jdbc:mysql://127.0.0.1:3306/db?characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false&allowPublicKeyRetrieval=true&serverTimezone=Asia/Shanghai&keepAlive=true&autoReconnect=true&autoReconnectForPools=true&connectTimeout=30000&socketTimeout=60000
或者设置 mysql的超时时间
connectTimeout
socketTimeout
