public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String expertName ="";
        String sex = "";
        String qq = "";
        String fangxiang = "";
        String expertphoto="";
        String expertintr="";
        String pwd1 = "";
        String pwd2 = "";
        UserDao userDao = new UserDao();
        Expert expert = new Expert();
        
        Map<String,String> addExpertError = new HashMap<String,String>();
        
       //获取上传文件工厂
        DiskFileItemFactory factory=new DiskFileItemFactory();
        //设置上传工厂的限制
        factory.setSizeThreshold(1024*1024*20);
        //设置上传的路径
        System.out.println(request.getContextPath());
        factory.setRepository(new File(request.getContextPath()+"/images/"));
        //根据上传工厂获取servletfileupload对象
        System.out.println(new File(request.getContextPath()+"/images/"));
        ServletFileUpload upload=new ServletFileUpload(factory);
        
        //设置上传文件的大小
        upload.setSizeMax(1024*1024*20);
        List items=null;
        try {
            items=upload.parseRequest(request);
        } catch (FileUploadException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        
        
        for(Iterator it=items.iterator();it.hasNext();){
            FileItem item=(FileItem)it.next();
            if(item.isFormField()){
                //根据不同的属性加进
                String name=item.getFieldName();
//                    System.out.println(name);
//                System.out.println("------------------"+request.getRealPath("/"));
                
                if(name.equals("name")){
                    expertName = item.getString("gbk");      
                    if(null==expertName||"".equals(expertName)){
                        addExpertError.put("nullname", "用户名不能为空！");
                    }else{
                        if(userDao.isExist(expertName)){
                            addExpertError.put("nameexist", "用户名已经存在！");
                        }else{
                            expert.setExpertName(expertName);
                        }    
                    }
                    
                }
                if(name.equals("sex")){
                    sex = item.getString("gbk");
                    expert.setExpertSex(sex.equals("man")?true:false);
                }
                if(name.equals("pwd1")){
                    pwd1 = item.getString("gbk");
                    if(null==pwd1||"".equals(pwd1)){
                        addExpertError.put("pwderror", "密码不能为空！");
                    }
                }
                if(name.equals("pwd2")){
                    pwd2 = item.getString("gbk");
                    if(!pwd1.equals("")&&!pwd2.equals(pwd1)){
                        addExpertError.put("pwdnotequal", "密码不一致！");
                    }
                    if(!pwd1.equals("")&&pwd2.equals(pwd1)){
                        expert.setExpertPwd(pwd2);
                    }
                    
                }
                if(name.equals("qq")){
                    qq = item.getString("gbk");    
                    if(null==qq||"".equals(qq)){
                        addExpertError.put("nullqq", "用户QQ不能为空！");
                    }else{
                        expert.setExpertQQ(qq);
                    }
    
                }
                if(name.equals("fangxiang")){
                    fangxiang = item.getString("gbk");
                    if(null==fangxiang||"".equals(fangxiang)){
                        addExpertError.put("nullfangxiang", "咨询方向不能为空！");
                    }else{
                        expert.setExpertSpeciality(fangxiang);
                    }
                    
                }
                    
                if(name.equals("content")){           
                    expertintr = item.getString("gbk");
                    if(null==expertintr||"".equals(expertintr)){
                        addExpertError.put("nullintro", "专家介绍不能为空！");
                    }else{
                        expert.setExpertIntro(expertintr);
                    }
                }    
          
            }else{
                
                if(addExpertError.size()!=0){
                    request.setAttribute("addExpertError", addExpertError);
                    request.getRequestDispatcher("/error.jsp").forward(request,response);                   
                }
                //获取字段的名字
                String fieldName=item.getFieldName();
                //获取文件的名字
                String fileName=item.getName();
                //获取文件的名字可以根据不同的后缀进行处理
                System.out.println(fileName);
//                int size = fileName.lastIndexOf("/");
//                fileName = expertphoto+fileName.substring(size,fileName.length());
//                System.out.println(fileName);
                //取得文件的类型
                String contentType=item.getContentType();    
                System.out.println(contentType);
                boolean flag = false;
                if(!contentType.equals("image/jpg")){
                    addExpertError.put("imageerror", "照片格式不正确，必须为jpg格式！");
                    request.setAttribute("addExpertError", addExpertError);
                    flag = true;
                }
                if(flag){
                    request.getRequestDispatcher("/error.jsp").forward(request, response);
                }
                expertphoto = fileName.substring(fileName.lastIndexOf("//"),fileName.length());
                expert.setExpertPhoto(expertphoto);
                FileOutputStream fos=new FileOutputStream(request.getRealPath("/images/")+"//"+
                            fileName.substring(fileName.lastIndexOf("／"),fileName.length()));
                //如果上传文件已经在内存中
                if(item.isInMemory()){
                     fos.write(item.get());
                }else{
                    //获取文件的输入流
                    InputStream is=item.getInputStream();
                    byte[] buffer=new byte[1024];
                    int len;
                    while((len=is.read(buffer))>0){
                        fos.write(buffer, 0, len);
                    }
                    is.close();
                    fos.close();
                    
                }
            }
        }
        //更新专家信息
        ExpertDao expertDao = new ExpertDao();
        
        if(!expertDao.addExpertInfo(expert)){
            addExpertError.put("expertinfoupdateerror", "更新信息时发生未知错误");
            request.setAttribute("addExpertError", addExpertError);
            request.getRequestDispatcher("/error.jsp").forward(request, response);
        }else{
            request.getRequestDispatcher("/success.jsp").forward(request, response);
        }
        
        
    }