解决： Caused by: java.lang.IllegalStateException: Cannot load driver class: com.mysql.jdbc.Driver

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1. 报错：

Caused by: java.lang.IllegalStateException: Cannot load driver class: com.mysql.jdbc.Driver

2.但是，我的pom.xml中明明已经引用了：

       <dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency>

3. 网上找了各种类似的文章依然没有能够解决问题，直到看到这个文章
Cannot load driver class: com.mysql.jdbc.Driver with Gradle and Spring Boot

4. 我就尝试着把配置文件中这个驱动配置注释掉了，再次启动竟然不报错了！

# 驱动配置信息
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url=jdbc:mysql://localhost/xxx?useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=xxx# 注释掉这一行
#spring.datasource.driver-class-name=com.mysql.jdbc.Driver

我就怀疑是不是这个配置有问题了，最后发现就是后面留有空格，去掉空格重新放开，再启动工程，就好了！

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解决： Caused by: java.lang.IllegalStateException: Cannot load driver class: com.mysql.jdbc.Driver

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