大家帮我看看这个是什么错,我实在找不出了

Question

javax.servlet.ServletException: java.lang.IllegalArgumentException: id to load is required for loading
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:520)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:427)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
root cause java.lang.IllegalArgumentException: id to load is required for loading
org.hibernate.event.LoadEvent.<init>(LoadEvent.java:74)
org.hibernate.event.LoadEvent.<init>(LoadEvent.java:56)
org.hibernate.impl.SessionImpl.get(SessionImpl.java:839)
org.hibernate.impl.SessionImpl.get(SessionImpl.java:835)
com.chao98.service.imp.CategoryService.getCategoryById(CategoryService.java:29)

Answer 1

如果要测试你的jsp文件是否正确的话，可以传递一个参数来测试。如在URL传递一个参数来测试:你的JSP页面的路径?testProject=1，这样就不会再出现
id to load is required for loading

Answer 2

id to load is required for loading。楼主难道用了jquery，我也碰到过类似的情况，就是jquery里的id没有值。

Answer 3

是用的hibernate？配置文件自动增长列错了吧 。