关于Django中JsonResponse返回中文字典编码错误的解决方案

时间:2024-05-19 16:22:53

解决方案:JsonResponse(data, json_dumps_params={'ensure_ascii':False})

! data是需要渲染的字典

def master(request):
    data = {'这是':'主页'}
    return  JsonResponse(data, json_dumps_params={'ensure_ascii':False})

 显示效果: 

关于Django中JsonResponse返回中文字典编码错误的解决方案

首先我们看JsonResponse()的源码:

class JsonResponse(HttpResponse): 

  def __init__(self, data, encoder=DjangoJSONEncoder, safe=True,
    json_dumps_params=None, **kwargs):

    if safe and not isinstance(data, dict):
      raise TypeError(
      'In order to allow non-dict objects to be serialized set the '
      'safe parameter to False.'
      )
    if json_dumps_params is None:
      json_dumps_params = {}
    kwargs.setdefault('content_type', 'application/json')
     data = json.dumps(data, cls=encoder, **json_dumps_params)
     super(JsonResponse, self).__init__(content=data, **kwargs)

 这里我们从根源开始找它编码错误的原因:

JsonResponse()在初始化的时候使用了json.dumps()把字典转换成了json格式,具体方法如下:

data = json.dumps(data, cls=encoder, **json_dumps_params)

接下来我们看看json.dumps()的源码:

def dumps(obj, skipkeys=False, ensure_ascii=True, check_circular=True,
        allow_nan=True, cls=None, indent=None, separators=None,
        default=None, sort_keys=False, **kw):
    if (not skipkeys and ensure_ascii and
        check_circular and allow_nan and
        cls is None and indent is None and separators is None and
        default is None and not sort_keys and not kw):
        return _default_encoder.encode(obj)
    if cls is None:
        cls = JSONEncoder
    return cls(skipkeys=skipkeys, ensure_ascii=ensure_ascii,
        check_circular=check_circular, allow_nan=allow_nan,         
        indent=indent,separators=separators, default=default, 
        sort_keys=sort_keys,**kw).encode(obj)    

 源码注释原文:If ``ensure_ascii`` is false, then the return value can contain non-ASCII characters if they appear in strings contained in ``obj``. Otherwise, all such characters are escaped in JSON strings.

 也就是说ensure_ascii是false的时候,可以返回非ASCII码的值,否则就会被JSON转义。

所以含有中文的字典转json字符串时,使用 json.dumps() 方法要把ensure_ascii参数改成false,即 json.dumps(dict,ensure_ascii=False)

JsonResponse()接收参数有关键词参数,json_dumps_params=None ,用来给 json.dumps() 传参,所以 要在关键字参数后面拼个字典来传另一组关键字参数 ensure_ascii=False,即:

json_dumps_params={'ensure_ascii':False}

综上可解决使用 JsonResponse() 强制把含有中文的字典转json并返回响应,前端渲染编码错误的问题。

    

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