出现这个报错的话，请大家注意yml中的配置

spring:

datasource:

    url: jdbc:oracle:thin:@

    username:

password:

    driver-class-name:oracle.jdbc.OracleDriver

    filters: stat

maxActive: 20

initialSize: 1

maxWait: 60000

minIdle: 1

timeBetweenEvictionRunsMillis: 60000

minEvictableIdleTimeMillis: 300000

validationQuery: select 'x' from dual      //关键是这一行  mysql的话是select ‘x’ oracle则是select ‘x’ from dual

testWhileIdle: true

testOnBorrow: false

testOnReturn: false

poolPreparedStatements: true

maxOpenPreparedStatements: 20