顺便演示了MVC的作法，以后hello.view可以移交到jsp中处理。
而MODEL和CONTROL,VIEW就实现了分享。
HelloModel.java:
package cc.openhome;
import java.util.*;
public class HelloModel {
private Map<String, String> messages =
new HashMap<String, String>();
public HelloModel() {
messages.put("caterpillar", "Hello");
messages.put("Justin", "Welcome");
messages.put("momor", "Hi");
}
public String doHello(String user) {
String message = messages.get(user);
System.out.println(message + "@@@@@@@@@@@@@@@@@");
return message + ", " + user + "!";
}
}
HelloController.java:
package cc.openhome;
import java.io.IOException;
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 HelloController
*/
@WebServlet("/hello.do")
public class HelloController extends HttpServlet {
private static final long serialVersionUID = 1L;
private HelloModel model = new HelloModel();
/**
* @see HttpServlet#HttpServlet()
*/
public HelloController() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String name = request.getParameter("user");
String message = model.doHello(name);
System.out.println(message + "$$$$$$$$$$");
request.setAttribute("message", message);
request.getRequestDispatcher("hello.view").forward(request, response);
}
}
HelloView.java:
package cc.openhome;
import java.io.IOException;
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 HelloView
*/
@WebServlet("/hello.view")
public class HelloView extends HttpServlet {
private static final long serialVersionUID = 1L;
private String htmlTemplate =
"<html>"
+ " <head>"
+ " <meta http-equiv=‘Content-Type‘"
+ " content=‘text/html; charset=UTF-8‘>"
+ " <title>%s</title>"
+ " </head>"
+ " <body>"
+ " <h1>%s</h1>"
+ " </body>"
+ "</html>";
/**
* @see HttpServlet#HttpServlet()
*/
public HelloView() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String user = request.getParameter("user");
String message = (String) request.getAttribute("message");
System.out.println(user + message + "##################");
String html = String.format(htmlTemplate, user, message);
response.getWriter().print(html);
}
}
时间： 2024-08-08 05:37:00