java.sql.SQLException: Access denied for user 'nilm_database'@'localhost' (using password: YES)

java.sql.SQLException: Access denied for user 'nilm_database'@'localhost' (using password: YES) 是一个数据库访问被拒绝的异常。该异常通常是由于使用错误的用户名或密码导致的。根据引用和引用中的内容，可以看出错误的application.yml文件中的用户名应该是'root'而不是'nilm_database'。正确的application.yml文件应该如引用所示，其中的username应该设置为'root'。同时，需要确保在数据库中已经创建了名为'root'的用户，并且指定的密码正确匹配。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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