安装npm install formidable
先把文件上传到临时文件夹，再通过fs重命名移动到指定的目录即可
fs.rename即重命名，但是fs.rename不能夸磁盘移动文件，所以我们需要指定上传的临时目录要和最终目录在同一磁盘下
上传实现方法：form解析后的files是个对象，所以可以实现多文件上传
tool.uploadImg =function(req, res){
var fs =
require(‘fs‘);
var formidable =
require("formidable");
var form = new
formidable.IncomingForm();
form.uploadDir =
"./public/upload/temp/";//改变临时目录
form.parse(req,
function(error, fields, files){
for(var key in
files){
var file =
files[key];
var fName = (new
Date()).getTime();
switch
(file.type){
case
"image/jpeg":
fName = fName +
".jpg";
break;
case
"image/png":
fName = fName +
".png";
break;
default
:
fName =fName +
".png";
break;
}
console.log(file.size);
var uploadDir = "./public/upload/" +
fName;
fs.rename(file.path, uploadDir, function(err)
{
if (err)
{
res.write(err+"\n");
res.end();
}
res.write("upload
image:<br/>");
res.write("<img src=‘/imgShow?id=" + fName + "‘
/>");
res.end();
});
}
});
};
显示上传后的文件
tool.imgShow = function(req, res){
var fs =
require("fs");
var arg = tool.handleGetArg(req,
res);
var uploadDir = "./public/upload/" +
arg["id"];
fs.readFile(uploadDir, "binary", function(err,
file){
if(err){
res.write(err+"\n");
res.end();
}else{
res.write(file,
"binary");
res.end();
}
});
};