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alexandregama/gist:704721

Created November 18, 2010 07:21
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Primeiro exemplo de Servlets - Apostila Caelum
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gistfile1.java
//web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>caelum</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>servletOiMundo</servlet-name>
<servlet-class>br.com.caelum.servlet.OiMundo</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>servletOiMundo</servlet-name>
<url-pattern>/oi</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>AdicionaContato</servlet-name>
<servlet-class>br.com.caelum.agenda.servlet.AdicionaContatoServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>AdicionaContato</servlet-name>
<url-pattern>/adicionaContato</url-pattern>
</servlet-mapping>
<error-page>
<error-code>404</error-code>
<location>/404.html</location>
</error-page>
</web-app>
//Adiciona contato
package br.com.caelum.agenda.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class AdicionaContatoServlet extends HttpServlet{
private static final long serialVersionUID = 1L;
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
String nome = request.getParameter("nome");
String email = request.getParameter("email");
String endereco = request.getParameter("endereco");
Contato contato = new Contato();
contato.setNome(nome);
contato.setEmail(email);
contato.setEndereco(endereco);
ContatoDAO contatoDAO = new ContatoDAO();
contatoDAO.salva(contato);
out.println("<html>");
out.println("<body>");
out.println("Contato adicionado: " + contato.getNome());
out.println("</body>");
out.println("</html>");
}
}
//ContatoDAO
package br.com.caelum.agenda.servlet;
import java.util.ArrayList;
import java.util.List;
public class ContatoDAO {
private List<Contato> contatos = new ArrayList<Contato>();
public void salva(Contato contato) {
contatos.add(contato);
}
}
//Página de erro
<!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>Insert title here</title>
</head>
<body>
Xi, não encontramos sua página!
</body>
</html>
//Formulário principal
<!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>Cadastro de contatos</title>
</head>
<body>
<form action="adicionaContato" method="POST">
Nome: <input type="text" name="nome"/><br/>
Email: <input type="text" name="email"/><br/>
Endereço: <input type="text" name="endereco"/><br/>
<input type="submit" value="Gravar"/>
</form>
</body>
</html>
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