学步园

LineChart.java(applet)

public class LineChart extends JApplet implements Runnable {</p> <p> int width = 500, height = 400;<br /> int plotWidth = 400, plotHeight = 300;<br /> ChartData indt = new ChartData("纵坐标:流量 单位:M", "横坐标:时间 单位:s", "网络流量图", 12);<br /> ChartData outdt = new ChartData("流量|单位:M", "时间单位:s", "网络流量图", 12);<br /> Image offImage;<br /> Graphics2D offGraphics;<br /> int dataLength = 0;<br /> Thread timer;<br /> String data="null";<br /> String serverUrl="null";<br /> String[] indata;<br /> String[] outdata;<br /> String[] temp;<br /> int index=0;<br /> byte tom[]=new byte[100000];<br /> public void init() {<br /> offImage = createImage(width, height);<br /> offGraphics = (Graphics2D) offImage.getGraphics();<br /> offGraphics.setColor(Color.white);<br /> offGraphics.fillRect(0, 0, width, height);</p> <p> //for test aim<br /> //ChartData cd = new ChartData("flow", "time", "network flow statistic chart", 12);<br /> //ChartData("flow","time","network flow statistic chart", 12);<br /> for (int i = 0; i < 12; i++) {<br /> //cd.addvalue(plotHeight - (65 + (Math.random() * 220)), i);<br /> indt.addvalue(plotHeight - (65 + (int) (Math.random() * 220)), i);<br /> }<br /> // this.indt = cd;</p> <p> for (int i = 0; i < 12; i++) {<br /> //cd.addvalue(plotHeight - (32 + (Math.random() * 210)), i);<br /> outdt.addvalue(plotHeight - (32 + (int) (Math.random() * 210)), i);<br /> }<br /> // this.outdt = cd;<br /> serverUrl = getParameter("serverUrl");<br /> //serverUrl = "http://192.168.1.103:8080/MeishanMobile";<br /> System.out.println("serverUrl:"+serverUrl);<br /> setLayout(new BorderLayout());<br /> JButton saveButton = new JButton("保存流量图");<br /> saveButton.addActionListener(new ActionListener() {<br /> public void actionPerformed(ActionEvent e) {<br /> try {<br /> // Overrides the exit method to not<br /> // call System.exit, but stop the<br /> // applet instead.<br /> Frame f=new fileDialog("File Dialog");<br /> f.setVisible(false);<br /> f.setSize(100,100);<br /> FileDialog fd=new FileDialog(f,"File Dialog",FileDialog.SAVE);<br /> fd.setVisible(true);<br /> File f1 = new File(fd.getDirectory(),fd.getFile());<br /> FileOutputStream writefile = new FileOutputStream(f1);<br /> ByteArrayOutputStream bos = new ByteArrayOutputStream();<br /> ImageIO.write((RenderedImage)offImage, "jpg", bos);<br /> writefile.write(bos.toByteArray(),0,bos.toByteArray().length);<br /> writefile.close();</p> <p> } catch (Exception e1) {</p> <p> e1.printStackTrace();<br /> }<br /> }<br /> });<br /> add(saveButton, BorderLayout.SOUTH);<br /> }</p> <p> public void start() {<br /> timer = new Thread(this);<br /> timer.start();<br /> }</p> <p> public void stop() {<br /> timer = null;<br /> }</p> <p> public void run() {<br /> Thread me = Thread.currentThread();<br /> while (timer == me) {<br /> try {<br /> Thread.currentThread().sleep(5000);</p> <p> } catch (InterruptedException e) {<br /> }<br /> try{<br /> if(index%11==0)<br /> {<br /> URL url = new URL(getCodeBase(), serverUrl+"/servlet/GetChartDataServerlet");<br /> URLConnection con = url.openConnection();<br /> con.setUseCaches(false);<br /> InputStream in = con.getInputStream();<br /> DataInputStream textStream;<br /> textStream = new DataInputStream(in);<br /> data = textStream.readLine();<br /> temp=data.split("&");<br /> indata=temp[0].split(",");<br /> outdata=temp[1].split(",");<br /> index=0;<br /> }<br /> indt.addIndata(Integer.parseInt(indata[index]));<br /> outdt.addIndata(Integer.parseInt(outdata[index]));<br /> index++;<br /> }catch(Exception e){data=e.getMessage();<br /> }<br /> repaint();<br /> }<br /> }</p> <p> public void drawBackground() {</p> <p> int shadowOffset = 5;</p> <p> offGraphics.setColor(Color.BLACK);<br /> offGraphics.setFont(new Font("汉真广标", Font.PLAIN, 35));<br /> offGraphics.drawString("演示流量图", 10, 