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mysql.py
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260 lines (237 loc) · 6.67 KB
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# coding=utf-8
__author__ = 'zhanghe'
try:
from MySQLdb import *
except ImportError:
from pymysql import *
class Mysql(object):
"""
自定义mysql工具
"""
def __init__(self, db_config, db_name=None):
self.db_config = db_config
if db_name is not None:
self.db_config['db'] = db_name
try:
self.conn = Connection(
self.db_config['host'],
self.db_config['user'],
self.db_config['passwd'],
self.db_config['db'],
self.db_config['port']
)
except Exception, e:
print e
def is_conn_open(self):
"""
检测连接是否打开
:return:
"""
if self.conn is None or self.conn.open == 0:
return False
else:
return True
def close_conn(self):
"""
关闭数据库连接
:return:
"""
if self.is_conn_open() is True:
self.conn.close()
def get_row(self, table_name=None, condition=None):
"""
获取单行数据
:return:
"""
if self.is_conn_open() is False:
print '连接已断开'
return None
try:
cursor = self.conn.cursor()
cursor.execute("set NAMES UTF8") # 解决乱码
if condition is not None:
sql_condition = 'where '
sql_condition += ' and '.join(condition)
else:
sql_condition = ''
sql = 'select * from %s %s limit 1' % (table_name, sql_condition)
print sql
cursor.execute(sql)
row = cursor.fetchone()
if row is None:
print None
return None
else:
# print type(row)
if '??' in row[1]:
print '存在乱码'
print '%s\t%s' % (row[0], row[1])
# print '%s\t%s' % (type(row[0]), type(row[1]))
cursor.close()
return row
except Exception, e:
print e
def get_count(self, table_name=None):
"""
获取记录总数
:return:
"""
if self.is_conn_open() is False:
print '连接已断开'
return None
if table_name is None:
# print 0
return 0
try:
cursor = self.conn.cursor()
sql = 'select count(*) from %s' % table_name
cursor.execute(sql)
row = cursor.fetchone()
count = row[0]
cursor.close()
# print count
return count
except Exception, e:
print e
def get_count_by_sql(self, sql=None):
"""
获取记录总数
:return:
"""
if self.is_conn_open() is False:
print '连接已断开'
return None
if sql is None:
print 'sql语句不能为空'
return None
try:
cursor = self.conn.cursor()
cursor.execute("set NAMES UTF8") # 解决乱码
cursor.execute(sql)
row = cursor.fetchone()
count = row[0]
cursor.close()
# print count
return count
except Exception, e:
print e
def get_rows_by_sql(self, sql=None):
"""
获取记录
:return:
"""
if self.is_conn_open() is False:
print '连接已断开'
return None
if sql is None:
print 'sql语句不能为空'
return None
try:
cursor = self.conn.cursor()
cursor.execute("set NAMES UTF8") # 解决乱码
cursor.execute(sql)
rows = cursor.fetchall()
cursor.close()
# print rows
return rows
except Exception, e:
print e
def delete(self, table_name, condition=None):
"""
删除表记录
"""
if self.is_conn_open() is False:
print '连接已断开'
return None
try:
cursor = self.conn.cursor()
if condition is not None:
sql_condition = 'where '
sql_condition += ' and '.join(condition)
else:
sql_condition = ''
sql = 'delete from %s %s' % (table_name, sql_condition)
print sql
result = cursor.execute(sql)
cursor.close()
self.conn.commit()
return result
except Exception, e:
print e
def insert(self, table_name, data={}):
"""
插入表记录
"""
if self.is_conn_open() is False:
print '连接已断开'
return None
if not data:
return None
try:
cursor = self.conn.cursor()
cursor.execute("set NAMES UTF8") # 解决乱码
sql_keys = ', '.join(str(item) for item in data.keys())
sql_vals = ', '.join("'%s'" % str(item) for item in data.values())
sql = 'insert into %s(%s) values(%s)' % (table_name, sql_keys, sql_vals)
print sql
result = cursor.execute(sql)
cursor.close()
self.conn.commit()
return result
except Exception, e:
print e
def test():
"""
测试Mysql类
:return:
"""
# 本地环境
db_config_local = {
'host': '192.168.1.1',
'user': 'xxxx',
'passwd': 'xxxxxxxx',
'db': '',
'port': 3306
}
# 线上环境
db_config_online = {
'host': '192.168.1.2',
'user': 'xxxx',
'passwd': 'xxxxxxxx',
'db': '',
'port': 3306
}
# 实例化db_company库的连接
mysql_company = Mysql(db_config_local, 'db_company')
# 查询总数
count = mysql_company.get_count('company')
print '总记录数：%s' % count
# 关闭数据库连接
# mysql_company.close_conn()
# 查询单条记录
row = mysql_company.get_row('company', ['cid=17'])
if row is not None:
print '单条记录：%s\t%s' % (row[0], row[1])
else:
print '没有记录'
# 关闭数据库连接(测试再次关闭)
mysql_company.close_conn()
if __name__ == '__main__':
test()
"""
测试结果：
1748901
总记录数：1748901
select * from company where cid=18 limit 1
None
没有记录
1748901
总记录数：1748901
连接已断开
没有记录
1748901
总记录数：1748901
select * from company where cid=17 limit 1
17 四川XXX有限责任公司
单条记录：17 四川XXX有限责任公司
"""