Erro ao utilizar DisplayTag [RESOLVIDO]

Front-end
#1

Olá Galera,

Estou tentando preencher um DisplayTag, mas não esta funcionando. Alguém pode dar uma ajuda ? Esta dando erro no redirecionamento da pagina ainda…

Classe ListaContato:


package br.com.anderson.mvc.logica;

import java.io.IOException;



import java.sql.Connection;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import br.com.anderson.conexao.ContatoDAO;
import br.com.anderson.modelo.Contato;


public class ListaContato implements Logica {

	
	@Override
	public void executa(HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
		Connection connection = (Connection) request.getAttribute("connection");
		ContatoDAO dao = new ContatoDAO(connection);
		
		
		List<Contato> contatos = dao.getLista();
		
		request.setAttribute("lista", contatos);	
					
		RequestDispatcher rd = request
				.getRequestDispatcher("/listateste.jsp");
		try {
			rd.forward(request, response);
		} catch (ServletException | IOException e) {
			System.out.println("erro ao redirecionar");
			e.printStackTrace();
		}

	}

}

Classe DAO:

public List<Contato> getLista() throws SQLException, ParseException {

		// Cria select

		String sql = "select * from tb_contatos";
		List<Contato> contatos = new ArrayList<Contato>();
		PreparedStatement stmt = this.connection.prepareStatement(sql);

		ResultSet rs = stmt.executeQuery();

		try {

			while (rs.next()) {

				// Pega informações da linha do select
				Contato contato = new Contato();
				contato.setNome(rs.getString("nm_contato"));
				contato.setEmail(rs.getString("email_contato"));
				contato.setEndereco(rs.getString("end_contato"));
				contato.setData(rs.getDate("data_contato"));
				contato.setId(rs.getInt("id_contato"));
				contatos.add(contato);

			}

			rs.close();
			stmt.close();

			return contatos;

		} catch (Exception e) {

			System.out.println("Erro ao executar o ContatoDAO - LISTA");
			throw new RuntimeException(e);
		} finally {

			this.connection.close();
		}

	}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://displaytag.sf.net" prefix="display" %>    
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Lista</title>
</head>
<body>

Lista:

  	<display:table name="lista">  
           <display:column property="nome" title="Nome" />
            <display:column property="email" title="Email" /> 
             <display:column property="endereco" title="Endereco" /> 
              <display:column property="data" title="Data" /> 
              <display:column property="id" title="Id" /> 
     </display:table>  
 

</body>
</html>

Erro do console:

Conectando ao banco…
Mai 11, 2012 2:44:19 PM org.apache.catalina.core.ApplicationDispatcher invoke
Grave: Servlet.service() for servlet jsp threw exception
java.lang.ClassNotFoundException: org.apache.commons.lang.UnhandledException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2404)
at java.lang.Class.getConstructor0(Class.java:2714)
at java.lang.Class.newInstance0(Class.java:343)
at java.lang.Class.newInstance(Class.java:325)
at com.sun.beans.finder.InstanceFinder.instantiate(InstanceFinder.java:96)
at com.sun.beans.finder.InstanceFinder.find(InstanceFinder.java:66)
at java.beans.Introspector.findExplicitBeanInfo(Introspector.java:436)
at java.beans.Introspector.(Introspector.java:386)
at java.beans.Introspector.getBeanInfo(Introspector.java:161)
at org.apache.jasper.compiler.Generator$TagHandlerInfo.(Generator.java:3943)
at org.apache.jasper.compiler.Generator$GenerateVisitor.getTagHandlerInfo(Generator.java:2209)
at org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1640)
at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1539)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:475)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
at org.apache.jasper.compiler.Generator.generate(Generator.java:3489)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:250)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
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.processRequest(ApplicationDispatcher.java:471)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)
at br.com.anderson.mvc.logica.ListaContato.executa(ListaContato.java:37)
at br.com.anderson.mvc.servlet.ControllerServlet.doPost(ControllerServlet.java:22)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
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 br.com.anderson.filtro.FiltroTempoDeExecucao.doFilter(FiltroTempoDeExecucao.java:27)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at br.com.anderson.filtro.FiltroConexao.doFilter(FiltroConexao.java:29)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)

erro ao redirecionar
javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/commons/lang/UnhandledException
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:343)
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.processRequest(ApplicationDispatcher.java:471)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)
at br.com.anderson.mvc.logica.ListaContato.executa(ListaContato.java:37)
at br.com.anderson.mvc.servlet.ControllerServlet.doPost(ControllerServlet.java:22)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
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 br.com.anderson.filtro.FiltroTempoDeExecucao.doFilter(FiltroTempoDeExecucao.java:27)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at br.com.anderson.filtro.FiltroConexao.doFilter(FiltroConexao.java:29)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/lang/UnhandledException
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2404)
at java.lang.Class.getConstructor0(Class.java:2714)
at java.lang.Class.newInstance0(Class.java:343)
at java.lang.Class.newInstance(Class.java:325)
at com.sun.beans.finder.InstanceFinder.instantiate(InstanceFinder.java:96)
at com.sun.beans.finder.InstanceFinder.find(InstanceFinder.java:66)
at java.beans.Introspector.findExplicitBeanInfo(Introspector.java:436)
at java.beans.Introspector.(Introspector.java:386)
at java.beans.Introspector.getBeanInfo(Introspector.java:161)
at org.apache.jasper.compiler.Generator$TagHandlerInfo.(Generator.java:3943)
at org.apache.jasper.compiler.Generator$GenerateVisitor.getTagHandlerInfo(Generator.java:2209)
at org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1640)
at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1539)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:475)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
at org.apache.jasper.compiler.Generator.generate(Generator.java:3489)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:250)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
… 33 more
Tempo da requisição de /myportal/controller demourou (ms): 103
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.UnhandledException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
… 61 more

Estou utilizando o displaytag-1.2.jar que esta na pasta web-inf\lib

Vlw !!!

#2

Vc colocou todas as bibliotecas necessárias?

A mensagem diz que não conseguiu encontrar todas as dependências necessárias:
javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/commons/lang/UnhandledException

#3

Notei isto também, porém nunca utilizei o displaytag.

Eu coloquei o jar na WEB-INF\lib\displaytag-1.2.jar. No eclipse ele aparece normal dentro da pasta.

Se eu retirar a parte do displaytag do código da página “listateste.jsp” ela funcionar normal.

Quando eu adiciono a parte:

<display:table name=“lista”>
<display:column property=“nome” title=“Nome” />
<display:column property=“email” title=“Email” />
<display:column property=“endereco” title=“Endereco” />
<display:column property=“data” title=“Data” />
<display:column property=“id” title=“Id” />
</display:table>

Ai gere esses erros e a pagina não exibe nada.

Tem mais algum lugar que eu tenho que colocar a displaytag-1.2.jar ?

#4

Quanto a isso não sei te falar.

Você pode baixar um jar que contenha aquela classe e ver se roda numa boa. [=

#5

Vou tentar !!!

Enquanto não consigo resolver com o displaytag, teria algum jeito para eu montar no JSP mesmo ? Como eu faço um foreach para esta lista ? Tem como ?

Serial algo como ? Porque desse jeito não funcionou :frowning: !!!

<c:forEach var=“contato” items="${param.lista}" varStatus=“id”>


${contato.id}
${contato.nome}
${contato.endereco}
</c:forEach>
#6

Consegui utilizar a displaytag !!! Logo mais posto como fiz !!!

Estava faltando as dependências !!!

#7