Probleme de boucle dans servlet
salut,
j'ai une servlet qiu recupere un champ d'un formulaire
Code:
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| package metier;
public class Ftpchoice extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("image/png");
TimeSerie test = new .TimeSerie("");
String choix = request.getParameter("choix");
JFreeChart imagechart;
try {
imagechart = test.dessiner();
OutputStream out = response.getOutputStream();
ChartUtilities.writeChartAsPNG(out, imagechart, 700, 500);
request.setAttribute("image",out);
//request.getRequestDispatcher("Server1.jsp").forward(request, response);
} catch (SQLException e) {
e.printStackTrace();
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
} |
ainsi faire, la servlet marche sans probleme, sauf quand j'essaye de changer le code comme ceci :
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|
public class Ftpchoice extends HttpServlet {
/**
*
*/int i=0;
private static final long serialVersionUID = 1L;
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("image/png");
TimeSerie test = new TimeSerie("");
String choix = request.getParameter("choix");
JFreeChart imagechart;
if(choix=="date")
{
try {
imagechart = test.dessiner();
OutputStream out = response.getOutputStream();
ChartUtilities.writeChartAsPNG(out, imagechart, 700, 500);
request.setAttribute("image",out);
//request.getRequestDispatcher("Server1.jsp").forward(request, response);
} catch (SQLException e) {
e.printStackTrace();
}
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
} |
ca ne marche pas,
