MySQL连接断开后如何自动重连

要实现MySQL连接断开后的自动重连，您可以使用编程语言（如Python、Java等）来实现。这里我将为您提供一个Python示例，展示如何在连接断开后自动重新连接到MySQL数据库。

首先，确保已安装mysql-connector-python库。如果尚未安装，请使用以下命令进行安装：

pip install mysql-connector-python

接下来，创建一个Python脚本并添加以下代码：

import mysql.connector
from mysql.connector import Error
import time

def create_connection():
    connection = None
    try:
        connection = mysql.connector.connect(
            host="your_host",
            user="your_user",
            password="your_password",
            database="your_database"
        )
        print("Connection to MySQL DB successful")
    except Error as e:
        print(f"The error '{e}' occurred")

    return connection

def execute_query(connection, query):
    cursor = connection.cursor()
    try:
        cursor.execute(query)
        connection.commit()
        print("Query executed successfully")
    except Error as e:
        print(f"The error '{e}' occurred")

def main():
    connection = create_connection()

    while True:
        if not connection.is_connected():
            print("Connection lost, reconnecting...")
            connection = create_connection()
        else:
            # Replace this with your own query
            query = "SELECT * FROM your_table"
            execute_query(connection, query)

        time.sleep(5)  # Wait for 5 seconds before the next iteration

if __name__ == "__main__":
    main()

请确保将your_host、your_user、your_password和your_database替换为您的MySQL数据库的实际凭据。此外，根据需要更改your_table和查询。

这个脚本会每隔5秒执行一次查询。如果连接断开，它会尝试重新连接。如果连接成功，它将继续执行查询。您可以根据需要调整时间间隔和查询。