第一步：在项目根目录下，新建存放组件目录uitls，在创建文件Bootstrap.py

from django import forms

class Bootstrap():
    """ bootstrap框架样式附加 """
    def __init__(self,*args,**kwargs):
        super().__init__(*args,**kwargs)
        for name,field in self.fields.items():
            field.widget.attrs = {'class':'form-control','placeholder':'请输入'+field.label}

class BootstrapModelForm(Bootstrap,forms.ModelForm):
    """ 针对modelForm设置 """
    pass

class BootstrapForm(Bootstrap,forms.Form):
    """ 针对 Form设置 """
    pass

第二步：在视图文件views.py先导入，直接继承类就行

# 自定义bootstrap样式
from xitong.uitls.Bootstrap import BootstrapModelForm,BootstrapForm

class Userinfo(BootstrapModelForm):
    class Meta:
        model = User
        fields = '__all__'


def user_add(request):
    if request.method == 'GET':
        form = Userinfo()
        return render(request, 'xitong/user_add.html', locals())
    form = Userinfo(data=request.POST)
    if form.is_valid():
        form.save()
    return redirect('/xitong/user/list')