<3> MongoDB存储

from pymongo import MongoClient

class Spider(object):

    def __init__(self):

        # 将数据存储到数据库中
        try:
            self.client = MongoClient('localhost', 27017)
            self.sina_db = self.client.sina
            self.jd_collection = self.sina_db.collection_sina
            # 标识
            self.opened = True
        except:
            print('服务未启动')
            self.opened = False

    def save(self):
　　　　try:
          # 将字典数据插入到 MongoDB 数据库中
　　　　　　self.jd_collection.insert_one(data_dict)
       except:
          print('数据入库失败')

    # 关闭爬虫
    def close_spider(self):
        if self.opened:
            # 关闭数据库客户端
            self.client.close()