Scrapy中将数据保存至数据库

一、在settings.py文件中配置数据库连接参数

# 数据库连接参数
DB_HOST = '192.168.183.1'
DB_PORT = 3306
DB_USER = 'root'
DB_PASSWORD = '
DB_DATABASE = 'a'
DB_CHARSET = 'utf8'

# 设置一个管道用于将数据插入数据库
ITEM_PIPELINES = {
'dushu.pipelines.DushuPipeline': 300,
'dushu.pipelines.DushuMysql':301,
}

二、在pipelines.py文件定义管道

读取settings文件中的参数:

from scrapy.utils.project import get_project_settings
settings = get_project_settings()

# 将settings文件导入到python文件
from scrapy.utils.project import get_project_settings
import pymysql

class DushuMysql(object):
def __init__(self):
#settings中包含了setting的属性
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.database = settings['DB_DATABASE']
self.charset = settings['DB_CHARSET']
self.connect()

def connect(self):
self.conn = pymysql.connect(host=self.host,port=self.port,user=self.user,password=self.password,db=self.database,charset = self.charset,)
self.cursor = self.conn.cursor()

def process_item(self, item, spider):
try:
self.cursor.execute(
'insert into books values("%s","%s","%s")' % (item['src'],item['alt'],item['author'])
)
# 注意需要提交
self.conn.commit()
except Exception as e:
print(str(e))
return item

def close_spider(self, spider):
self.cursor.close()
self.conn.close()