📄 badcodeservlet.java

📁 servlet与jsp核心编程书籍源码部分

💻 JAVA

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package coreservlets;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

/** Servlet that displays a fragment of some Java code,
 *  but forgets to filter out the HTML-specific characters
 *  (the less-than sign in this case). 
 *  <P>
 *  Taken from Core Servlets and JavaServer Pages
 *  from Prentice Hall and Sun Microsystems Press,
 *  http://www.coreservlets.com/.
 *  &copy; 2000 Marty Hall; may be freely used or adapted.
 */

public class BadCodeServlet extends HttpServlet {
  private String codeFragment =
    "if (a<b) {\n" +
    "  doThis();\n" +
    "} else {\n" +
    "  doThat();\n" +
    "}\n";

  public String getCodeFragment() {
    return(codeFragment);
  }
  
  public void doGet(HttpServletRequest request,
                    HttpServletResponse response)
      throws ServletException, IOException {
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();
    String title = "The Java 'if' Statement";
    
    out.println(ServletUtilities.headWithTitle(title) +
                "<BODY>\n" +
                "<H1>" + title + "</H1>\n" +
                "<PRE>\n" +
                getCodeFragment() +
                "</PRE>\n" +
                "Note that you <I>must</I> use curly braces\n" +
                "when the 'if' or 'else' clauses contain\n" +
                "more than one expression.\n" +
                "</BODY></HTML>");
  }
}

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