Python入门-Python 爬小说存入数据库（Day4）

准备工作

安装：

# 数据库驱动
pip install pymysql
# 数据库连接池
pip install DBUtils

建表

CREATE TABLE `novel` (
   `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '自增主键',
   `title` varchar(100) NOT NULL COMMENT '标题',
   `content` text NOT NULL COMMENT '内容',
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=2353 DEFAULT CHARSET=utf8

脚本

# 写入数据库
def write_db(chapter, content):
    sql = "INSERT INTO novel (title, content) VALUES(%(title)s, %(content)s);"
    param = {"title": chapter, "content": content}
    mysql.insert(sql, param)

完整源码

book_db.py

# 导入requests库
import requests
# 导入文件操作库
import codecs
from bs4 import BeautifulSoup
import sys
import mysql_DBUtils
from mysql_DBUtils import MyPymysqlPool
import importlib
importlib.reload(sys)


# 给请求指定一个请求头来模拟chrome浏览器
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36'}
server = 'http://www.biquge.cm'
# 星辰变地址
book = 'http://www.biquge.cm/2/2042/'
# 定义DB
mysql = MyPymysqlPool("dbMysql")


# 获取章节内容
def get_contents(chapter):
    req = requests.get(url=chapter)
    html = req.content
    html_doc = str(html, 'gbk')
    bf = BeautifulSoup(html_doc, 'html.parser')
    texts = bf.find_all('div', id="content")
    # 获取div标签id属性content的内容 \xa0 是不间断空白符 &nbsp;
    content = texts[0].text.replace('\xa0' * 4, '\n')
    return content


# 写入数据库
def write_db(chapter, content):
    sql = "INSERT INTO novel (title, content) VALUES(%(title)s, %(content)s);"
    param = {"title": chapter, "content": content}
    mysql.insert(sql, param)


# 主方法
def main():
    res = requests.get(book, headers=headers)
    html = res.content
    html_doc = str(html, 'gbk')
    # 使用自带的html.parser解析
    soup = BeautifulSoup(html_doc, 'html.parser')
    # 获取所有的章节
    a = soup.find('div', id='list').find_all('a')
    print('总章节数: %d ' % len(a))
    for each in a:
        try:
            chapter = server + each.get('href')
            content = get_contents(chapter)
            chapter = each.string
            write_db(chapter, content)
        except Exception as e:
            print(e)
    mysql.dispose()


if __name__ == '__main__':
    main()

mysql_DBUtils.py

#!/usr/bin/python3
# -*- coding:utf-8 -*-
import pymysql, os, configparser
from pymysql.cursors import DictCursor
from DBUtils.PooledDB import PooledDB
import chardet
import json


class Config(object):
    """
    # Config().get_content("user_information")
    配置文件里面的参数
    [dbMysql]
    host = 192.168.1.101
    port = 3306
    user = root
    password = python123
    """

    def __init__(self, config_filename="dbMysqlConfig.cnf"):
        file_path = os.path.join(os.path.dirname(__file__), config_filename)
        self.cf = configparser.ConfigParser()
        self.cf.read(file_path)

    def get_sections(self):
        return self.cf.sections()

    def get_options(self, section):
        return self.cf.options(section)

    def get_content(self, section):
        result = {}
        for option in self.get_options(section):
            value = self.cf.get(section, option)
            result[option] = int(value) if value.isdigit() else value
        return result


class BasePymysqlPool(object):
    def __init__(self, host, port, user, password, db_name):
        self.db_host = host
        self.db_port = int(port)
        self.user = user
        self.password = str(password)
        self.db = db_name
        self.conn = None
        self.cursor = None


class MyPymysqlPool(BasePymysqlPool):
    """
    MYSQL数据库对象，负责产生数据库连接 , 此类中的连接采用连接池实现
        获取连接对象：conn = Mysql.getConn()
        释放连接对象;conn.close()或del conn
    """
    # 连接池对象
    __pool = None

    def __init__(self, conf_name=None):
        self.conf = Config().get_content(conf_name)
        super(MyPymysqlPool, self).__init__(**self.conf)
        # 数据库构造函数，从连接池中取出连接，并生成操作游标
        self._conn = self.__getConn()
        self._cursor = self._conn.cursor()

