java.sql.SQLException:IO 错误:The Network Adapter could not establish the connection启动tomcat项目出现报错,请问该怎么解决

java.sql.SQLException:IO 错误:The Network Adapter could not establish the connection启动tomcat项目出现报错,请问该怎么解决
java.sql.SQLException:IO 错误:The Network Adapter could not establish the connection
启动tomcat项目出现报错,请问该怎么解决

java.sql.SQLException:IO 错误:The Network Adapter could not establish the connection启动tomcat项目出现报错,请问该怎么解决
连接不上,要连什么数据库?
Orale?