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ServletFormReadAllParam Project Dir Structure
import java.io.IOException; import java.io.PrintWriter; import java.util.Map; import java.util.Set; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class ReadAllParamsServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void init() { System.out .println("-----------------------------------------------------"); System.out .println("init method has been called and servlet is initialized"); System.out .println("-----------------------------------------------------"); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); String title = "Reading All Form Parameters"; String docType = "<!doctype html public \"-//w3c//dtd html 4.0 " + "transitional//en\">\n"; out.println(docType + "<html>\n" + "<head><title>" + title + "</title></head>\n" + "<body bgcolor=\"#f0f0f0\">\n" + "<h1 align=\"center\">" + title + "</h1>\n" + "<table width=\"100%\" border=\"1\" align=\"center\">\n" + "<tr bgcolor=\"#949494\">\n" + "<th>Param Name</th><th>Param Value(s)</th>\n" + "</tr>\n"); Map<String, String[]> paramMap = request.getParameterMap(); Set<String> paramNameSet = paramMap.keySet(); for (String paramName : paramNameSet) { out.print("<tr><td>" + paramName + "</td>\n<td>"); String[] paramValues = request.getParameterValues(paramName); // Read single valued data if (paramValues.length == 1) { String paramValue = paramValues[0]; if (paramValue.length() == 0) { out.println("<i>No Value</i>"); } else { out.println(paramValue); } } else { // Read multiple valued data out.println("<ul>"); for (int i = 0; i < paramValues.length; i++) { out.println("<li>" + paramValues[i]); } out.println("</ul>"); } } out.println("</tr>\n</table>\n</body></html>"); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } public void destroy() { System.out .println("-----------------------------------------------------"); System.out .println("destroy method has been called and servlet is destroyed"); System.out .println("-----------------------------------------------------"); } }
web.xml
<?xml version="1.0" encoding="ISO-8859-1"?> <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" metadata-complete="true" version="3.0"> <display-name>ServletForm GET</display-name> <description> This is a simple web application with a source code organization based on the recommendations of the Application Developer's Guide. </description> <servlet> <servlet-name>readAllParams</servlet-name> <servlet-class>ReadAllParamsServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>readAllParams</servlet-name> <url-pattern>/readAllParams</url-pattern> </servlet-mapping> </web-app>
index.html
<!DOCTYPE HTML> <html lang="en"> <head> <meta charset="UTF-8"> <title>Order Pizza</title> </head> <body> <p> <h3>Order Pizza</H3> <p></p> <ul> <li><a href="pizza.html">Order Pizza</a></li> </ul> </body> </html>
pizza.html
<html> <head> <title>Retrieving All Parameters</title> </head> <body> <h4>Order your Pizza Here</h4> <form action="readAllParams" method="GET"> <b>Name</b> <input type="text" name="name"><br><br> <b>Select the Crust:</b> <select name = "crust"> <option value="pan">Pan</option> <option value="thin">Thin Crust</option> <option value="deep">Deep Crust</option> <option value="cheese">Cheese Burst</option> </select> <br><br> <b>Toppings: </b><br> <input type="checkbox" name="toppings" value="peas">Peas<br> <input type="checkbox" name="toppings" value="paneer">Paneer<br> <input type="checkbox" name="toppings" value="redpeppers">Red Peppers<br> <input type="checkbox" name="toppings" value="pineapple">Pineapple<br> <input type="checkbox" name="toppings" value="onion">Onion<br> <input type="checkbox" name="toppings" value="tomato">Tomato<br><br> <b>Select 1 FREE Appetizer</b> <input type="radio" name="appetizer" value="Garlic Bread">Garlic Bread <input type="radio" name="appetizer" value="Cheese Garlic Bread">Cheese Garlic Bread <input type="radio" name="appetizer" value="Veg Soup">Veg Soup <input type="radio" name="appetizer" value="Veg Sandwich">Veg Sandwich<br><br> <b>Address</b><br> <textarea name="address" rows=3 cols=40></textarea><br><br> <b>Credit Card:</b><br> <input type="radio" name="cardType" value="Visa">Visa <input type="radio" name="cardType" value="MasterCard">MasterCard <input type="radio" name="cardType" value="Amex">American Express <br><br> <b>Credit Card Number:</b> <input type="password" name="cardNum"> <b>Repeat Credit Card Number: </b><input type="password" name="cardNum"><br><br> <input type="submit" name="submit" value="Order Pizza"> </form> </body> </html>
Environment Used
JDK version :1.6.0_30
Tomcat version : 7.0.50
To Download ServletFormReadAllParam_Map_App Project Click the below link
https://sites.google.com/site/javaee4321/servlets/ServletFormReadAllParam_Map_App.zip?attredirects=0&d=1
See also:
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