当前位置：首页 > news >正文

django返回json的几种方法以及android调用

news 来源：原创 2024/4/29 23:53:46

2019独角兽企业重金招聘Python工程师标准>>>

用django做android后台，必不可缺少的就是返回json数据。返回json挺方便的，有以下几种方法：

1.最简单的一种（推荐）

model.py

class Click(models.Model):
    count = models.IntegerField()
    time = models.CharField(max_length=64, default="")

views.py

def json1(request):   
    all = Click.objects.values()
    return JSONResponse(all)

结果：

可能你需要的形式不是这样的，常用的是：

{“res”:"success", "msg":[{"count":1,"id":1,"time":"2015-12-12"},{"count":2,"id":2,"time":"2015-12-2"},{"count":3,"id":3,"time":"2015-12-3"}]}

需要修改views.py:

views.py

def json1(request):   
    all = Click.objects.values()
    return JSONResponse({"res":"success", "msg":all})

结果：

2.可以用框架djangorestframework.具体怎么用看官网，这只是个例子

model.py

class Click(models.Model):
    count = models.IntegerField()
    time = models.CharField(max_length=64, default="")

新建一个api.py文件，有点像struts2中的实例化

class ClickSerializer(serializers.ModelSerializer):
    class Meta:
        model = Click
        fields = ('id', 'count', 'time')

注意：id字段django会自动帮你创建（就是pk）

最后就是views.py

views.py

@csrf_exempt
def snippet_list(request):
    """
    List all code snippets, or create a new snippet.
    """
    if request.method == 'GET':
        snippets = Click.objects.all()
        serializer = ClickSerializer(snippets, many=True)
        return JSONResponse(serializer.data)

    elif request.method == 'POST':
        data = JSONParser().parse(request)
        serializer = ClickSerializer(data=data)
        if serializer.is_valid():
            serializer.save()
            return JSONResponse(serializer.data, status=201)
        return JSONResponse(serializer.errors, status=400)
@csrf_exempt
def snippet_detail(request, pk):
    """
    Retrieve, update or delete a code snippet.
    """
    try:
        snippet = Click.objects.get(pk=pk)
    except Click.DoesNotExist:
        return HttpResponse(status=404)

    if request.method == 'GET':
        serializer = ClickSerializer(snippet)
        return JSONResponse(serializer.data)

    elif request.method == 'PUT':
        data = JSONParser().parse(request)
        serializer = ClickSerializer(snippet, data=data)
        if serializer.is_valid():
            serializer.save()
            return JSONResponse(serializer.data)
        return JSONResponse(serializer.errors, status=400)

    elif request.method == 'DELETE':
        snippet.delete()
        return HttpResponse(status=204)

结果：

3.如果你只是想把一个字典返回，用simplejson.dumps就可以了。

def jsonTest(request):
    #主要是返回需要的结构类型
    data = []
    data1 = {}
    data1["name"] = "me"
    data1["age"] = "23"
    json_data = serializers.serialize("json", all)
    data.append(data1)
    jsons = simplejson.dumps({"res":"success", "msg":data})
    return HttpResponse(jsons, content_type="application/json")

结果：