学习遇到问题求助

Question

ERROR com.naiveeztAdmin.common.SpringExceptionResolver - unknown json exception, url:http://localhost:8081/naiveeztAdmin/Test/validate.jsonorg.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.NoClassDefFoundError: javax/validation/Validation at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:982) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)