40);</p> <p> offGraphics.setColor(Color.white);<br /> offGraphics.fillRect(0, 0, width, height);</p> <p> offGraphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING,<br /> RenderingHints.VALUE_ANTIALIAS_ON);</p> <p> GradientPaint grayGP = new GradientPaint(0, 0, Color.GRAY, width, height,<br /> new Color(218, 214, 212), false);<br /> offGraphics.setPaint(grayGP);<br /> RoundRectangle2D.Float bgRR = new RoundRectangle2D.Float(shadowOffset,<br /> shadowOffset, width - shadowOffset, height - shadowOffset, 50, 50);<br /> offGraphics.fill(bgRR);</p> <p> GradientPaint blueGP = new GradientPaint(0, 0, new Color(93, 117, 151), 0,<br /> height, new Color(90, 114, 150), false);</p> <p> offGraphics.setPaint(blueGP);<br /> offGraphics.fillRoundRect(0, 0, width - shadowOffset, height - shadowOffset, 50, 50);</p> <p> BasicStroke bs = new BasicStroke(2.0f);<br /> offGraphics.setStroke(bs);<br /> offGraphics.setPaint(new Color(55, 71, 105));<br /> offGraphics.drawRoundRect(0, 0, width - shadowOffset, height - shadowOffset, 50, 50);</p> <p> Rectangle2D.Float drawArea = new Rectangle2D.Float(83, 33, plotWidth, plotHeight);<br /> offGraphics.setPaint(new Color(27, 60, 105));<br /> offGraphics.fill(drawArea);</p> <p> GradientPaint plotGP = new GradientPaint(120, 60, new Color(215, 230, 252),<br /> 120, 300, Color.WHITE, false);<br /> offGraphics.setPaint(plotGP);</p> <p> drawArea = new Rectangle2D.Float(80, 30, plotWidth, plotHeight);<br /> offGraphics.fill(drawArea);</p> <p> bs = new BasicStroke(1.2f);<br /> offGraphics.setStroke(bs);<br /> offGraphics.setPaint(Color.BLACK);<br /> offGraphics.draw(drawArea);</p> <p> offGraphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING,<br /> RenderingHints.VALUE_ANTIALIAS_OFF);<br /> }</p> <p> public void drawTitle() {<br /> offGraphics.setFont(new Font("宋体", Font.PLAIN, 18));<br /> int titleLength = offGraphics.getFontMetrics().stringWidth(indt.gettitle());</p> <p> offGraphics.setColor(Color.WHITE);<br /> offGraphics.drawString(indt.gettitle(), (width - titleLength) / 2, 22);<br /> }</p> <p> public void drawChart() {</p> <p> AffineTransform old = offGraphics.getTransform();<br /> offGraphics.translate(80, 30);</p> <p> float[] dashes = {3.f};<br /> BasicStroke bs = new BasicStroke(1.0f, BasicStroke.CAP_ROUND,<br /> BasicStroke.JOIN_ROUND, 10, dashes, 0);<br /> offGraphics.setStroke(bs);<br /> offGraphics.setFont(new Font("Courier New", Font.PLAIN, 12));</p> <p> String str = "";<br /> int stringLength = 0, stringHeight = 0;</p> <p> int xTickCounter = 12;</p> <p> int plotMargin = 10;</p> <p> int hSpace = (plotWidth - 2 * plotMargin) / (xTickCounter - 1);</p> <p> stringHeight = offGraphics.getFontMetrics().getAscent();<br /> for (int i = 0; i < xTickCounter; i++) {</p> <p> offGraphics.setColor(new Color(103, 115, 133));<br /> offGraphics.drawLine(plotMargin + i * hSpace, 0, plotMargin + i * hSpace,<br /> plotHeight);</p> <p> str += i + 1;<br /> stringLength = offGraphics.getFontMetrics().stringWidth(str);<br /> offGraphics.setColor(Color.YELLOW);<br /> if (i % 2 == 0) {<br /> offGraphics.drawString(str, plotMargin + i * hSpace - stringLength / 2,<br /> plotHeight + stringHeight + 5);<br /> }<br /> str = "";<br /> }</p> <p> str = "";</p> <p> int vTickCounter = 10;</p> <p> int vSpace = plotHeight / vTickCounter;</p> <p> for (int i = 0; i < vTickCounter; i++) {</p> <p> offGraphics.setColor(new Color(103, 115, 133));<br /> offGraphics.drawLine(0, i * vSpace, plotWidth, i * vSpace);</p> <p> str += (plotHeight - i * vSpace) / 10;<br /> stringLength = offGraphics.getFontMetrics().stringWidth(str);<br /> offGraphics.setColor(Color.YELLOW);<br /> offGraphics.drawString(str, - 5 - stringLength, i * vSpace + stringHeight / 2);<br /> str = "";<br /> }</p> <p> String[] flowTitle = {"输入流量", "输出流量"};<br /> Color[] flowColor = {Color.RED, Color.ORANGE};<br /> int[] flows = new int[xTickCounter];<br /> int[] time = new int[xTickCounter];</p> <p> offGraphics.setFont(new Font("Courier New", Font.PLAIN, 12));</p> <p> int i = 0;<br /> while (i < 2) {<br /> int j = 0;<br /> if (i == 0) {</p> <p> for (j = 0; j < flows.length; j++) {<br /> flows[j] = indt.getvalue(j);</p> <p> time[j] = plotMargin + j * hSpace;<br /> }<br /> } else {<br /> for (j = 0; j < flows.length; j++) {<br /> flows[j] = outdt.getvalue(j);<br /> time[j] = plotMargin + j * hSpace;<br /> }</p> <p> }</p> <p> offGraphics.setStroke(new BasicStroke(5.0f));<br /> offGraphics.setColor(flowColor[i]);<br /> offGraphics.drawPolyline(time, flows, flows.length);<br /> i++;</p> <p> }<br /> offGraphics.setTransform(old);<br /> drawLegend(flowTitle, flowColor);</p> <p> }</p> <p> public void drawLegend(String[] legendItems, Color[] color) {<br /> offGraphics.setStroke(new BasicStroke());<br /> offGraphics.setFont(new Font("宋体", Font.PLAIN, 12));<br /> offGraphics.setPaint(Color.WHITE);</p> <p> int itemHeight = offGraphics.getFontMetrics().getAscent();<br /> int itemWidth[] = new int[legendItems.length];</p> <p> int legendWidth = 20;</p> <p> for (int i = 0; i < legendItems.length; i++) {<br /> itemWidth[i] = offGraphics.getFontMetrics().stringWidth(legendItems[i]);</p> <p> if (i != legendItems.length - 1) {<br /> legendWidth += itemWidth[i] + 20;<br /> } else {<br /> legendWidth += itemWidth[i] + 15;<br /> }<br /> }</p> <p> offGraphics.fillRect((width - legendWidth) / 2, height - 25, legendWidth, itemHeight + 5);<br /> offGraphics.setColor(Color.BLACK);<br /> offGraphics.drawRect((width - legendWidth) / 2, height - 25, legendWidth, itemHeight + 5);</p> <p> int itemAnchor = (width - legendWidth) / 2 + 10;<br /> offGraphics.setColor(Color.BLACK);<br /> for (int i = 0; i < legendItems.length; i++) {<br /> offGraphics.setColor(color[i]);<br /> offGraphics.fillRect(itemAnchor, height - 20, 10, 10);<br /> offGraphics.setColor(Color.BLACK);<br /> offGraphics.drawString(legendItems[i], itemAnchor + 15, height - 12);<br /> itemAnchor += itemWidth[i] + 20;<br /> }<br /> }</p> <p> public void drawAxisLabel() {<br /> offGraphics.setFont(new Font("楷体_GB2312", Font.BOLD, 18));<br /> offGraphics.setPaint(new Color(255, 224, 193));</p> <p> int labelHeight = offGraphics.getFontMetrics().getAscent();<br /> int labelLength = offGraphics.getFontMetrics().stringWidth(indt.getytitle());</p> <p> AffineTransform old = offGraphics.getTransform();</p> <p> offGraphics.translate(40, (height + labelLength) / 2);<br /> offGraphics.rotate(-Math.PI / 2);<br /> offGraphics.drawString(indt.getytitle(), 0, 0);</p> <p> offGraphics.setTransform(old);</p> <p> labelLength = offGraphics.getFontMetrics().stringWidth(indt.getxtitle());<br /> offGraphics.drawString(indt.getxtitle(), (width - labelLength) / 2, 365);<br /> }</p> <p> public void paint(Graphics g) {<br /> int i = 0;/*<br /> boolean flag = true;<br /> while (flag) {<br /> try {<br /> java.lang.Thread.sleep(1000);<br /> } catch (Exception e) {<br /> }<br /> i++;<br /> update(g);<br /> indt.changevalue();<br /> outdt.changevalue2();<br /> }*/<br /> this.drawBackground();<br /> this.drawTitle();<br /> this.drawChart();<br /> this.drawAxisLabel();</p> <p> g.drawImage(offImage, 0, 0, null);</p> <p> }</p> <p> public void update(Graphics g) {</p> <p> paint(g);</p> <p> }<br /> } //LineChart end<br /> class fileDialog extends Frame<br /> {<br /> fileDialog(String title)<br /> {<br /> super(title);<br /> MyWindowAdapter adapter = new MyWindowAdapter(this);<br /> addWindowListener(adapter);<br /> }<br /> }<br /> class MyWindowAdapter extends WindowAdapter<br /> {<br /> fileDialog sf;<br /> public MyWindowAdapter(fileDialog sfr)<br /> {<br /> this.sf=sfr;<br /> }<br /> public void windowClosing(WindowEvent we)<br /> {<br /> sf.setVisible(false);<br /> }<br /> }

