我的 lista-dados.jsp 有问题： 我的 Servlet：
package br.com.cad.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import br.com.cad.basica.Contato;
import br.com.cad.dao.ConsultaDados;
public class PesquisaCPF extends HttpServlet{
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException{
HttpSession session = request.getSession();
Contato user = null;
String cpf = request.getParameter("cpf");
System.out.println(cpf);
try {
ConsultaDados dao = new ConsultaDados();
user = dao.getContato(cpf);
}
catch ( Exception e ){
System.out.println(e.getMessage());
}
if ( user == null ) {
session.invalidate();
request.setAttribute("msg", "CPF não encontrado");
request.getRequestDispatcher("checa.jsp" ).forward(request, response);
}
else{
session.setAttribute("user", user);
request.getRequestDispatcher("checa.jsp" ).forward(request, response);
}
}
}
我的道：
package br.com.cad.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import br.com.cad.basica.Contato;
public class ConsultaDados extends ConnectDb{
public Contato getContato(String cpf ){
Connection c = this.getConnection();
PreparedStatement ps = null;
ResultSet rs = null;
try{
ps = c.prepareStatement("select * from dados_cadastro where pf_cpf = ?");
ps.setString(1, cpf);
rs = ps.executeQuery();
if ( rs.next() ){
Contato user = new Contato();
user.setEmail(rs.getString("pf_email"));
user.setSenha(rs.getString("pf_senha"));
user.setNome( rs.getString("pf_nome") );
user.setSobrenome( rs.getString("pf_ultimonome") );
user.setCpf( rs.getString("pf_cpf") );
user.setRg( rs.getString("pf_rg") );
//user.setDataNascimento("pf_dt_nasc");
user.setTelefone( rs.getString("pf_telefone") );
user.setCelular( rs.getString("pf_celular") );
user.setSexo( rs.getString("pf_sexo") );
user.setEndereco( rs.getString("pf_endereco") );
user.setBairro( rs.getString("pf_bairro") );
user.setCidade( rs.getString("pf_cidade") );
user.setEstado( rs.getString("pf_estado") );
user.setSangue( rs.getString("pf_sangue") );
user.setAlergia( rs.getString("pf_alergia") );
user.setCirurgia( rs.getString("pf_cirugia") );
user.setDiabete( rs.getString("pf_diabete") );
user.setSoropositivo( rs.getString("pf_soro_positivo") );
return user;
}
}
catch (SQLException e){
e.printStackTrace();
}
finally{
if (rs != null ) {
try { rs.close(); } catch (SQLException e) { ; }
rs = null;
}
if (ps != null ) {
try { ps.close(); } catch (SQLException e) { ; }
ps = null;
}
if (c != null ) {
try { c.close(); } catch (SQLException e) { ; }
c = null;
}
}
return null;
}
}
我有一个网络表单来查看特定数据：
<body>
<form action="lista-dados.jsp" method="POST">
<label for="cpf">Busque o CPF</label>
<br>
<input type="text" id="cpf" required name="cpf">
<button type="submit">Consultar</button><...>
我的 lista-dados.jsp：
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="br.com.cad.servlet.PesquisaCPF,br.com.cad.dao.ConsultaDados" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html lang="pt-BR">
<head>
<meta charset="utf-8" />
<title>Insert title here</title>
</head>
<body>
<jsp:useBean id="dao" class="br.com.cad.dao.ConsultaDados"/>
<table>
${dao.cpf}
<tr>
<td>${user.nome}</td>
<td>${user.email}</td>
<td>${user.endereco}</td>
</tr>
</table>
</body>
</html>
我可以通过 servlet 登录我的 home.jsp。我对我的 lista-dados.jsp 有一些疑问，当我输入 cpf 编号并按下提交按钮时，我得到了错误：
exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /lista-dados.jsp at line 17
14:
15: <table>
16:
17: ${dao.cpf}
18: <tr>
19: <td>${user.nome}</td>
20: <td>${user.email}</td>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
root cause
javax.el.PropertyNotFoundException: Property 'cpf' not found on type br.com.cad.dao.ConsultaDados
javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:237)
javax.el.BeanELResolver$BeanProperties.access$400(BeanELResolver.java:214)
javax.el.BeanELResolver.property(BeanELResolver.java:325)
javax.el.BeanELResolver.getValue(BeanELResolver.java:85)
org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:104)
org.apache.el.parser.AstValue.getValue(AstValue.java:183)
org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:185)
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:1026)
org.apache.jsp.lista_002ddados_jsp._jspService(lista_002ddados_jsp.java:85)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)