Test3/src/TestServlet.java



import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


 public class TestServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
         
        static final long serialVersionUID = 1;
        
        public TestServlet() {
                super();
        }       
        
        
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
                
                int count = parseArguments(request);
                String resp = buildResponse(count);
                
                response.setContentType("text/html");
                response.getWriter().print( resp );
        }


        protected int parseArguments(HttpServletRequest request) {
                int count = 10; 
                String countStr = request.getParameter("count");
                if (countStr != null) 
                {
                        try
                        {
                                int radix = 10;
                                if (countStr.length() >2 && countStr.substring(0, 2).equalsIgnoreCase("0x") )
                                {
                                        radix = 16;
                                        countStr = countStr.substring(2);
                                }
                                
                                count = Integer.parseInt(countStr,radix);
                                count = Math.min(count, 1000); //overflow protection
                                count = Math.max(count, 5); //min 5 rows
                        } catch (NumberFormatException e)
                        {
                                //System.out.println(e);
                        }
                }
                return count;
        }                           

        protected String buildResponse(int count)
        {
                StringBuilder sb = new StringBuilder();
                sb.append("<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">");
                sb.append("<html><head><title>Servlet hello world</title></head><body>\n");
                //sb.append("<form action='' method='get'><input type='text' name='count'value='").append(count).append("'></form><br>");
                for (int i=1; i<=count; i++) {
                        sb.append("Hello World! #").append( i ).append(" <br>\n");
                }
                sb.append("</body></html>");

                return sb.toString();
        }
 }
1
2
3	import java.io.IOException;
4	import javax.servlet.ServletException;
5	import javax.servlet.http.HttpServletRequest;
6	import javax.servlet.http.HttpServletResponse;
7
8
9
10	public class TestServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
11
12	static final long serialVersionUID = 1;
13
14	public TestServlet() {
15	super();
16	}
17
18
19
20
21	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
22
23	int count = parseArguments(request);
24	String resp = buildResponse(count);
25
26	response.setContentType("text/html");
27	response.getWriter().print( resp );
28	}
29
30
31
32	protected int parseArguments(HttpServletRequest request) {
33	int count = 10;
34	String countStr = request.getParameter("count");
35	if (countStr != null)
36	{
37	try
38	{
39	int radix = 10;
40	if (countStr.length() >2 && countStr.substring(0, 2).equalsIgnoreCase("0x") )
41	{
42	radix = 16;
43	countStr = countStr.substring(2);
44	}
45
46	count = Integer.parseInt(countStr,radix);
47	count = Math.min(count, 1000); //overflow protection
48	count = Math.max(count, 5); //min 5 rows
49	} catch (NumberFormatException e)
50	{
51	//System.out.println(e);
52	}
53	}
54	return count;
55	}
56
57	protected String buildResponse(int count)
58	{
59	StringBuilder sb = new StringBuilder();
60	sb.append("<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">");
61	sb.append("<html><head><title>Servlet hello world</title></head><body>\n");
62	//sb.append("<form action='' method='get'><input type='text' name='count'value='").append(count).append("'></form><br>");
63	for (int i=1; i<=count; i++) {
64	sb.append("Hello World! #").append( i ).append(" <br>\n");
65	}
66	sb.append("</body></html>");
67
68	return sb.toString();
69	}
70	}