 ChartData.java(流量数据存储类)

public class ChartData {<br /> String title;<br /> String xtitle;<br /> String ytitle;</p> <p> int value[];<br /> public ChartData()<br /> {}<br /> public ChartData(String title, String xtitle, String ytitle, int n)<br /> {<br /> this.title = title;<br /> this.xtitle = xtitle;<br /> this.ytitle = ytitle;<br /> this.value = new int[n];<br /> }</p> <p> public void addvalue(int data, int index)<br /> {<br /> value[index] = data;<br /> }</p> <p> public String gettitle()<br /> {<br /> return this.title;<br /> }</p> <p> public String getxtitle()<br /> {<br /> return this.xtitle;<br /> }</p> <p> public String getytitle()<br /> {<br /> return this.ytitle;<br /> }</p> <p> public int getvalue(int index)<br /> {<br /> return value[index];<br /> }<br /> public void changevalue()<br /> {<br /> if(value.length>0)<br /> {<br /> for(int i=0;i<value.length-1;i++)<br /> {<br /> value[i]=value[i+1];<br /> }<br /> value[value.length-1]=300-(32 + (int)(Math.random() * 220));<br /> }<br /> }<br /> public void changevalue2()<br /> {<br /> if(value.length>0)<br /> {<br /> for(int i=0;i<value.length-1;i++)<br /> {<br /> value[i]=value[i+1];<br /> }<br /> value[value.length-1]=300-(32 + (int)(Math.random() * 210));<br /> }<br /> }<br /> public void addIndata(int point)<br /> {<br /> if(value.length>0)<br /> {<br /> for(int i=0;i<value.length-1;i++)<br /> {<br /> value[i]=value[i+1];<br /> }<br /> value[value.length-1]=point;<br /> }<br /> }<br /> }<br />

