1：项目Spring版本升级之后，服务启动有如下报错：

六月 02, 2018 5:51:49 下午 org.apache.catalina.core.ApplicationContext log
严重: StandardWrapper.Throwable
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.validation.beanvalidation.OptionalValidatorFactoryBean#0': Invocation of init method failed; nested exception is java.lang.AbstractMethodError: org.apache.bval.jsr303.ConfigurationImpl.getDefaultParameterNameProvider()Ljavax/validation/ParameterNameProvider;at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:171)at javax.servlet.GenericServlet.init(GenericServlet.java:158)at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1188)at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1132)at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1021)at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5046)at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5356)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.AbstractMethodError: org.apache.bval.jsr303.ConfigurationImpl.getDefaultParameterNameProvider()Ljavax/validation/ParameterNameProvider;at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:216)at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:201)at org.springframework.validation.beanvalidation.LocalValidatorFactoryBean.configureParameterNameProviderIfPossible(LocalValidatorFactoryBean.java:315)at org.springframework.validation.beanvalidation.LocalValidatorFactoryBean.afterPropertiesSet(LocalValidatorFactoryBean.java:284)at org.springframework.validation.beanvalidation.OptionalValidatorFactoryBean.afterPropertiesSet(OptionalValidatorFactoryBean.java:40)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)... 28 more

经排查，原来是Spring 4.x版本已经不支持org.apache.bval的bean验证了，替换为hibernate-validator就好了，pom如下：

<dependency>  <groupId>org.hibernate</groupId>  <artifactId>hibernate-validator</artifactId>  <version>5.2.4.Final</version>  
</dependency>