1
I’m a beginner in Javaweb development. I’m using Java version 11 and Tomcat version 9.0.
When using the annotation @WebServlet(urlPatterns) in the classes OiMundoServlet.java and NovaEmpresaServlet.java, the following error message appears when calling Urls http://localhost:8080/gerenciador/oi and http://localhost:8080/gerenciador/novaEmpresa:
"HTTP Status 404 – Não Encontrado
Type Status Report
Message The requested resource [/gerenciador/novaEmpresa] is not available
Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.
Apache Tomcat/9.0.41"
I ask for help to be able to solve the problem, to make that when calling the Urls in the browser the content is shown.
NOTE: When I call the url http://localhost:8080/gerenciador/bem-vindo.html the content is perfectly shown in the browser.
Below are the classes, file html and the web.xml:
package br.com.alura.gerenciador.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(urlPatterns = "/oi")
public class OiMundoServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws IOException {
PrintWriter out = resp.getWriter();
out.println("<html>");
out.println("<body>");
out.println("oi mundo, parabens vc escreveu o primeiro servlets.");
out.println("</body>");
out.println("</html>");
System.out.println("O Servlet OiMundoServlet foi chamado");
}
}
package br.com.alura.gerenciador.servlet;
import java.io.IOException;
import java.io.PrintWriter;
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(urlPatterns = "/novaEmpresa")
public class NovaEmpresaServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("Cadastrando nova empresa");
PrintWriter out = response.getWriter();
out.println("<html><body>Empresa Cadastrada com sucesso!</body></html>");
}
}
welcome.html
<html>
<body>
<p>Bem vindos ao curso de Servlets da Alura.</p>
</body>
</html>
web xml.
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="4.0" id="WebApp_ID"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
metadata-complete = "true"
>
<display-name>gerenciador</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>
</web-app>
looking at it like this, I realized that your service method within the company is not annotated with @override, but there must be more going around...
– Lucas Miranda
Little grasshopper, doing a hello world on Tomcat work is an old classic Java Web programming and adds a lot to your knowledge. In golden times it was necessary to declare its classes associated with the respective URL Patterns in the web.xml file. With the advent of the Annotations I do not know if this is still necessary today. Tips: Web application running as Tomcat root application is different from non-root application. Absolute path (http://localhost...) is different from relative (manager/novaPress) which is different from relative root absolute (/manager...). Good luck.
– Piovezan