Django普通文件上传

前端代码：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="/static/jquery-3.2.1.min.js"></script>
    <script src="/static/jquery.cookie.js"></script>
</head>
<body>
<h1>文件上传页面</h1>
<form action="/upload/" method="post" enctype="multipart/form-data">
    {% csrf_token %}
    <p>用户名：<input type="text" name="username"></p>
    <p>文件：<input type="file" name="file"></p>
    <input type="submit" value="提交"><span>{{ successful }}</span>
</form>
</body>
</html>

后端处理：

def upload(request):
    if request.method == "GET":
        return render(request,"upload.html")
    else:
        file_obj = request.FILES.get("file")
        with open(file_obj.name,"wb") as f:
            for line in file_obj:
                f.write(line)
        successful = "上传成功"
        return render(request,"upload.html",locals())

效果图：

---

利用formdata上传文件：

用formdata上传需要先建立一个对象，然后这个对象吧里面的值append进去，串数据的时候直接把formdate串过去就好了

前端代码：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="/static/jquery-3.2.1.min.js"></script>
    <script src="/static/jquery.cookie.js"></script>
</head>
<body>
<form action="" id="s1">
    <p>姓名：<input type="text"></p>
    <p>密码：<input type="password"></p>
    <p>头像：<input type="file" id="upload" name="file"></p>
</form>
<p><button class="Ajax_send">Ajax_send</button><span class="login_error"></span></p>        #button需要放在form表单外边

</body>

<script>
    function foo() {
        $(".login_error").html("")
    }
    $(".Ajax_send").click(function () {
        var formDate = new FormData();
        formDate.append("username",$(":text").val());
        formDate.append("password",$(":password").val());
        formDate.append("avatar",$("#upload")[0].files[0]);
        $.ajax({
            url:"/ajax_form/",
            type:"POST",
            headers:{"X-CSRFToken":$.cookie('csrftoken')},
            data:formDate,
            contentType:false,
            processData:false,
            success:function (data) {
                var data = JSON.parse(data);
                if(!data["flag"]){
                    $(".login_error").html("用户名或密码错误")
                    setTimeout(foo,3000)
                }
                else{
                    alert("上传成功")
                }
            }
        })
    })
</script>
</html>　

后端代码：

def ajax_form(request):
    if request.method == "GET":
        return render(request,"formdate.html")
    else:
        username = request.POST.get("username")
        password = request.POST.get("password")

        file_obj = request.FILES.get("avatar")
        print("===================>",file_obj)
        with open(file_obj.name, "wb") as f:
            for line in file_obj:
                f.write(line)

        response = {"flag":False}
        if username=="username" and password == "password":
            response["flag"] = True
        import json
        return HttpResponse(json.dumps(response))　

---

简单的上传操作会让页面刷新，还有利用ajax无刷新技术上传的方式↓