JavaWeb中使用ffmpeg实现视频转码、视频截图、播放实现

package com.webapp.service; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.util.List; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.lang3.StringUtils; import com.webapp.dao.DaoFactory; import com.webapp.dao.MediaDao; import com.webapp.entity.Media; public class UploadMediaService extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); response.setContentType("text/html;charset=utf-8"); PrintWriter out = response.getWriter(); MediaDao mediaDao = DaoFactory.getMediaDao(); String message = ""; String uri = request.getRequestURI(); System.out.println("uri>>"+uri); String path = uri.substring(uri.lastIndexOf("/"), uri.lastIndexOf(".")); if ("/uploadFile".equals(path)) { // 提供解析时的一些缺省配置 DiskFileItemFactory factory = new DiskFileItemFactory(); // 创建一个解析器,分析InputStream,该解析器会将分析的结果封装成一个FileItem对象的集合 // 一个FileItem对象对应一个表单域 ServletFileUpload sfu = new ServletFileUpload(factory); try { Media media = new Media(); List<FileItem> items = sfu.parseRequest(request); boolean flag = false; // 转码成功与否的标记 for (int i = 0; i < items.size(); i++) { FileItem item = items.get(i); // 要区分是上传文件还是普通的表单域 if (item.isFormField()) {// isFormField()为true,表示这不是文件上传表单域 // 普通表单域 String paramName = item.getFieldName(); String paramValue = item.getString(); System.out.println("参数名称为:" + paramName + ", 对应的参数值为: " + paramValue); if (paramName.equals("title")) { media.setTitle(new String(item.getString() .getBytes("ISO8859-1"), "UTF-8")); } if (paramName.equals("descript")) { media.setDescript(new String(item.getString() .getBytes("ISO8859-1"), "UTF-8")); } } else { // 上传文件 // System.out.println("上传文件" + item.getName()); ServletContext sctx = this.getServletContext(); // 获得保存文件的路径 String basePath = sctx.getRealPath("videos"); // 获得文件名 String fileUrl = item.getName(); // 在某些操作系统上,item.getName()方法会返回文件的完整名称,即包括路径 String fileType = fileUrl.substring(fileUrl .lastIndexOf(".")); // 截取文件格式 // 自定义方式产生文件名 String serialName = String.valueOf(System .currentTimeMillis()); // 待转码的文件 File uploadFile = new File(basePath + "/temp/" + serialName + fileType); item.write(uploadFile); if (item.getSize() > 500 * 1024 * 1024) { message = "<li>上传失败！您上传的文件太大,系统允许最大文件500M</li>"; } String codcFilePath = basePath + "/" + serialName + ".flv"; // 设置转换为flv格式后文件的保存路径 String mediaPicPath = basePath + "/images" + File.separator + serialName + ".jpg"; // 设置上传视频截图的保存路径 // 获取配置的转换工具（ffmpeg.exe）的存放路径 String ffmpegPath = getServletContext().getRealPath( "/tools/ffmpeg.exe"); media.setSrc("videos/" + serialName + ".flv"); media.setPicture("videos/images/" + serialName + ".jpg"); String now = System.currentTimeMillis()+""; media.setUptime(now); // 转码 flag = mediaDao.executeCodecs(ffmpegPath, uploadFile.getAbsolutePath(), codcFilePath, mediaPicPath); } } if (flag) { // 转码成功,向数据表中添加该视频信息 mediaDao.saveMedia(media); message = "<li>上传成功!</li>"; } request.setAttribute("message", message); request.getRequestDispatcher("media_upload.jsp").forward( request, response); } catch (Exception e) { e.printStackTrace(); throw new ServletException(e); } } if ("/queryAll".equals(path)) { List<Media> mediaList; try { mediaList = mediaDao.queryALlMedia(0, 6); request.setAttribute("mediaList", mediaList); request.getRequestDispatcher("media_list.jsp").forward(request, response); } catch (Exception e) { e.printStackTrace(); } } if ("/play".equals(path)) { String idstr = request.getParameter("id"); int mediaId = -1; Media media = null; if (null != idstr) { mediaId = Integer.parseInt(idstr); } try { media = mediaDao.queryMediaById(mediaId); } catch (Exception e) { e.printStackTrace(); } request.setAttribute("media", media); request.getRequestDispatcher("media_player.jsp").forward(request, response); } } }