使用Django和Ajax来在屏幕上显示上传的图片需要以下步骤:
# views.py
from django.shortcuts import render
from django.http import JsonResponse
def upload_image(request):
if request.method == 'POST' and request.FILES['image']:
image = request.FILES['image']
# 这里可以进行图片的保存、处理等操作
return JsonResponse({'success': True, 'image_url': image.url})
return JsonResponse({'success': False})
// main.js
function uploadImage() {
var formData = new FormData();
var fileInput = document.getElementById('image-input');
formData.append('image', fileInput.files[0]);
$.ajax({
url: '/upload_image/',
type: 'POST',
data: formData,
processData: false,
contentType: false,
success: function(response) {
if (response.success) {
var imageElement = document.getElementById('uploaded-image');
imageElement.src = response.image_url;
imageElement.style.display = 'block';
} else {
alert('上传失败!');
}
},
error: function() {
alert('请求失败!');
}
});
}
<!-- index.html -->
<form enctype="multipart/form-data">
<input type="file" id="image-input" name="image">
<button type="button" onclick="uploadImage()">上传图片</button>
</form>
<img id="uploaded-image" style="display: none;">
这样,当用户选择一张图片并点击上传按钮时,图片将被异步上传到服务器,并在上传成功后通过Ajax将图片的URL返回给前端页面,然后在屏幕上显示出来。
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1 将文件保存到服务器本地
upload.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
</head>
<body>
<form action="" method="post" enctype="multipart/form-data">
{% csrf_token %}
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