();
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- if (code != 200 && code != 206) {
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- LOG.info("无效网络地址:{}", serverPath);
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- return false;
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- }
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- //服务器返回的数据的长度,实际上就是文件的长度,单位是字节
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- long length = getRemoteFileSize(serverPath);
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-
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- LOG.info("文件总长度:" + length + "字节(B)");
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- RandomAccessFile raf = new RandomAccessFile(localPath, "rwd");
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- //指定创建的文件的长度
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- raf.setLength(length);
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- raf.close();
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- //分割文件
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- int partCount = getPartCount(length);
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- int partSize = (int)(length / partCount);
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- latch = new CountDownLatch(partCount);
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- for (int threadId = 1; threadId <= partCount; threadId++) {
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- // 每一个线程下载的开始位置
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- long startIndex = (threadId - 1) * partSize;
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- // 每一个线程下载的开始位置
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- long endIndex = startIndex + partSize - 1;
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- if (threadId == partCount) {
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- //最后一个线程下载的长度稍微长一点
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- endIndex = length;
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- }
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-// LOG.info("线程" + threadId + "下载:" + startIndex + "字节~" + endIndex + "字节");
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- threadPool.execute(new DownLoadThread(threadId, startIndex, endIndex, latch));
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- }
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- latch.await();
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- if(flag == 0){
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- return true;
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- }
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- } catch (Exception e) {
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- e.printStackTrace();
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- LOG.error("文件下载失败,文件地址:{},失败原因:{}", serverPath, e.getMessage());
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- }
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- return false;
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- }
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-
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- /**
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- * 计算分割多少文件比较合适
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- * @param length
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- * @return
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- */
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- private int getPartCount(long length) {
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- int size = (int) (length / 10485760);
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- return size + 1;
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- }
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-
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-
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- /**
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- * 内部方法,获取远程文件大小
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- * @param remoteFileUrl
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- * @return
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- * @throws IOException
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- */
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- private long getRemoteFileSize(String remoteFileUrl) throws IOException {
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- long fileSize = 0;
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- HttpURLConnection httpConnection = (HttpURLConnection) new URL(remoteFileUrl).openConnection();
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- httpConnection.setRequestMethod("HEAD");
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- int responseCode = 0;
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- try {
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- responseCode = httpConnection.getResponseCode();
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- } catch (IOException e) {
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- e.printStackTrace();
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- }
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- if (responseCode >= 400) {
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- LOG.error("Web服务器响应错误!");
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- return 0;
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- }
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- String sHeader;
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- for (int i = 1;; i++) {
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- sHeader = httpConnection.getHeaderFieldKey(i);
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- if (sHeader != null && sHeader.equals("Content-Length")) {
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- fileSize = Long.parseLong(httpConnection.getHeaderField(sHeader));
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- break;
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- }
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- }
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- return fileSize;
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- }
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-
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- /**
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- * 内部类用于实现下载
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- */
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- public class DownLoadThread implements Runnable {
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-
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- /**
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- * 线程ID
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- */
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- private int threadId;
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- /**
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- * 下载起始位置
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- */
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- private long startIndex;
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- /**
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- * 下载结束位置
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- */
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- private long endIndex;
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-
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- private CountDownLatch latch;
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-
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- public DownLoadThread(int threadId, long startIndex, long endIndex, CountDownLatch latch) {
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- this.threadId = threadId;
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- this.startIndex = startIndex;
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- this.endIndex = endIndex;
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- this.latch = latch;
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- }
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-
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- @Override
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- public void run() {
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- try {
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- URL url = new URL(serverPath);
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- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
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- conn.setRequestProperty("Connection", "Keep-Alive");
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- conn.setRequestMethod("GET");
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- //请求服务器下载部分的文件的指定位置
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- conn.setRequestProperty("Range", "bytes=" + startIndex + "-" + endIndex);
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- conn.setConnectTimeout(5000);
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- int code = conn.getResponseCode();
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- InputStream is = conn.getInputStream();//返回资源
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- RandomAccessFile raf = new RandomAccessFile(localPath, "rwd");
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- raf.seek(startIndex);//定位文件
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- int len = 0;
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- byte[] buffer = new byte[1024];
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- while ((len = is.read(buffer)) != -1) {
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- raf.write(buffer, 0, len);
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- }
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- is.close();
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- raf.close();
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- } catch (Exception e) {
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- //线程下载出错
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- VideoThreadDownLoad.flag = 1;
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- LOG.error(e.getMessage());
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- } finally {
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- //计数值减一
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- latch.countDown();
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- }
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-
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- }
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- }
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-}
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