org.springframework.jdbc.UncategorizedSQLException: Hibernate operation: Cannot open connection; uncategorized SQLException for SQL [???]; SQL state [null]; error code [0]; Connections could not be acquired from the underlying database!; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
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- 均AND均 2017-09-13 09:17关注
以上问题可能有一下原因造成:
1,驱动配置有误:driver=com.mysql.jdbc.Driver //oracle则写其对应驱动
2,数据库连接地址有误:url=jdbc:mysql://localhost:3306/test?haracterEncoding=utf8 //oracle则为:url=jdbc:oracle:thin:@localhost:1521:test
3,密码或帐号有误:username=root
password=root
4,数据库未启动或无权访问
5,项目未引入对应的驱动jar包mysql-connector-java-5.1.6-bin.jar
6,mysql root没有远程访问的权限,需要增加权限,增加权限的步骤如下:
进入mysql数据库:
grant all privileges on . to 'root'@'%' identified by 'root' with grant option;
flush privileges;本回答被题主选为最佳回答 , 对您是否有帮助呢?解决 无用评论 打赏 举报