第二阶段冲刺四

今天主要完成的任务：学习上传文件原理和解析改文件

遇到的困难：视频讲解的挺好的，无问题

解决办法：暂无

源程序代码实例

private boolean testFile(HttpServletRequest request)
    {
        boolean flag=false;
        Note note=new Note();
        Map<String, String> fileMap=new HashMap<String, String>();
        String title=request.getParameter("title");
        String see=request.getParameter("see");
        String kemu=request.getParameter("kemu");
        String userID=request.getParameter("userID");
        int userId=Integer.valueOf(userID);
        System.out.println("标题："+title);
        System.out.println("是否公开："+see);
        System.out.println("科目："+kemu);
        System.out.println("用户ID："+userId);
        
        note.setTitle(title);
        note.setCourse(kemu);
        note.setPermission(see);
        
        DiskFileItemFactory factory=new DiskFileItemFactory();
        ServletFileUpload sfu=new ServletFileUpload(factory);
        sfu.setFileSizeMax(30*1024*1024);
        List<FileItem> list=null;
        String path="/usr/local/CloudNote/";
        String path1="";
        Date t = new Date();
        SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd");
        SimpleDateFormat df2 = new SimpleDateFormat("yyyy-MM-dd");
        String date=df.format(t);
        String date_sql=df2.format(t);
        note.setDate(date_sql);
        try {
            list = sfu.parseRequest(request);
        } catch (FileUploadException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
            return false;
        }
        for(FileItem fileItem:list)
        {
            if(fileItem.isFormField())
            {
        
                String filename=fileItem.getFieldName();
                String value=null;
                try {
                    value = fileItem.getString("utf-8");
                } catch (UnsupportedEncodingException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                    return false;
                }
                if(filename.equals("username")) 
                {
                    path=path+value;
                    path1=path1+value;
                    File file=new File(path);
                    if(!file.exists()) 
                    {
                        file.mkdir();
                    }
                    path=path+"/"+date;
                    path1=path1+"/"+date;
                    File file2=new File(path);
                    if(!file2.exists()) 
                    {
                        file2.mkdir();
                    }
                }
                
                System.out.println(filename+"="+value);
            }
            else 
            {
                long size = fileItem.getSize();
                //判断size是否为0
                if(size==0){
                    continue;
                }
                //获取文件的类型
                String contentType = fileItem.getContentType();
                //获取文件的名字
                String name = fileItem.getName();
                String key=name;
                
                String prefix = UUID.randomUUID().toString().replace("-", "");
                name = prefix+"_"+name;
                if(contentType.equals("text/plain"))
                {
                    fileMap.put("txt_path",path1+"/"+name);
                }
                else 
                {
                    int a=1;
                    if(key.equals("image1.png"))
                    {
                        a=1;
                    }
                    else if(key.equals("image2.png"))
                    {
                        a=2;
                    }
                    else
                    {
                        a=3;
                    }
                    fileMap.put("image"+a+"_path",path1+"/"+name);
                }
                //获取表单项的属性名
                String fieldName = fileItem.getFieldName();
                System.out.println("文件的大小: "+size);
                System.out.println("文件的类型: "+contentType);
                System.out.println("文件的名字: "+name);
                System.out.println("表单项name属性名: "+fieldName);
                //将文件写入到磁盘中
                try {
                    fileItem.write(new File(path+"/"+name));
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                    
                }
            }
        }
        note.setFileMap(fileMap);
        try {
            userService=UserService.getUserService();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            flag=false;
        }
        flag=userService.addNote(note,userId);
        return flag;
    }