修改保存文章时出错，出错信息： type Exception report message  description The server encountered an internal error () that prevented it from fulfilling this request. exception  java.lang.NullPointerException com.jeecms.article.manager.impl.ArticleMngImpl.addAttachment(Unknown Source) com.jeecms.article.manager.impl.ArticleMngImpl.updateArticle(Unknown Source) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307) org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149) org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) $Proxy45.updateArticle(Unknown Source) com.jeecms.article.action.ArticleAct.update(Unknown Source) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:440) com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:279) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242) com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:163) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236) com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:249) org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236) com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236) org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236) com.jeecms.common.struts2.interceptor.DomainNameInterceptor.doIntercept(Unknown Source) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236) com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236) com.jeecms.common.struts2.interceptor.ProcessingStartInterceptor.intercept(Unknown Source) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236) org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:532) org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395) com.jeecms.core.web.AccessControlFilter.doFilter(Unknown Source) org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) note The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs.

感谢你的使用信息反馈
我们会进快收集这些存在的问题，到时会发布个修正的版本

自己跟踪了下，估计是你们测试完后没注销System.out.println(uploadFiles.size());导致了空指针；注销了就行了
com.jeecms.article.manager.impl.ArticleMngImpl.addAttachment()
/**
 * 新增附件
 * 
 * @param entity
 * @param rule
 * @param web
 * @param user
 */
private void addAttachment(Article entity, UploadRule rule, User user,
CmsMember member) {
Website web = entity.getWebsite();
Map<String, UploadFile> uploadFiles = rule.getUploadFiles();
// System.out.println(uploadFiles.size());
if (uploadFiles != null) {
String content = entity.getContent();
String titleImg = entity.getTitleImg();
String contentImg = entity.getContentImg();
Set<String> rmFile = new HashSet<String>();
Attachment attach;