HelloYoupublic class HelloYou extends HttpServlet | This is a simple servlet example that shows the main request methods. |
| Methods Summary |
|---|
| public void | doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)This method writes the most commonly used request information
to the response body, such as the User-Agent header, the
various paths associated with the request, and the request
parameters.
String name = request.getParameter("name");
if (name == null) {
name = "you";
}
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html><body>");
out.println("<h1>Hello " + name + "</h1>");
out.println("I see that:<ul>");
String userAgent = request.getHeader("User-Agent");
out.println("<li>your browser is: " + userAgent);
String requestURI = request.getRequestURI();
out.println("<li>the URI for this page is: " +
requestURI);
String contextPath = request.getContextPath();
out.println("<li>the context path for this app is" +
contextPath);
String servletPath = request.getServletPath();
out.println("<li>this servlet is mapped to: " +
servletPath);
String pathInfo = request.getPathInfo();
out.println("<li>the remaining path is: " + pathInfo);
Map parameters = request.getParameterMap();
out.println("<li>you sent the following params:<ul>");
Iterator i = parameters.keySet().iterator();
while (i.hasNext()) {
String paramName = (String) i.next();
out.println("<li><b>" + paramName + "</b>:");
String[] paramValues =
(String[]) parameters.get(paramName);
for (int j = 0; j < paramValues.length; j++) {
if (j != 0) {
out.print(", ");
}
out.print(paramValues[j]);
}
}
out.println("</ul></ul></body></html>");
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