使用 Python 从 MySQL 中的 JSON 对象插入多行

Posted 2023-02-24

【中文标题】使用 Python 从 MySQL 中的 JSON 对象插入多行

【英文标题】：insert multiple rows from JSON object in MySQL with Python

【发布时间】：2019-02-25 20:02:07

【问题描述】：

我正在尝试将 JSON 对象中的多行添加到 mysql 中，但只有最后一行添加到数据库中。有没有像“每一行”这样的解决方案？

import requests
import json
import pymysql
import urllib.request

con = pymysql.connect(host = 'host', port = 3306, user = 'user', passwd = 'pass', db = 'db')
cursor = con.cursor()
url = 'url to json'
urllib.request.urlopen(url).read()
response = urllib.request.urlopen(url).read()
json_obj = str(response, 'utf-8')
json_obj = json.loads(response.decode('utf-8'))

for obj in json_obj:
    print(obj["one"])
    print(obj["two"])
    print(obj["three"])
    print(obj["four"])
    print(obj["five"])
    print(obj["six"])
    print(obj["seven"])

cursor.execute("INSERT INTO test (one, two, three, four, five, six, seven) VALUES (%s,%s,%s,%s,%s,%s,%s)", (obj["one"], obj["two"], obj["three"], obj["four"], obj["five"], obj["six"], obj["seven"]))

con.commit()
con.close()

JSON 对象如下所示，一次可以保存 5 到 50 条记录

["one":"1.232.123","two":"test","three":1242,"four":"2,4","five":"test","six":"test","seven":"test","one":"3.322.876","two":"test","three":1312,"four":"3,4","five":"test","six":"test","seven":"test","one":"1.232.123","two":"test","three":1242,"four":"2,4","five":"test","six":"test","seven":"test","one":"3.322.876","two":"test","three":1312,"four":"3,4","five":"test","six":"test","seven":"test"]

【参考方案1】：

cursor.execute 中的缩进错误。 这是固定代码

import requests
import json
import pymysql
import urllib.request

con = pymysql.connect(host = 'host', port = 3306, user = 'user', passwd = 'pass', db = 'db')
cursor = con.cursor()
url = 'url to json'
urllib.request.urlopen(url).read()
response = urllib.request.urlopen(url).read()
json_obj = str(response, 'utf-8')
json_obj = json.loads(response.decode('utf-8'))

for obj in json_obj:
    print(obj["one"])
    print(obj["two"])
    print(obj["three"])
    print(obj["four"])
    print(obj["five"])
    print(obj["six"])
    print(obj["seven"])

    cursor.execute("INSERT INTO test (one, two, three, four, five, six, seven) VALUES (%s,%s,%s,%s,%s,%s,%s)", (obj["one"], obj["two"], obj["three"], obj["four"], obj["five"], obj["six"], obj["seven"]))

con.commit()
con.close()

【参考方案2】：

您应该将INSERT 语句放在for 循环中：

for obj in json_obj:
    print(obj["one"])
    print(obj["two"])
    print(obj["three"])
    print(obj["four"])
    print(obj["five"])
    print(obj["six"])
    print(obj["seven"])

    cursor.execute("INSERT INTO test (one, two, three, four, five, six, seven) VALUES (%s,%s,%s,%s,%s,%s,%s)", (obj["one"], obj["two"], obj["three"], obj["four"], obj["five"], obj["six"], obj["seven"]))