Como corrigir este erro

Front-end
#1 
javax.servlet.ServletException: java.lang.reflect.InvocationTargetException
	org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535)
	org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

root cause

java.lang.reflect.InvocationTargetException
	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:597)
	org.apache.commons.beanutils.PropertyUtils.setSimpleProperty(PropertyUtils.java:1789)
	org.apache.commons.beanutils.BeanUtils.copyProperty(BeanUtils.java:450)
	org.apache.commons.beanutils.BeanUtils.copyProperties(BeanUtils.java:264)
	usuario.action.UsuarioAction.buscar(UsuarioAction.java:83)
	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:597)
	org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
	org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
	org.apache.struts.actions.LookupDispatchAction.execute(LookupDispatchAction.java:150)
	org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

root cause

org.hibernate.LazyInitializationException: could not initialize proxy - no Session
	org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:57)
	org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:111)
	org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:150)
	usuario.bean.Usuario$$EnhancerByCGLIB$$7f11493e.setIdusuario(<generated>)
	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:597)
	org.apache.commons.beanutils.PropertyUtils.setSimpleProperty(PropertyUtils.java:1789)
	org.apache.commons.beanutils.BeanUtils.copyProperty(BeanUtils.java:450)
	org.apache.commons.beanutils.BeanUtils.copyProperties(BeanUtils.java:264)
	usuario.action.UsuarioAction.buscar(UsuarioAction.java:83)
	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:597)
	org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
	org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
	org.apache.struts.actions.LookupDispatchAction.execute(LookupDispatchAction.java:150)
	org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

DAO

public Object buscar(Class clazz, Long pk) throws Exception  
     {  
         
         usuario = (Usuario) sessao.load(clazz,pk);  
         transacao.commit();  
         sessao.flush();  
         sessao.close();  
         return usuario;  
     }

Action

 public ActionForward buscar(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {                                                                         
        
        HttpSession session = request.getSession();
        
        UsuarioForm usuarioForm = (UsuarioForm) form;        
                        
        PersistenciaDAO persistencia = new PersistenciaDAO();     
        Usuario usuario = new Usuario();
        usuario = (Usuario) persistencia.buscar(Usuario.class, usuarioForm.getIdusuario());                
        
        BeanUtils.copyProperties(usuario, usuarioForm);                                
        
        usuarioForm.setNome(usuario.getNome());
        
        return mapping.findForward(SUCCESS);        
                
    }

Pq será que esta dando este erro?

Aguardo a ajuda de vcs :smiley:

#2

As classes UsuarioForm e Usuario não tem todos os valores correspondentes (nomes diferentes)
usuarioForm.setNome()
usuario.setNomeUsuario()

Ps: Estou supondo q vc saiba o que é reflexão.

:smiley:

#3

http://www.guj.com.br/posts/list/23319.java

#4