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2.4 Packaging Servlets

27

Core Approach

Always set the content type 

before

 transmitting the actual document.

The second step in writing a servlet that builds an HTML document is to

have your 

println

 statements output HTML, not plain text. The structure of

an HTML document is discussed more in Section 2.5 (Simple HTML Build 

ing Utilities), but it should be familiar to most readers. Listing 2.3 gives an

example servlet, with the result shown in Figure 2 2. 

Listing 2.3 HelloWWW.java 

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class HelloWWW extends HttpServlet {

  public void doGet(HttpServletRequest request,

                    HttpServletResponse response)

      throws ServletException, IOException {

    response.setContentType("text/html");

    PrintWriter out = response.getWriter();

    String docType =

      "