    def __getConn(self):
        """
        @summary: 静态方法，从连接池中取出连接
        @return MySQLdb.connection
        """
        if MyPymysqlPool.__pool is None:
            __pool = PooledDB(creator=pymysql,
                              mincached=1,
                              maxcached=20,
                              host=self.db_host,
                              port=self.db_port,
                              user=self.user,
                              passwd=self.password,
                              db=self.db,
                              use_unicode=False,
                              charset="utf8mb4",
                              cursorclass=DictCursor)
        return __pool.connection()

    def getAll(self, sql, param=None):
        """
        @summary: 执行查询，并取出所有结果集
        @param sql:查询ＳＱＬ，如果有查询条件，请只指定条件列表，并将条件值使用参数[param]传递进来
        @param param: 可选参数，条件列表值（元组/列表）
        @return: result list(字典对象)/boolean 查询到的结果集
        """
        if param is None:
            count = self._cursor.execute(sql)
        else:
            count = self._cursor.execute(sql, param)
        if count > 0:
            result = self._cursor.fetchall()
        else:
            result = False
        return result

    def getOne(self, sql, param=None):
        """
        @summary: 执行查询，并取出第一条
        @param sql:查询ＳＱＬ，如果有查询条件，请只指定条件列表，并将条件值使用参数[param]传递进来
        @param param: 可选参数，条件列表值（元组/列表）
        @return: result list/boolean 查询到的结果集
        """
        if param is None:
            count = self._cursor.execute(sql)
        else:
            count = self._cursor.execute(sql, param)
        if count > 0:
            result = self._cursor.fetchone()
        else:
            result = False
        return result

    def getMany(self, sql, num, param=None):
        """
        @summary: 执行查询，并取出num条结果
        @param sql:查询ＳＱＬ，如果有查询条件，请只指定条件列表，并将条件值使用参数[param]传递进来
        @param num:取得的结果条数
        @param param: 可选参数，条件列表值（元组/列表）
        @return: result list/boolean 查询到的结果集
        """
        if param is None:
            count = self._cursor.execute(sql)
        else:
            count = self._cursor.execute(sql, param)
        if count > 0:
            result = self._cursor.fetchmany(num)
        else:
            result = False
        return result

    def insertMany(self, sql, values):
        """
        @summary: 向数据表插入多条记录
        @param sql:要插入的ＳＱＬ格式
        @param values:要插入的记录数据tuple(tuple)/list[list]
        @return: count 受影响的行数
        """
        count = self._cursor.executemany(sql, values)
        return count

    def __query(self, sql, param=None):
        if param is None:
            count = self._cursor.execute(sql)
        else:
            count = self._cursor.execute(sql, param)
        return count

    def update(self, sql, param=None):
        """
        @summary: 更新数据表记录
        @param sql: ＳＱＬ格式及条件，使用(%s,%s)
        @param param: 要更新的  值 tuple/list
        @return: count 受影响的行数
        """
        return self.__query(sql, param)

    def insert(self, sql, param=None):
        """
        @summary: 更新数据表记录
        @param sql: ＳＱＬ格式及条件，使用(%s,%s)
        @param param: 要更新的  值 tuple/list
        @return: count 受影响的行数
        """
        return self.__query(sql, param)

    def delete(self, sql, param=None):
        """
        @summary: 删除数据表记录
        @param sql: ＳＱＬ格式及条件，使用(%s,%s)
        @param param: 要删除的条件 值 tuple/list
        @return: count 受影响的行数
        """
        return self.__query(sql, param)

    def begin(self):
        """
        @summary: 开启事务
        """
        self._conn.autocommit(0)

    def end(self, option='commit'):
        """
        @summary: 结束事务
        """
        if option == 'commit':
            self._conn.commit()
        else:
            self._conn.rollback()

    def dispose(self, isEnd=1):
        """
        @summary: 释放连接池资源
        """
        if isEnd == 1:
            self.end('commit')
        else:
            self.end('rollback')
        self._cursor.close()
        self._conn.close()


if __name__ == '__main__':
    mysql = MyPymysqlPool("dbMysql")
    sqlAll = "select * from novel limit 1"
    result = mysql.getOne(sqlAll)
    print(result)
    # print(result['title'])
    # print(result['title'].decode('utf-8'))
    # print(result.decode('utf-8'))
    # print(chardet.detect(result['title']))
    data = {
        'no': 1,
        'name': 'Runoob',
        'url': 'http://www.runoob.com'
    }
    json_str = json.dumps(result)
    print(json_str)
    # 释放资源
    mysql.dispose()

Python入门-Python 爬小说存入数据库 （Day4）

准备工作

建表

脚本

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Python入门-Python 爬小说存入数据库（Day4）