GetChartDataServerlet.java(serverlet)

public class GetChartDataServerlet extends HttpServlet {</p> <p> /**<br /> * Constructor of the object.<br /> */<br /> public GetChartDataServerlet() {<br /> super();<br /> }</p> <p> /**<br /> * Destruction of the servlet. <br><br /> */<br /> public void destroy() {<br /> super.destroy(); // Just puts "destroy" string in log<br /> // Put your code here<br /> }</p> <p> /**<br /> * The doGet method of the servlet. <br><br /> *<br /> * This method is called when a form has its tag value method equals to get.<br /> *<br /> * @param request the request send by the client to the server<br /> * @param response the response send by the server to the client<br /> * @throws ServletException if an error occurred<br /> * @throws IOException if an error occurred<br /> */<br /> public void doGet(HttpServletRequest request, HttpServletResponse response)<br /> throws ServletException, IOException {</p> <p> response.setContentType("text/html");<br /> PrintWriter out = response.getWriter();</p> <p> String data="&";int inpoint,outpoint;<br /> for(int i=0;i<12;i++)<br /> {<br /> inpoint=65 + (int) (Math.random() * 220);<br /> outpoint=32 + (int) (Math.random() * 210);<br /> if(i==0)<br /> {<br /> data+=outpoint;<br /> data=inpoint+data;<br /> }<br /> else{<br /> data+=","+outpoint;<br /> data=inpoint+","+data;<br /> }<br /> }<br /> out.println(data);<br /> }</p> <p> /**<br /> * The doPost method of the servlet. <br><br /> *<br /> * This method is called when a form has its tag value method equals to post.<br /> *<br /> * @param request the request send by the client to the server<br /> * @param response the response send by the server to the client<br /> * @throws ServletException if an error occurred<br /> * @throws IOException if an error occurred<br /> */<br /> public void doPost(HttpServletRequest request, HttpServletResponse response)<br /> throws ServletException, IOException {</p> <p> response.setContentType("text/html");<br /> PrintWriter out = response.getWriter();<br /> out<br /> .println("<!DOCTYPE HTML PUBLIC /"-//W3C//DTD HTML 4.01 Transitional//EN/">");<br /> out.println("<HTML>");<br /> out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");<br /> out.println(" <BODY>");<br /> out.print(" This is ");<br /> out.print(this.getClass());<br /> out.println(", using the POST method");<br /> out.println(" </BODY>");<br /> out.println("</HTML>");<br /> out.flush();<br /> out.close();<br /> }</p> <p> /**<br /> * Initialization of the servlet. <br><br /> *<br /> * @throws ServletException if an error occurs<br /> */<br /> public void init() throws ServletException {<br /> // Put your code here<br /> }</p> <p>}<br />

页面：

<%<br /> String serverPath = request.getContextPath();<br /> String serverletPath = request.getScheme() + "://"<br /> + request.getServerName() + ":" + request.getServerPort()<br /> + serverPath;<br /> %></p> <p> <APPLET CODE="com.mobile.service.LineChart.class" name="chart"<br /> WIDTH="500" HEIGHT="450" ARCHIVE ="chart.jar"><br /> <param name="serverUrl" value="<%=serverletPath%>"><br /> </APPLET>  

 注意：流量图保存功能需要applet访问本地文件，这里要用到java的数字签名。具体操作见http://blog.csdn.net/hanzengyi/archive/2009/08/31/4505031.aspx