用Python将mysql数据导出成json的方法

1、相关说明

此脚本可以将Mysql的数据导出成Json格式，导出的内容可以进行select查询确定。

数据传入参数有：dbConfigName, selectSql, jsonPath, fileName。

依赖的库有：MySQLdb、json，尤其MySQLdb需要事先安装好。

2、Python脚本及测试示例

/Users/nisj/PycharmProjects/BiDataProc/oldPythonBak/mysqlData2json.py

# -*- coding=utf-8 -*-
import MySQLdb
import warnings
import datetime
import sys
import json
reload(sys)
sys.setdefaultencoding('utf8')

warnings.filterwarnings("ignore")

mysqlDb_config = {
 'host': 'MysqlHostIp',
 'user': 'MysqlUser',
 'passwd': 'MysqlPass',
 'port': 50512,
 'db': 'Tv_event'
}

today = datetime.date.today()
yesterday = today - datetime.timedelta(days=1)
tomorrow = today + datetime.timedelta(days=1)

def getDB(dbConfigName):
 dbConfig = eval(dbConfigName)
 try:
   conn = MySQLdb.connect(host=dbConfig['host'], user=dbConfig['user'], passwd=dbConfig['passwd'],
               port=dbConfig['port'])
   conn.autocommit(True)
   curr = conn.cursor()
   curr.execute("SET NAMES utf8");
   curr.execute("USE ％s" ％ dbConfig['db']);

return conn, curr
 except MySQLdb.Error, e:
   print "Mysql Error ％d: ％s" ％ (e.args[0], e.args[1])
   return None, None

def mysql2json(dbConfigName, selectSql, jsonPath, fileName):
 conn, curr = getDB(dbConfigName)
 curr.execute(selectSql)
 datas = curr.fetchall()
 fields = curr.description

column_list = []
 for field in fields:
   column_list.append(field[0])

with open('{jsonPath}{fileName}.json'.format(jsonPath=jsonPath, fileName=fileName), 'w+') as f:
   for row in datas:
     result = {}
     for fieldIndex in range(0, len(column_list)):
       result[column_list[fieldIndex]] = str(row[fieldIndex])
     jsondata=json.dumps(result, ensure_ascii=False)
     f.write(jsondata + '\n')
 f.close()

curr.close()
 conn.close()

# Batch Test
dbConfigName = 'mysqlDb_config'
selectSql = "SELECT uid,name,phone_num,qq,area,created_time FROM match_apply where match_id = 83 order by created_time desc;"
jsonPath = '/Users/nisj/Desktop/'
fileName = 'mysql2json'
mysql2json(dbConfigName, selectSql, jsonPath, fileName)

来源：https://blog.csdn.net/BabyFish13/article/details/75040144