<span style="font-size:18px;">/**
* Top10
* author:杨鑫
*/
package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class Top10Servlet
*/
@WebServlet("/top10")
public class Top10Servlet extends HttpServlet {
private List<String> londonAttractions;
private List<String> parisAttractions;
/**
* 默认的无參数构造方法
*/
public Top10Servlet() {
super();
// TODO Auto-generated constructor stub
}
public void init() throws ServletException {
// TODO Auto-generated method stub
londonAttractions = new ArrayList<String>(10);
londonAttractions.add("Buckingham Palace");
londonAttractions.add("London Eye");
londonAttractions.add("British Museum");
londonAttractions.add("National Gallery");
londonAttractions.add("BigBen");
londonAttractions.add("Tower of London");
londonAttractions.add("Natural History Museum");
londonAttractions.add("Canary Wharf");
londonAttractions.add("2012 Olympic Park");
londonAttractions.add("St Paul's Cathedral");
parisAttractions = new ArrayList<String>(10);
parisAttractions.add("Eiffel Tower");
parisAttractions.add("Notre Dame");
parisAttractions.add("The Louvre");
parisAttractions.add("Champs Elysees");
parisAttractions.add("Arc de Triomphe");
parisAttractions.add("Sainte Chapelle Church");
parisAttractions.add("Les Invalides");
parisAttractions.add("Musee d'Orsay");
parisAttractions.add("Montmarte");
parisAttractions.add("Sacre Couer Basilica");
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String city = request.getParameter("city");
if(city != null && (city.equals("london") || city.equals("paris"))){
showAttractions(request, response, city);
}else{
showMainPage(request, response);
}
}
private void showMainPage(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
out.print("<html><head>" + "<title>Top 10 Tourist Attractions</title>" + "</head><body>" + "please select a city:" + "<br/><a href='?city=london'>London</a>" + "<br/><a href='?
city=paris'>Paris</a>" + "</body></html>");
}
private void showAttractions(HttpServletRequest request, HttpServletResponse response, String city) throws ServletException, IOException{
int page = 1;
String pageParameter = request.getParameter("page");
if(pageParameter != null){
try{
page = Integer.parseInt(pageParameter);
}catch(NumberFormatException e){
e.printStackTrace();
}
if(page > 2){
page = 1;
}
}
List<String> attractions = null;
if(city.equals("london")){
attractions = londonAttractions;
}else if(city.equals("paris")){
attractions = parisAttractions;
}
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html><head>" + "<title>Top 10 Tourist Attraction</title>" + "</head><body>");
out.println("<a href ='top10'>Select City</a>");
out.println("<hr/>Page " + page + "<hr/>");
int start = page * 5 - 5;
for(int i = start; i < start + 5; i++)
{
out.println(attractions.get(i) + "<br/>");
out.print("<hr style ='color:blue'/>" + "<a href='?
city=" + city + "&page=1'>Page 1</a>");
out.println(" <a href='?city=" + city + "&page=2'>Page 2</a>");
out.println("</body></html>");
}
}
}
</span>
这里的配置文件我就不贴出来了。
请自行配置：
如图效果
细节：
