[es] - Servlet i prenos podataka

stevan314
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^{07.04.2015. u 19:43 - pre 110 meseci}

Imam problem sa prenosom podataka sa forme u servlet, sve je lepo radilo do danas, prosto upisem ime i prezime i na servletu se prikazu upisani podaci
medjutim sad mi prikazuje HTTP Status 500.

Ovo je code iz WebContent/inputOsoba.html

Code:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Primer sa formom</title>
</head>
<body>
<h1>Unesite podatke</h1>
<form action="UpisUListu" method="get">
<p>
Ime: <input type="text" name="ime"/>
<br/>
Prezime: <input type="text" name="prezime"/>
</p>
<input type="submit" value="Posalji ">
</form>
</body>
</html>

Code iz paketa u kojem se nalazi servlet- servlet se zove UpisUListu.java (popunjavao sam samo doGet metodu)

Code:

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        String ime=request.getParameter("ime");
        String prezime=request.getParameter("prezime");
        osoba=new Osoba();
        osoba.setIme(ime);
        osoba.setIme(prezime);
        osobe.add(osoba);
        getServletContext().setAttribute("osobe", osobe);
        response.setContentType("text/html");
        PrintWriter pout=response.getWriter();
        pout.println("<html>");
        pout.println("<body>");
        pout.println("<h1>Vas unos:</h1>");
        pout.println("Ime: "+ime+"<br/>");
        pout.println("Prezime: "+prezime+"<br/>");
        pout.println("<a href=\"ShowDataFromListServeltContex\">Prkazi Listu</a>");
        pout.println("</body></html>");
        pout.close();
    }

i naravno web.xml

Code:

<?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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>Testing</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>
    <description></description>
    <display-name>UpisUListu</display-name>
    <servlet-name>UpisUListu</servlet-name>
    <servlet-class>example04.UpisUListu</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>UpisUListu</servlet-name>
    <url-pattern>/UpisUListu</url-pattern>
  </servlet-mapping>

</web-app>

Kad lepo kliknem na send u formi dobijem sledeci ispis na ekranu:

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error that prevented it from fulfilling this request.

exception

java.lang.NullPointerException
javax.servlet.GenericServlet.getServletContext(GenericServlet.java:123)
example04.UpisUListu.doGet(UpisUListu.java:50)
javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

note The full stack trace of the root cause is available in the Apache Tomcat/8.0.18 logs.

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