最近在使用springboot时报了个错Failed to bind properties under '' to com.zaxxer.hikari.Hikari DataSource，经过分析和排查，最终将处理办法记录下来，并分享给大家。

问题描述

在使用 Spring Boot 连接 MySQL 或其他数据库时，出现以下错误:

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APPLICATION FAILED TO START
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Description:
Failed to bind properties under '' to com.zaxxer.hikari.HikariDataSource:
    Property: driverclassname
    Value: null
    Origin: "driverClassName" from property source "source"
    Reason: Property 'driverClassName' threw exception; nested exception is java.lang.IllegalArgumentException: Could not load JDBC driver class [null]
    Property: url
    Value: null
    Origin: "url" from property source "source"
    Reason: Property 'url' threw exception; nested exception is java.lang.IllegalArgumentException: url is required.
    Property: username
    Value: null
    Origin: "username"