Recebendo dados de um formulário HTML com Servlets | Alura Cursos Online


<!DOCTYPE html> 
<html> 
<head> 
<meta charset="UTF-8"> 
<title>Cadastro de livro</title> 
</head>
<body>
 <fieldset> <legend>Formulário de cadastro de livros</legend> 
 <form> 
  <label>Livro</label> <input type="text" /> 
  <label>Autor</label> <input type="text" /> 
  <label>ISBN</label> <input type="text" /> 
  <label>Valor</label> <input = =/> 
  Data da compra  
  Cadastrar


@Override 
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException 
{
req.getRequestDispatcher("WEB-INF/formulario.html").forward(req, resp); 
}


<?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" 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>minha-biblioteca</display-name>
<servlet> <servlet-name>Main Servlet</> br.com.caelum.alura.biblioteca.servlet.MainServlet   Formulario Servlet br.com.caelum.alura.biblioteca.servlet.FormularioServlet 
 Main Servlet / 
 Formulario Servlet /formulario 
 index.html index.htm index.jsp default.html default.htm default.jsp


package br.com.caelum.alura.biblioteca.servlet;
import java.io.IOException;
import javax.servlet.ServletException; 
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse;
@WebServlet(name="/cadastro") public class CadastroServlet extends HttpServlet {
@Override 
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { }
}


@WebServlet(name="Cadastro Servlet", urlPatterns="/cadastro") public class CadastroServlet extends HttpServlet {
@Override 
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
}
}


<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Cadastro de livro</title> </head> <body>
<fieldset> <legend>Formulário de cadastro de livros</legend> <form action="http://localhost:8080/minha-biblioteca/cadastro"> <label>Livro</label> <input type="text" name="nome" /> <>Autor  ISBN  Valor  Data da compra  Cadastrar


@Override 
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { 
PrintWriter writer = resp.getWriter(); writer.println("página de cadastro acessada");
String nome = req.getParameter("nome");
String autor = req.getParameter("autor"); 
String isbn = req.getParameter("isbn"); 
String valor = req.getParameter("valor"); 
String data = req.getParameter("data");
}


String nome = req.getParameter("nome"); 
String autor = req.getParameter("autor"); 
String isbn = req.getParameter("isbn"); 
String valor = req.getParameter("valor"); 
String data = req.getParameter("data");
writer.println("<ul>"); 
writer.println("<li>nome: " + nome + "</li>"); 
writer.println("<li>autor: " + autor + "</li>"); 
writer.println("<li>isbn: " + isbn + "</li>"); 
writer.println("<li>valor: " + valor + "</li>"); 
writer.println("<li>data: " + data + "</li>"); 
writer.println("</ul>");

Recebendo dados de um formulário HTML com Servlets | Alura Cursos Online