BeanParserServlet.java Source code

Introduction

Here is the source code for BeanParserServlet.java
Source

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.*;
import javax.servlet.http.*;

public class BeanParserServlet extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, java.io.IOException {

        //set the MIME type of the response, "text/html"
        response.setContentType("text/html");

        //use a PrintWriter send text data to the client who has requested the servlet
        java.io.PrintWriter out = response.getWriter();

        //Begin assembling the HTML content
        out.println("<html><head>");

        out.println("<title>Stock Price Fetcher</title></head><body>");
        out.println("<h2>Please submit a valid stock symbol</h2>");

        //make sure method="post" so that the servlet service method
        //calls doPost in the response to this form submit
        out.println("<form method=\"post\" action =\"" + request.getContextPath() + "/stockbean\" >");

        out.println("<table border=\"0\"><tr><td valign=\"top\">");
        out.println("Stock symbol: </td>  <td valign=\"top\">");
        out.println("<input type=\"text\" name=\"symbol\" size=\"10\">");
        out.println("</td></tr><tr><td valign=\"top\">");

        out.println("<input type=\"submit\" value=\"Submit Info\"></td></tr>");
        out.println("</table></form>");
        out.println("</body></html>");

    } //end doGet

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, java.io.IOException {

        String symbol;//this will hold the stock symbol
        float price = 0f;

        symbol = request.getParameter("symbol");

        boolean isValid = (symbol == null || symbol.length() < 1) ? false : true;

        //set the MIME type of the response, "text/html"
        response.setContentType("text/html");

        //use a PrintWriter send text data to the client who has requested the servlet
        java.io.PrintWriter out = response.getWriter();

        //Begin assembling the HTML content
        out.println("<html><head>");
        out.println("<title>Latest stock value</title></head><body>");

        if (!isValid) {
            out.println("<h2>Sorry, the stock symbol parameter was either empty or null</h2>");
        } else {

            out.println("<h2>Here is the latest value of " + symbol + "</h2>");

            StockPriceBean spbean = new StockPriceBean();
            spbean.setSymbol(symbol);
            price = spbean.getLatestPrice();

            out.println((price == 0 ? "The symbol is probably invalid." : "" + price));

        }

        out.println("</body></html>");

        out.close();

    }// doPost

}//HttpServlet