pipelines.py檔案中新建MySQLPipeline類：

# 匯入庫
from scrapy.utils.project import get_project_settings
import pymysql

# 寫入資料庫
class MySQLPipeline(object):
    def connect_db(self):
        # 從settings.py檔案中匯入資料庫連線需要的相關資訊
        settings = get_project_settings()

        self.host = settings['DB_HOST']
        self.port = settings['DB_PORT'
 
]
        self.user = settings['DB_USER']
        self.password = settings['DB_PASSWORD']
        self.name = settings['DB_NAME']
        self.charset = settings['DB_CHARSET']

        # 連線資料庫
        self.conn = pymysql.connect(
            host = self.host,
            port = self.port,
            user = self.user,
            password = self.password,
            db = self.name,  # 資料庫名
 

            charset = self.charset,
        )

        # 操作資料庫的物件
        self.cursor = self.conn.cursor()

    # 連線資料庫
    def open_spider(self, spider):
        self.connect_db()

    # 關閉資料庫連線
    def close_spider(self, spider):
        self.cursor.close()
        self.conn.close()

    # 寫入資料庫
    def
 
 process_item(self, item, spider):
        # 寫入資料庫內容
        # 這裡根據需求自行設定要寫入的欄位及值
        sql = 'insert into book (title, img_url) values ("%s", "%s")' % (item['title'], item['img_url'])

        # 執行sql語句
        self.cursor.execute(sql)

        # 需要強制提交資料，否則資料回滾之後，資料庫為空
        self.conn.commit()

        return item

設定settings.py檔案，開啟ITEM_PIPELINE，並設定資料庫相關資訊：

ITEM_PIPELINES = {
   'dushuProject.pipelines.DushuprojectPipeline': 300,
   'dushuProject.pipelines.MySQLPipeline': 200,  # 優先順序設定稍靠前點
}

DB_HOST = 'localhost'
DB_PORT = 3306
DB_USER = '資料庫使用者名稱'
DB_PASSWORD = '資料庫密碼'
DB_NAME = '資料庫名'
DB_CHARSET = 'utf8'