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我昨天的成就（完成了哪个任务，花了多少时间，还剩余多少时间）
- 后台管理课程视频的上传功能
- 资源课件的上传功能
- 上传文件问题，首先查阅资料了解文件上传的几种方式，参考博客：
- 文件上传的路径问题，即上传成功后如何自动保存至项目文件夹下
- 文件上传时如何限制上传文件的类型，在收到上传文件名时，如何判断后缀名是否合法？
- 上传下载的Servelt如何码，参考博客：
package com.classnet.util.upload;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.Serializable;import org.apache.commons.lang.StringUtils;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.apache.struts.upload.FormFile;/** * * 此类包含了关于上传文件的信息 * */public class UploadFileImpl implements UploadFile, Serializable { /** * */ private static final long serialVersionUID = 1L; private String path = "../upload/files";// 上传的路径; private int size;// 上传文件的大小 private int filesize;//当前文件的大小 private String fileType;// 文件类型 private FormFile file; static final Log log = LogFactory.getLog(UploadFile.class); public void setFile(FormFile file) { this.file = file; } /** * 判断类型是否可以上传 * * @param type * @param array * @return flag */ public boolean isFileType(String type, String array) { if (array.indexOf(type) == -1) return false; else return true; } /** * 得到文件类型。 */ public String getType(String str) { return str.substring(str.lastIndexOf(".") + 1, str.length()); } /* * (non-Javadoc) * * @see com.shsct.eq.util.upload.IUploadFile#getType() */ public String getType() { return getType(file.getFileName()); } /** * 去掉文件名后辍 * * @param fileName * @return */ public String removeType(String fileName) { if (fileName.lastIndexOf(".") != -1) { int le = fileName.lastIndexOf("."); fileName = fileName.substring(0, le); } return fileName; } /* * (non-Javadoc) * * @see com.shsct.eq.util.upload.IUploadFile#save() */ public void save() throws IOException, UploadException { if (this.file == null) throw new UploadException("文件不存在"); save(removeType(file.getFileName())); } /* * (non-Javadoc) * * @see com.shsct.eq.util.upload.IUploadFile#save(java.lang.String) */ public void save(String fileName) throws UploadException,IOException{ if(isFileSizeMax()) throw new UploadException("文件超过了指定的容量,文件只支持"+sizeByStr()); filename = file.getFileName(); BufferedInputStream in = null; BufferedOutputStream stream = null; try { if (file != null) { String type = getType(filename).toLowerCase(); // 上传的文件,并且转为小写 if (!StringUtils.isEmpty(fileType)) { if (!isFileType(type, fileType.toLowerCase())) { throw new Exception("文件格式不正确"); } } uploadFileName=FileHelper.joinFile(fileName, type); in = new BufferedInputStream(file.getInputStream()); if (!StringUtils.isEmpty(fileName)) { fullpath=FileHelper.joinPath(path, uploadFileName); } else { fullpath=FileHelper.joinPath(path, filename); } stream = new BufferedOutputStream( new FileOutputStream(fullpath)); int buf = 1024 * 6; byte[] bufByte = new byte[buf]; while (in.read(bufByte) != -1) { stream.write(bufByte); } stream.flush(); stream.close(); stream = null; in.close(); in = null; } else { throw new IOException("上传的文件不存在"); } } catch (Exception e) { // e.printStackTrace(); throw new UploadException(e); } finally { if (stream != null) { stream.close(); stream = null; } if (in != null) { in.close(); in = null; } } System.gc(); } /** * 用户只有设size大于0时才做判断 * @return */ boolean isFileSizeMax() { if (size > 0) { // log.info(file.getFileSize()); if (file.getFileSize() > size) { return true; } } return false; } public String sizeByStr() { if (size < 1024 * 1024 && size > 0) { return ((int) ((int) (size / 1024 * 1000)) / 1000) + "k"; } else if (size > 1024 * 1024 && size < 1024 * 1024 * 1024) { return ((int) ((int) (size / (1024 * 1024) * 1000)) / 1000) + "M"; } else { return "0k"; } } public String sizeByStr1() { // 重载sizeByStr方法 if (size > 0 && size < 1024 * 1024 * 1024) { return "true"; } else { return "false"; } } public UploadFileImpl(String path, int size,String filetype, FormFile file) { super(); /** * "jpg,gif" */ // TODO Auto-generated constructor stub if(file==null||file.getFileSize()<1) throw new IllegalArgumentException("上传的文件不存在"); this.path = path; this.size = size; this.fileType=filetype; this.file = file; MkDir md = new MkDir(); md.mkDir(path); filesize=file.getFileSize(); } public String getFilename() { // TODO Auto-generated method stub return filename; } public String getFullpath() { // TODO Auto-generated method stub return fullpath; } public String getUploadFileName() { // TODO Auto-generated method stub return uploadFileName; } private String uploadFileName; private String fullpath; private String filename; public int getFileSize() { // TODO Auto-generated method stub return filesize; }} - 仍然是后台管理系统文件上传下载功能