package com.ideas.servlet;import javax.servlet.*;import javax.servlet.http.*;import Acme.JPM.Encoders.GifEncoder;// standard importsimport java.awt.image.BufferedImage;import java.awt.image.ImageObserver;import java.awt.*;import java.net.URL;import java.io.IOException;import java.io.OutputStream;import java.io.*;import javax.imageio.*;import com.sun.media.imageio.stream.*;import com.ideas.data.DBAccess;import com.ideas.util.Configuration;public class SnalsGraphServlet extends HttpServlet{    private static final int RADIUS = 200;    private static final int WIDTH = 110;    private static final int HEIGHT = 120;    private static final int X_RADIUS = 200;    private static final int Y_RADIUS = 150;    private static final Color BG_COLOR = new Color(0xffffff);    private static final Color TEXT_COLOR = new Color(0x000000);    private static final Color FG_COLOR = new Color(0x6699FF);    private static final Color BODY_COLOR = new Color(0x6666FF);    private static final Color GRAPHICS_BG_COLOR = Color.yellow;    public void service(HttpServletRequest req, HttpServletResponse res) throws        IOException, ServletException    {        res.setContentType("image/gif;charset=gb2312");        OutputStream out = res.getOutputStream();        BufferedImage img =            new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_ARGB);        Graphics2D g = (Graphics2D)img.getGraphics();        double total = 100.0;        String ipaddress = req.getParameter("ipaddress");        String[] data = DBAccess.getLatestData(            "select state from snals where ipaddress='" + ipaddress +            "' order by timestamp desc");        if(data[0].equals("ACTIVE"))       {           g.setColor(Color.GREEN);           g.drawString("active",0,38);           int h = 0;           Polygon ply = new Polygon();           ply.addPoint(0, 40 + h);           ply.addPoint(90, 40 + h);           ply.addPoint(85, 35 + h);           ply.addPoint(100, 42 + h);           ply.addPoint(85, 49 + h);           ply.addPoint(90, 44 + h);           ply.addPoint(0, 44 + h);           g.fillPolygon(ply);       }       else       {           g.setColor(Color.RED);           int h = 52;           g.drawString("unactive",0,38 + h);           Polygon ply = new Polygon();           ply.addPoint(0, 40 + h);           ply.addPoint(90, 40 + h);           ply.addPoint(85, 35 + h);           ply.addPoint(100, 42 + h);           ply.addPoint(85, 49 + h);           ply.addPoint(90, 44 + h);           ply.addPoint(0, 44 + h);           g.fillPolygon(ply);       }        g.setColor(Color.BLACK);        g.drawString("當前狀態為：", 0, 10);        g.setComposite(AlphaComposite.getInstance(AlphaComposite.CLEAR, 0.0f));        GifEncoder ge = new GifEncoder(img, out);        ge.encode();        out.close();    }    public void init() throws ServletException    {    }}