异常 -- Spring Boot_Access denied for user ''@'192.168.137.1' (using password: NO)

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昨天回家继续写SpringBoot的样例Demo，搞数据库的时候，死活连接不上去，抛出如下异常：

java.sql.SQLException: Access denied for user ''@'192.168.137.1' (using password: NO)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3976)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3912)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:871)
	at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4427)
	at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1276)
	at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2190)
	at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2221)
	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2016)

后来，仔细对比了一下，之前写的Demo代码，发现配置文件中，写错了....

将：

spring.datasource.data-username=root
spring.datasource.data-password=root

换成：

spring.datasource.username=root
spring.datasource.password=root

替换之后，就可以了...