node.js实现多图片上传实例

   //处理图片上传
   //console.dir(req.files);

   varfile_obj=req.files.pics;
   //console.log(file_obj.length);
   varfile_obj2=[];
   for(vari=0;i<file_obj.length;i++){
       if(file_obj[i].name){
           file_obj2.push(file_obj[i]);
       }
   }
   varlength=file_obj2.length;
   if(length>0){
       file_obj2.forEach(function(item,index){
           if(item.path){
           vartmpPath=item.path;
           vartype=item.type;
           varextension_name="";
           //移动到指定的目录，一般放到public的images文件下面
           //在移动的时候确定路径已经存在，否则会报错
           vartmp_name=(Date.parse(newDate())/1000);
           tmp_name=tmp_name+""+(Math.round(Math.random()*9999));
           //判断文件类型
           switch(type){
               case"image/pjpeg":extension_name="jpg";
                   break;
               case"image/jpeg":extension_name="jpg";
                   break;
               case"image/gif":extension_name="gif";
                   break;
               case"image/png":extension_name="png";
                   break;
               case"image/x-png":extension_name="png";
                   break;
               case"image/bmp":extension_name="bmp";
                   break;
           }
           vartmp_name=tmp_name+"."+extension_name;
           vartargetPath="public/images/"+tmp_name;
           console.log(tmpPath);
           //将上传的临时文件移动到指定的目录下
           fs.rename(tmpPath,targetPath,function(err){
               if(err){
                   throwerr;
               }
               if(pics){
                   pics+=","+tmp_name;
               }else{
                   pics+=tmp_name;
               }
               //判断是否完成
               //console.log(index);
                //删除临时文件
               fs.unlink(tmpPath,function(){
                   if(err){
                       throwerr;
                   }else{
                       if((index+1)==length){
                   console.log(targetPath);
                   //上传处理完成
                   //数据
                   vardata={
                       x:x,//经度
                       y:y,//维度
                       cat_id:cat_id,//分类id
                       cat_name:cat_name,//分类名称
                       address:address,//地址
                       title:title,//标题
                       desc:desc,//简介
                       content:content,//内容
                       pics:pics,//图片字段，以","隔开多张图片
                       price:price,//价格
                       tags:tags,//标签以","隔开多个
                       add_time:add_time,//支持度
                       support:support,//支持度默认为0
                       uid:uid//用户id可匿名
                   };
                   food_preDao.insert(data,function(err,food){
                       if(err){
                           res.json({err:100,content:"数据库错误"});
                       }else{
                           res.json({err:0,content:"发布成功！",data:food});
                       }

                   });
               }
                   }
               });

           });
           }
        });
   }else{
       //没有图片
       //数据
       vardata={
           x:x,//经度
           y:y,//维度
           cat_id:cat_id,//分类id
           cat_name:cat_name,//分类名称
           address:address,//地址
           title:title,//标题
           desc:desc,//简介
           content:content,//内容
           pics:pics,//图片字段，以","隔开多张图片
           price:price,//价格
           tags:tags,//标签以","隔开多个
           add_time:add_time,//支持度
           support:support,//支持度默认为0
           uid:uid//用户id可匿名
       };
       food_preDao.insert(data,function(err,food){
           if(err){
               res.json({err:100,content:"数据库错误"});
           }else{
               res.json({err:0,content:"发布成功！",data:food});
           }

       });
   }

 }
};