springboot打包部署问题

[qq_38842654]

SpringBoot项目打包部署到linux环境的服务器上，访问报数据库连接错误（sqlserver数据库），数据库名称，密码，路径都没问题。数据库配置代码：

spring.datasource.url = jdbc:sqlserver://localhost:1433;DatabaseName=jiyudb
spring.datasource.username =
spring.datasource.password =
spring.datasource.driverClassName = com.microsoft.sqlserver.jdbc.SQLServerDriver

报错代码：

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Wed Jan 10 14:57:37 CST 2018
There was an unexpected error (type=Internal Server Error, status=500).
nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database! ### The error may exist in com/yva/dao/UserDao.java (best guess) ### The error may involve com.yva.dao.UserDao.checkLogin ### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!

请各位大神指点！！！