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)

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