表单上传文件
<!DOCTYPE html>
<html lang="en">
<head>
<Meta charset="UTF-8">
<title>测试文件上传</title>
</head>
<body>
<form action="/attach/upload" enctype="multipart/form-data" method="post">
<input type="file" name="content" /> <br>
<input type="submit" value="上传" />
</form>
</body>
</html>ajax文件上传
