教务管理系统

package com.ischoolbar.programmer.servlet; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileUploadException; import com.ischoolbar.programmer.dao.StudentDao; import com.ischoolbar.programmer.dao.TeacherDao; import com.ischoolbar.programmer.model.Student; import com.ischoolbar.programmer.model.Teacher; import com.lizhou.exception.FileFormatException; import com.lizhou.exception.NullFileException; import com.lizhou.exception.ProtocolException; import com.lizhou.exception.SizeException; import com.lizhou.fileload.FileUpload; /** * * @author llq *图片处理类servlet */ public class PhotoServlet extends HttpServlet { /** * */ private static final long serialVersionUID = 3274927179113071465L; public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{ doPost(request, response); } public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException{ String method = request.getParameter("method"); if("getPhoto".equals(method)){ getPhoto(request,response); }else if("SetPhoto".equals(method)){ uploadPhoto(request,response); } } private void uploadPhoto(HttpServletRequest request, HttpServletResponse response) { // TODO Auto-generated method stub int sid = request.getParameter("sid") == null ? 0 : Integer.parseInt(request.getParameter("sid")); int tid = request.getParameter("tid") == null ? 0 : Integer.parseInt(request.getParameter("tid")); FileUpload fileUpload = new FileUpload(request); fileUpload.setFileFormat("jpg"); fileUpload.setFileFormat("png"); fileUpload.setFileFormat("jpeg"); fileUpload.setFileFormat("gif"); fileUpload.setFileSize(2048); response.setCharacterEncoding("UTF-8"); try { InputStream uploadInputStream = fileUpload.getUploadInputStream(); if(sid != 0){ Student student = new Student(); student.setId(sid); student.setPhoto(uploadInputStream); StudentDao studentDao = new StudentDao(); if(studentDao.setStudentPhoto(student)){ response.getWriter().write("<div id='message'>上传成功！</div>"); }else{ response.getWriter().write("<div id='message'>上传失败！</div>"); } } if(tid != 0){ Teacher teacher = new Teacher(); teacher.setId(tid); teacher.setPhoto(uploadInputStream); TeacherDao teacherDao = new TeacherDao(); if(teacherDao.setTeacherPhoto(teacher)){ response.getWriter().write("<div id='message'>上传成功！</div>"); }else{ response.getWriter().write("<div id='message'>上传失败！</div>"); } } } catch (ProtocolException e) { // TODO Auto-generated catch block try { response.getWriter().write("<div id='message'>上传协议错误！</div>"); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } e.printStackTrace(); }catch (NullFileException e1) { // TODO: handle exception try { response.getWriter().write("<div id='message'>上传的文件为空!</div>"); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } e1.printStackTrace(); } catch (SizeException e2) { // TODO: handle exception try { response.getWriter().write("<div id='message'>上传文件大小不能超过"+fileUpload.getFileSize()+"！</div>"); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } e2.printStackTrace(); } catch (IOException e3) { // TODO: handle exception try { response.getWriter().write("<div id='message'>读取文件出错！</div>"); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } e3.printStackTrace(); } catch (FileFormatException e4) { // TODO: handle exception try { response.getWriter().write("<div id='message'>上传文件格式不正确，请上传 "+fileUpload.getFileFormat()+" 格式的文件！</div>"); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } e4.printStackTrace(); } catch (FileUploadException e5) { // TODO: handle exception try { response.getWriter().write("<div id='message'>上传文件失败！</div>"); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } e5.printStackTrace(); } } private void getPhoto(HttpServletRequest request, HttpServletResponse response) { // TODO Auto-generated method stub //File file = new File(); int sid = request.getParameter("sid") == null ? 0 : Integer.parseInt(request.getParameter("sid")); int tid = request.getParameter("tid") == null ? 0 : Integer.parseInt(request.getParameter("tid")); if(sid != 0){ //学生 StudentDao studentDao = new StudentDao(); Student student = studentDao.getStudent(sid); studentDao.closeCon(); if(student != null){ InputStream photo = student.getPhoto(); if(photo != null){ try { byte[] b = new byte[photo.available()]; photo.read(b); response.getOutputStream().write(b,0,b.length); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return; } } } if(tid != 0){ //教师 TeacherDao teacherDao = new TeacherDao(); Teacher teacher = teacherDao.getTeacher(tid); teacherDao.closeCon(); if(teacher != null){ InputStream photo = teacher.getPhoto(); if(photo != null){ try { byte[] b = new byte[photo.available()]; photo.read(b); response.getOutputStream().write(b,0,b.length); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return; } } } String path = request.getSession().getServletContext().getRealPath(""); File file = new File(path+"\\file\\logo.jpg"); try { FileInputStream fis = new FileInputStream(file); byte[] b = new byte[fis.available()]; fis.read(b); response.getOutputStream().write(b,0,b.length); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }