您指向文件所在的目录，但没有为其指定文件名。我想说让用户决定客户端的文件名并将其添加到路径中。
<input name="userFileName" type="text">//userFilename Here</input>
var myFILENAME = req.body.userFilename
startup_image.mv('/images/'+myFILENAME+'.jpg', ..) //myFILENAME needs to be added here
另请参阅完整示例如何使用express-fileupload上传文件 https://www.npmjs.com/package/express-fileupload
UPDATE
我找到了您需要添加的问题的解决方案__dirname到这一行，这将使程序知道您当前的目录source code.
startup_image.mv(__dirname + '/images' , function(err) {..
UPDATE 2
这是我的源代码，如果你愿意的话可以尝试一下。
my html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<form ref='uploadForm' encType="multipart/form-data" class="" action="/upload" method="post">
<input type="text" name="fileName" value=""><br>
<input type="file" name="foo" value=""><br>
<input type="submit" name="" value="upload!">
</form>
</body>
</html>
我的主要来源
var express = require("express);
var app = express();
const fileUpload = require('express-fileupload');
//npm install ejs, express, express-fileupload
//middleware
app.use(express.static(__dirname));
app.set('view engine', 'ejs');
app.use(fileUpload());
app.get('/inputFile', function(req, res){
res.render('inputt');
});
app.post('/upload', function(req, res) {
// The name of the input field (i.e. "sampleFile") is used to retrieve the uploaded file
var startup_image = req.files.foo;
var fileName = req.body.fileName;
// Use the mv() method to place the file somewhere on your server
startup_image.mv(__dirname + '/images/' + fileName + '.jpg' , function(err) {
if(err){
console.log(err);
}else{
console.log("uploaded");
}
});
});
app.listen(7777);
