基于javaweb的电子相册

package com.bian.servlet; import com.bian.biz.PhotoBiz; import com.bian.dao.LeiBieDAO; import com.bian.pojo.*; import java.io.File; import java.io.IOException; import java.sql.SQLException; import java.util.ArrayList; import java.util.Calendar; import java.util.Iterator; import java.util.List; 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.FileItemFactory; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; public class PhotoServlet 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.setCharacterEncoding("utf-8"); String action = request.getParameter("action"); PhotoBiz photoBiz = PhotoBiz.getInstance(); int pageSize = 6; //将页面显示的图片数量设置为域变量 if("photoAdd".equals(action)) { //当点击添加图片链接时 List<Leibie> categoryList = null; try { categoryList = new LeiBieDAO().getAllCategories(); } catch (SQLException e) { e.printStackTrace(); } request.setAttribute("categoryList", categoryList); request.getRequestDispatcher("photoAdd.jsp").forward(request, response); //当点击表单项：上传 时 } else if("add".equals(action)) { Boolean flag = false; Calendar calendar = Calendar.getInstance(); String newFileName = String.valueOf(calendar.getTimeInMillis()); FileItemFactory factory = new DiskFileItemFactory(); //创建一个文件项工厂 ServletFileUpload upload = new ServletFileUpload(factory); //create a new file upload handler List items=null; Photo photo = new Photo(); try { items = upload.parseRequest(request); //将请求解析（请求包含该表单中所有的parameter,按参数传递过来的顺序） //process the uploaded items Iterator iter = items.iterator(); while(iter.hasNext()) { FileItem item = (FileItem)iter.next(); if(item.isFormField()) { //是表单项时 String fieldName = item.getFieldName(); //因为直接用item.getString()获取的变量是乱码，可以用下面这种方式来转换编码 String fieldValue = new String(item.get(),"utf-8"); if(fieldName.equals("name")) { photo.setName(fieldValue); } else if(fieldName.equals("category")) { Leibie c = new Leibie(); c.setId(Integer.parseInt(fieldValue)); photo.setCategory(c); //因为在Photo类中存储的是category对象，而不只是类别id } else if(fieldName.equals("description")) { photo.setDescription(fieldValue); } } else { //不是表单项时 /*if("file1".equals(item.getFieldName())) { }*/ String fieldName = item.getFieldName(); String fileName = item.getName(); //因为是文件类型的参数，所以用getName() String ext = fileName.substring(fileName.lastIndexOf('.')+1); //取出要上传的文件的路径中的文件的扩展名 String contentType = item.getContentType(); boolean isInMemory = item.isInMemory(); long sizeInBytes = item.getSize(); String saveurl = request.getSession().getServletContext().getRealPath("/") + "uploading\\"; System.out.print("jjjjjjjjjjjjjjj"+saveurl); String newFileNameWithExt = newFileName + "." + ext; //新的文件名字（用文件上传的时间.ext作为新的名字，这样就不会重名） File uploadedFile = new File(saveurl + newFileNameWithExt); //文件的路径 System.out.print("sssssssssssssssssssssss"+uploadedFile); try { item.write(uploadedFile); //A convenience method to write an uploaded item to disk } catch (Exception e) { e.printStackTrace(); } // String photoPath = request.getContextPath() + "/uploading/" + newFileNameWithExt; String photoPath = newFileNameWithExt; photo.setPath(photoPath); photo.setContentTime(newFileName); } } } catch (FileUploadException e) { e.printStackTrace(); } //以上就生成了一个photo对象，下面将该对象存储到DB中 String msg = ""; try { msg = photoBiz.uploadPhoto(photo); } catch (SQLException e) { e.printStackTrace(); } request.setAttribute("msg", msg); request.getRequestDispatcher("admin/result.jsp").forward(request, response); } /*else if("photoList".equals(action)) { //未进行分页时的跳转 String strId = request.getParameter("id"); int id = Integer.parseInt(strId); List<Photo> photoList = null; try { photoList = photoBiz.getPhotoByCategoryId(id); } catch (SQLException e) { e.printStackTrace(); } request.setAttribute("photoList", photoList); request.getRequestDispatcher("admin/photoList.jsp").forward(request, response); } */else if("photoListByPage".equals(action)) { //将图片进行分页显示 int categoryId = Integer.parseInt(request.getParameter("categoryId")); int pageNo = Integer.parseInt(request.getParameter("pageNo")); Pager pager = null; try { pager = photoBiz.getPhotosByCIdandPageNo(categoryId, pageSize, pageNo); } catch (SQLException e) { e.printStackTrace(); } request.setAttribute("pager", pager); request.setAttribute("categoryId", categoryId); request.getRequestDispatcher("admin/photoList.jsp").forward(request, response); } else if("GoTo".equals(action)) { //根据传入的页码进行显示 int categoryId = Integer.parseInt(request.getParameter("categoryId")); int pageNo = Integer.parseInt(request.getParameter("pageNo")); Pager pager = null; try { pager = photoBiz.getPhotosByCIdandPageNo(categoryId, pageSize, pageNo); } catch (SQLException e) { e.printStackTrace(); } request.setAttribute("categoryId", categoryId); //也应该将categoryId传递进去，这里出错了 request.setAttribute("pager", pager); request.getRequestDispatcher("admin/photoList.jsp").forward(request, response); } else if("browsePhoto".equals(action)) { //点击浏览大图，及图片相关信息 int id = Integer.parseInt(request.getParameter("id")); Photo photo = null; List<Pinglun> pcList = new ArrayList<Pinglun>(); //存放该图片的所有评论集合 int total = 0; //存放该图片的评论条数 try { photo = photoBiz.getPhotoById(id); total = photoBiz.getPhotoCommentListByPid(id, pcList); } catch(SQLException e) { e.printStackTrace(); } request.setAttribute("photo", photo); request.setAttribute("total", total); request.setAttribute("pcList", pcList); request.getRequestDispatcher("admin/photoBrowse.jsp").forward(request, response); //response.sendRedirect("admin/photoBrowse.jsp"); } else if("delete".equals(action)) { //删除图片操作 int id = Integer.parseInt(request.getParameter("id")); String msg = ""; try { msg = photoBiz.deletePhotoById(id); } catch(SQLException e) { e.printStackTrace(); } request.setAttribute("msg", msg); request.getRequestDispatcher("admin/result.jsp").forward(request, response); } else if("modify1".equals(action)) { //修改图片信息 int id = Integer.parseInt(request.getParameter("id")); Photo p = null; try { p = photoBiz.getPhotoById(id); } catch (SQLException e) { e.printStackTrace(); } request.setAttribute("photo", p); request.getRequestDispatcher("admin/photoModify.jsp").forward(request, response); } else if("modify2".equals(action)) { //修改图片信息操作 int id = Integer.parseInt(request.getParameter("id")); String name = request