页面：
上传文件时的关键词：enctype="multipart/form-data"
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head> <base href="<%=basePath%>" rel="external nofollow" > <title>上传视频</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"></head><body> <div> <div> <div align="center"><h1>文件上传</h1></div> <hr> <form id="upload" method="post" action="uploadflv/upload.do" enctype="multipart/form-data"> <div align="center"> <div>文件上传 <input type="file" name="file" id="file"><br> <input type="submit" value="上传"> </div> </div> </form> </div> </div></body></html>
后台：
controller
import javax.servlet.http.HttpServletRequest;import model.FileEntity;import org.springframework.stereotype.Controller;import org.springframework.ui.ModelMap;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.servlet.ModelAndView;@Controller@RequestMapping("/uploadflv")public class UploadController { @RequestMapping(value = "/upload", method={RequestMethod.POST,RequestMethod.GET}) @ResponseBody public ModelAndView upload(@RequestParam(value = "file", required = false) MultipartFile multipartFile, HttpServletRequest request, ModelMap map) { String message = ""; FileEntity entity = new FileEntity(); FileUploadTool fileUploadTool = new FileUploadTool(); try { entity = fileUploadTool.createFile(multipartFile, request); if (entity != null) {// service.saveFile(entity); message = "上传成功"; map.put("entity", entity); map.put("result", message); } else { message = "上传失败"; map.put("result", message); } } catch (Exception e) { e.printStackTrace(); } return new ModelAndView("result", map); }}工具类
import java.io.File;import java.io.IOException;import java.sql.Timestamp;import java.text.DecimalFormat;import java.util.Arrays;import java.util.Iterator;import javax.servlet.http.HttpServletRequest;import model.FileEntity;import org.springframework.web.multipart.MultipartFile;public class FileUploadTool { TransfMediaTool transfMediaTool = new TransfMediaTool(); // 文件最大500M private static long upload_maxsize = 800 * 1024 * 1024; // 文件允许格式 private static String[] allowFiles = { ".rar", ".doc", ".docx", ".zip", ".pdf", ".txt", ".swf", ".xlsx", ".gif", ".png", ".jpg", ".jpeg", ".bmp", ".xls", ".mp4", ".flv", ".ppt", ".avi", ".mpg", ".wmv", ".3gp", ".mov", ".asf", ".asx", ".vob", ".wmv9", ".rm", ".rmvb" }; // 允许转码的视频格式（ffmpeg） private static String[] allowFLV = { ".avi", ".mpg", ".wmv", ".3gp", ".mov", ".asf", ".asx", ".vob" }; // 允许的视频转码格式(mencoder) private static String[] allowAVI = { ".wmv9", ".rm", ".rmvb" }; public FileEntity createFile(MultipartFile multipartFile, HttpServletRequest request) { FileEntity entity = new FileEntity(); boolean bflag = false; String fileName = multipartFile.getOriginalFilename().toString(); // 判断文件不为空 if (multipartFile.getSize() != 0 && !multipartFile.isEmpty()) { bflag = true; // 判断文件大小 if (multipartFile.getSize() <= upload_maxsize) { bflag = true; // 文件类型判断 if (this.checkFileType(fileName)) { bflag = true; } else { bflag = false; System.out.println("文件类型不允许"); } } else { bflag = false; System.out.println("文件大小超范围"); } } else { bflag = false; System.out.println("文件为空"); } if (bflag) { String logoPathDir = "/video/"; String logoRealPathDir = request.getSession().getServletContext().getRealPath(logoPathDir); // 上传到本地磁盘 // String logoRealPathDir = "E:/upload"; File logoSaveFile = new File(logoRealPathDir); if (!logoSaveFile.exists()) { logoSaveFile.mkdirs(); } String name = fileName.substring(0, fileName.lastIndexOf(".")); System.out.println("文件名称：" + name); // 新的文件名 String newFileName = this.getName(fileName); // 文件扩展名 String fileEnd = this.getFileExt(fileName); // 绝对路径 String fileNamedirs = logoRealPathDir + File.separator + newFileName + fileEnd; System.out.println("保存的绝对路径：" + fileNamedirs); File filedirs = new File(fileNamedirs); // 转入文件 try { multipartFile.transferTo(filedirs); } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } // 相对路径 entity.setType(fileEnd); String fileDir = logoPathDir + newFileName + fileEnd; StringBuilder builder = new StringBuilder(fileDir); String finalFileDir = builder.substring(1); // size存储为String String size = this.getSize(filedirs); // 源文件保存路径 String aviPath = filedirs.getAbsolutePath(); // 转码Avi// boolean flag = false; if (this.checkAVIType(fileEnd)) { // 设置转换为AVI格式后文件的保存路径 String codcAviPath = logoRealPathDir + File.separator + newFileName + ".avi"; // 获取配置的转换工具（mencoder.exe）的存放路径 String mencoderPath = request.getSession().getServletContext().getRealPath("/tools/mencoder.exe"); aviPath = transfMediaTool.processAVI(mencoderPath, filedirs.getAbsolutePath(), codcAviPath); fileEnd = this.getFileExt(codcAviPath); } if (aviPath != null) { // 转码Flv if (this.checkMediaType(fileEnd)) { try { // 设置转换为flv格式后文件的保存路径 String codcFilePath = logoRealPathDir + File.separator + newFileName + ".flv"; // 获取配置的转换工具（ffmpeg.exe）的存放路径 String ffmpegPath = request.getSession().getServletContext().getRealPath("/tools/ffmpeg.exe"); transfMediaTool.processFLV(ffmpegPath, aviPath, codcFilePath); fileDir = logoPathDir + newFileName + ".flv"; builder = new StringBuilder(fileDir); finalFileDir = builder.substring(1); } catch (Exception e) { e.printStackTrace(); } } entity.setSize(size); entity.setPath(finalFileDir); entity.setTitleOrig(name); entity.setTitleAlter(newFileName); Timestamp timestamp = new Timestamp(System.currentTimeMillis()); entity.setUploadTime(timestamp); return entity; } else { return null; } } else { return null; } } /** * 文件类型判断 * * @param fileName * @return */ private boolean checkFileType(String fileName) { Iterator<String> type = Arrays.asList(allowFiles).iterator(); while (type.hasNext()) { String ext = type.next(); if (fileName.toLowerCase().endsWith(ext)) { return true; } } return false; } /** * 视频类型判断(flv) * * @param fileName * @return */ private boolean checkMediaType(String fileEnd) { Iterator<String> type = Arrays.asList(allowFLV).iterator(); while (type.hasNext()) { String ext = type.next(); if (fileEnd.equals(ext)) { return true; } } return false; } /** * 视频类型判断(AVI) * * @param fileName * @return */ private boolean checkAVIType(String fileEnd) { Iterator<String> type = Arrays.asList(allowAVI).iterator(); while (type.hasNext()) { String ext = type.next(); if (fileEnd.equals(ext)) { return true; } } return false; } /** * 获取文件扩展名 * * @return string */ private String getFileExt(String fileName) { return fileName.substring(fileName.lastIndexOf(".")); } /** * 依据原始文件名生成新文件名 * @return */ private String getName(String fileName) { Iterator<String> type = Arrays.asList(allowFiles).iterator(); while (type.hasNext()) { String ext = type.next(); if (fileName.contains(ext)) { String newFileName = fileName.substring(0, fileName.lastIndexOf(ext)); return newFileName; } } return ""; } /** * 文件大小，返回kb.mb * * @return */ private String getSize(File file) { String size = ""; long fileLength = file.length(); DecimalFormat df = new DecimalFormat("#.00"); if (fileLength < 1024) { size = df.format((double) fileLength) + "BT"; } else if (fileLength < 1048576) { size = df.format((double) fileLength / 1024) + "KB"; } else if (fileLength < 1073741824) { size = df.format((double) fileLength / 1048576) + "MB"; } else { size = df.format((double) fileLength / 1073741824) + "GB"; } return size; }}import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.util.ArrayList;import java.util.List;public class TransfMediaTool { /** * 视频转码flv * * @param ffmpegPath * 转码工具的存放路径 * @param upFilePath * 用于指定要转换格式的文件,要截图的视频源文件 * @param codcFilePath * 格式转换后的的文件保存路径 * @return * @throws Exception */ public void processFLV(String ffmpegPath, String upFilePath, String codcFilePath) { // 创建一个List集合来保存转换视频文件为flv格式的命令 List<String> convert = new ArrayList<String>(); convert.add(ffmpegPath); // 添加转换工具路径 convert.add("-i"); // 添加参数＂-i＂，该参数指定要转换的文件 convert.add(upFilePath); // 添加要转换格式的视频文件的路径 convert.add("-ab"); convert.add("56"); convert.add("-ar"); convert.add("22050"); convert.add("-q:a"); convert.add("8"); convert.add("-r"); convert.add("15"); convert.add("-s"); convert.add("600*500"); /* * convert.add("-qscale"); // 指定转换的质量 convert.add("6"); * convert.add("-ab"); // 设置音频码率 convert.add("64"); convert.add("-ac"); * // 设置声道数 convert.add("2"); convert.add("-ar"); // 设置声音的采样频率 * convert.add("22050"); convert.add("-r"); // 设置帧频 convert.add("24"); * convert.add("-y"); // 添加参数＂-y＂，该参数指定将覆盖已存在的文件 */ convert.add(codcFilePath); try { Process videoProcess = new ProcessBuilder(convert).redirectErrorStream(true).start(); new PrintStream(videoProcess.getInputStream()).start(); videoProcess.waitFor(); } catch (IOException e1) { e1.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } } /** * 对ffmpeg无法解析的文件格式(wmv9，rm，rmvb等), 先用mencoder转换为avi(ffmpeg能解析的)格式 * * @param mencoderPath * 转码工具的存放路径 * @param upFilePath * 用于指定要转换格式的文件,要截图的视频源文件 * @param codcFilePath * 格式转换后的的文件保存路径 * @return * @throws Exception */ public String processAVI(String mencoderPath, String upFilePath, String codcAviPath) {// boolean flag = false; List<String> commend = new ArrayList<String>(); commend.add(mencoderPath); commend.add(upFilePath); commend.add("-oac"); commend.add("mp3lame"); commend.add("-lameopts"); commend.add("preset=64"); commend.add("-lavcopts"); commend.add("acodec=mp3:abitrate=64"); commend.add("-ovc"); commend.add("xvid"); commend.add("-xvidencopts"); commend.add("bitrate=600"); commend.add("-of"); commend.add("avi"); commend.add("-o"); commend.add(codcAviPath); try { // 预处理进程 ProcessBuilder builder = new ProcessBuilder(); builder.command(commend); builder.redirectErrorStream(true); // 进程信息输出到控制台 Process p = builder.start(); BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream())); String line = null; while ((line = br.readLine()) != null) { System.out.println(line); } p.waitFor();// 直到上面的命令执行完，才向下执行 return codcAviPath; } catch (Exception e) { e.printStackTrace(); return null; } }}class PrintStream extends Thread { java.io.InputStream __is = null; public PrintStream(java.io.InputStream is) { __is = is; } public void run() { try { while (this != null) { int _ch = __is.read(); if (_ch != -1) System.out.print((char) _ch); else break; } } catch (Exception e) { e.printStackTrace(); } }}实体类
import java.sql.Timestamp;public class FileEntity { private String type; private String size; private String path; private String titleOrig; private String titleAlter; private Timestamp uploadTime; public String getType() { return type; } public void setType(String type) { this.type = type; } public String getSize() { return size; } public void setSize(String size) { this.size = size; } public String getPath() { return path; } public void setPath(String path) { this.path = path; } public String getTitleOrig() { return titleOrig; } public void setTitleOrig(String titleOrig) { this.titleOrig = titleOrig; } public String getTitleAlter() { return titleAlter; } public void setTitleAlter(String titleAlter) { this.titleAlter = titleAlter; } public Timestamp getUploadTime() { return uploadTime; } public void setUploadTime(Timestamp uploadTime) { this.uploadTime = uploadTime; }}总结
以上所述是小编给大家介绍的Java上传视频实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对武林网网站的支持！