ERROR com.alibaba.druid.pool.DruidDataSource Line:872 - init datasource error, url: jdbc:mysql://localhost:3306/guns?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&useSSL=false&serverTimezone=UTC

===2018-08-06 17:17:58.552 ERROR com.alibaba.druid.pool.DruidDataSource Line:872 - init datasource error, url: jdbc:mysql://localhost:3306/guns?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&useSSL=false&serverTimezone=UTC

java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.

at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:108)

at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95)

at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:87)

at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:61)

at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:71)

at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:932)

at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:857)

at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:444)

at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:230)

at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:226)

at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:156)

at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:218)

at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:150)

at com.alibaba.druid.filter.FilterAdapter.connection_connect(FilterAdapter.java:786)

at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:150)

at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1560)

at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1623)

at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:861)

at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1229)

at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1225)

at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:90)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)

at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:197)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)

at com.alibaba.druid.support.spring.stat.DruidStatInterceptor.invoke(DruidStatInterceptor.java:72)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)

at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)

at com.sun.proxy.$Proxy93.getConnection(Unknown Source)

at com.baomidou.mybatisplus.toolkit.GlobalConfigUtils.setMetaData(GlobalConfigUtils.java:187)

at com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean.buildSqlSessionFactory(MybatisSqlSessionFactoryBean.java:560)

at com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean.afterPropertiesSet(MybatisSqlSessionFactoryBean.java:385)

at com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean.getObject(MybatisSqlSessionFactoryBean.java:608)

at com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration.sqlSessionFactory(MybatisPlusAutoConfiguration.java:147)

at com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration$$EnhancerBySpringCGLIB$$4040d67b.CGLIB$sqlSessionFactory$0(<generated>)

at com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration$$EnhancerBySpringCGLIB$$4040d67b$$FastClassBySpringCGLIB$$5ad2b016.invoke(<generated>)

at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)

at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361)

at com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration$$EnhancerBySpringCGLIB$$4040d67b.sqlSessionFactory(<generated>)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1250)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:541)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501)

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251)

求助啊。我新下的guns导入以后改了配置文件，换成了自己数据库的密码，但是运行就报这个错是这么回事啊