解决办法：把基本类型改为对象，譬如此处将pageId的类型由int 改为Integer
2016-10-19 19:36:11.275 DEBUG [http-nio-9999-exec-2][org.springframework.web.servlet.DispatcherServlet] Last-Modified value for [/user/1/detail] is: -1 2016-10-19 19:36:11.278 DEBUG [http-nio-9999-exec-2][org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod] Error resolving argument [1] [type=int] HandlerMethod details: Controller [com.rest.RestTemplateDemo] Method [public com.rest.Result com.rest.RestTemplateDemo.getPathVariableAndRequestParameter(java.lang.String,int,int)] java.lang.IllegalStateException: Optional int parameter 'pageId' is present but cannot be translated into a null value due to being declared as a primitive type.
Consider declaring it as object wrapper for the corresponding primitive type. at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.handleNullValue(AbstractNamedValueMethodArgumentResolver.java:205) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:98) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:77) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:162) [spring-web-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:129) [spring-web-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:111) [spring-webmvc-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:799) [spring-webmvc-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:728) [spring-webmvc-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) [spring-webmvc-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) [spring-webmvc-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:969) [spring-webmvc-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:860) [spring-webmvc-4.2.0.RC1.jar:4.2.0.RC1] at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:845) [spring-webmvc-4.2.0.RC1.jar:4.2.0.RC1] at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.0.23.jar:8.0.23] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.23.jar:8.0.23] at com.global.filter.RewriteServletPathFilter.doFilter(RewriteServletPathFilter.java:25) [classes/:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.23.jar:8.0.23] at com.global.filter.AddExtraToParamsFilter.doFilter(AddExtraToParamsFilter.java:33) [classes/:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) [spring-web-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.0.RC1.jar:4.2.0.RC1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85) [spring-web-4.2.0.RC1.jar:4.2.0.RC1] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.0.RC1.jar:4.2.0.RC1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521) [tomcat-embed-core-8.0.23.jar:8.0.23] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478) [tomcat-embed-core-8.0.23.jar:8.0.23] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_60] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_60] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.0.23.jar:8.0.23] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_60] 2016-10-19 19:36:11.280 DEBUG [http-nio-9999-exec-2][org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver] Resolving exception from handler [public com.rest.Result com.rest.RestTemplateDemo.getPathVariableAndRequestParameter(java.lang.String,int,int)]: java.lang.IllegalStateException: Optional int parameter 'pageId' is present but cannot be translated into a null value due to being declared as a primitive type. Consider declaring it as object wrapper for the corresponding primitive type. 2016-10-19 19:36:11.281 DEBUG [http-nio-9999-exec-2][org.springframework.beans.factory.support.DefaultListableBeanFactory] Returning cached instance of singleton bean 'exceptionHandleAdvice'