java.lang.IllegalArgumentException

	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

	at java.lang.reflect.Method.invoke(Method.java:601)

	at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:42)

	at org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:329)

	at org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:232)

	at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3557)

	at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:133)

	at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:854)

	at org.hibernate.loader.Loader.doQuery(Loader.java:729)

	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)

	at org.hibernate.loader.Loader.doList(Loader.java:2217)

	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2108)

	at org.hibernate.loader.Loader.list(Loader.java:2103)

	at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94)

	at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1570)

	at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)

	at dao.PostDao.queryPostByIndex(PostDao.java:74)

	at org.apache.jsp.announce_jsp._jspService(announce_jsp.java:88)

	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)

	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)

	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)

	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:593)

	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:530)

	at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:954)

	at org.apache.jsp.index_jsp._jspService(index_jsp.java:334)

	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)

	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)

	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

	at util.EncodingFilter.doFilter(EncodingFilte