Tomcat].[localhost] : Exception Processing ErrorPage[errorCode=0, location=/error]

错误

2018-12-30 17:07:07.088 ERROR 6268 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost]           : Exception Processing ErrorPage[errorCode=0, location=/error]

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1013) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.13.jar:9.0.13]

原因

组成主键是有一为空了，

     Locale locale = Locale.getDefault();