复合模式-webMVC

绝地灬酷狼 2022-07-16 16:17 146阅读 0赞

package N\_Composite.web\_mvc;

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

public class DJViewServlet extends HttpServlet \{

private static final long serialVersionUID = 2L;
    
    public void init() throws ServletException {
        BeatModel beatModel = new BeatModel();
        beatModel.initialize();
        getServletContext().setAttribute("beatModel", beatModel);
    }
    
    public void doGet(HttpServletRequest request,
            HttpServletResponse response)
                    throws IOException, ServletException
    {
        doPost(request, response);
    }
    
    public void doPost(HttpServletRequest request,
            HttpServletResponse response)
                    throws IOException, ServletException
    {
        BeatModel beatModel = 
                (BeatModel)getServletContext().getAttribute("beatModel");
    
        String bpm = request.getParameter("bpm");
        if (bpm == null) {
            bpm = beatModel.getBPM() + "";
        }
    
        String set = request.getParameter("set");
        if (set != null) {
            int bpmNumber = 90;
            bpmNumber = Integer.parseInt(bpm);
            beatModel.setBPM(bpmNumber);
        }
    
        String decrease = request.getParameter("decrease");
        if (decrease != null) {
            beatModel.setBPM(beatModel.getBPM() - 1);
        }
        String increase = request.getParameter("increase");
        if (increase != null) {
            beatModel.setBPM(beatModel.getBPM() + 1);
        }
        String on = request.getParameter("on");
        if (on != null) {
            beatModel.on();
        }
        String off = request.getParameter("off");
        if (off != null) {
            beatModel.off();
        }
    
        request.setAttribute("beatModel", beatModel);
    
        RequestDispatcher dispatcher = 
                request.getRequestDispatcher("/djview.jsp");
        dispatcher.forward(request, response);
    
    }

\}  
  
  
  
  
DJView Web Application  
  
  
DJView

DJ View

# DJ View #

Beats per minutes =

--------------------

BPM: ”>  
>”>