| ＜%@ page contentType="text/html;charSet=gb2312"%＞ ＜% response.setHeader("Cache-Control","no-store"); response.setDateHeader("Expires",0); %＞ ＜%! //getQuestion(String)函数用来获得文本文件中的问题 public String[] getQuestion(String s) { String[] strQ = new String[4]; String strTemp = null; int i; Java.io.RandomAccessFile rf = null; try { rf = new Java.io.RandomAccessFile(s,"r"); } catch(Exception e) { System.out.println(e); System.exit(0); } for(i=0;i＜4;i++) { try { strTemp = rf.readLine(); } catch(Exception e) { strTemp = "None Question"; } if(strTemp==null)strTemp = "None Question"; strQ = strTemp; } return strQ; } %＞ ＜% String s = null; String[] question = new String[4]; s = request.getRealPath("question.txt"); question = getQuestion(s); %＞ ＜html＞ ＜head＞ ＜title＞＜/title＞ ＜link href="css.css" rel="StyleSheet" type="text/css"＞＜/link＞ ＜/head＞ ＜body＞ ＜table width="180" border="1" bordercolor="#999999"＞ ＜tr＞ ＜td align=center＞冰帆调查＜/td＞ ＜/tr＞ ＜form name=frm method=post action=write.jsp＞ ＜tr＞ ＜td＞ ＜% String ss = null; for (int i=0;i＜4;i++) { ss = "＜input type=\"radio\" name=\"choice\" value=" + I + "＞" + (char)('A'+i) + "、" + question[i]+"＜br＞"; out.println(ss); } %＞ ＜/td＞ ＜/tr＞ ＜tr＞ ＜td align=center＞＜input type=submit value="我 投 一 票"＞＜/td＞ ＜/tr＞ ＜tr＞ ＜td align=center＞＜img src="/vote/servlet/VoteImage" width=150 height=100＞ ＜/td＞ ＜/tr＞ ＜/form＞ ＜/table＞ ＜/body＞ ＜/html＞ |
＜%! public int[] getNumber(String s) { int[] mCount = new int[4]; String strTemp = null; int i; Java.io.RandomAccessFile rf = null; try { rf = new Java.io.RandomAccessFile(s,"r"); } catch(Exception e) { System.out.println(e); System.exit(0); } for(i=0;i＜4;i++) { try { strTemp = rf.readLine(); } catch(Exception e) { strTemp = "0"; } if(strTemp==null) strTemp = "0"; mCount[i] = new Integer(strTemp).intValue(); } return mCount; } public void setNumber(String s,int[] x) { try { Java.io.PrintWriter pw = new Java.io.PrintWriter(new Java.io.FileOutputStream(s)); for (int i=0;i＜4;i++) { pw.println(x[i]+""); } pw.close(); } catch(Exception e) { System.out.println("Write file error:"+e.getMessage()); } } %＞ ＜% String tmp = null; int choice = -1; int[] count = new int[4]; tmp = request.getParameter("choice"); if (tmp==null){ } else { choice = new Integer(tmp).intValue(); } String s = request.getRealPath("count.txt"); if (choice＞=0) { count = getNumber(s); count[choice]++; setNumber(s,count); } response.sendRedirect("index.jsp"); %＞ |
import Java.io.*; import Java.util.*; import com.sun.image.codec.jpeg.*; import Javax.servlet.*; import Javax.servlet.http.*; import Java.awt.*; import Java.awt.geom.*; import Java.awt.image.*; public class VoteImage extends HttpServlet { private String strFile = null; private Color color[]={Color.red,Color.black,Color.orange,Color.green}; private int baseAng = 30; public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException { strFile = request.getRealPath("count.txt"); float[][] xy = new float[4][2]; xy = getNumAndPercent(strFile); int[] ang = new int[4]; ang[0] = (int)(xy[0][1]*360); ang[1] = (int)(xy[1][1]*360); ang[2] = (int)(xy[2][1]*360); ang[3] = 360-ang[0]-ang[1]-ang[2]; response.setHeader("Cache-Control","no-store"); response.setDateHeader("Expires",0); response.setContentType("image/jpeg"); ServletOutputStream out=response.getOutputStream(); BufferedImage image = new BufferedImage ( 150 , 100 , BufferedImage. TYPE_INT_RGB); Graphics2D g = (Graphics2D)image.getGraphics(); g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON); g.setColor(Color.white); g.fillRect(0,0,150,100); AffineTransform at = null; Arc2D arc = null; int fromAng = baseAng; at = AffineTransform.getRotateInstance((-20*Java.lang.Math.PI)/180,45,37); g.setTransform(at); int r =6; int dx = (int) ( r * Java.lang.Math.cos ( ( baseAng + ang[0] ) / 2.0 * Java.lang.Math.PI / 180 ) ); int dy = ( int ) ( r * Java.lang.Math.sin (( baseAng + ang[0] ) / 2.0 * Java.lang.Math.PI / 180 ) ); arc = new Arc2D.Double(10+dx,24-dy,80,50,fromAng,ang[0],Arc2D.PIE); g.setColor(color[0]); g.fill(arc); fromAng+=ang[0]; for (int i=1;i＜4;i++) { g.setColor(color[i]); arc = new Arc2D.Double(10,24,80,50,fromAng,ang[i],Arc2D.PIE); g.fill(arc); fromAng+=ang[i]; if (fromAng＞360) { fromAng-=360; } } at = AffineTransform.getRotateInstance(0,arc.getCenterX(),arc.getCenterY()); g.setTransform(at); for (int i=0;i＜4;i++) { g.setColor(color[i]); g.fillRect(100,15*i+20,10,10); g.drawString((char)('A'+i)+"",120,15*i+20+8); } JPEGImageEncoder encoder=JPEGCodec.createJPEGEncoder(out); encoder.encode(image); out.close(); } public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException { doGet(request,response); } public synchronized float[][] getNumAndPercent(String sFileName) { float xx[][] = new float[4][2]; int totalNum = 0 ; String strTemp = null; int i = 0; Java.io.RandomAccessFile rf = null; try { rf = new Java.io.RandomAccessFile (sFileName,"r"); } catch(Exception e) { System.out.println(e); System.exit(0); } for (i=0;i＜4;i++) { int m=0; try { strTemp = rf.readLine(); } catch (Exception e){ strTemp = "0"; } if (strTemp == null) strTemp = "0"; m = new Integer(strTemp).intValue(); xx[i][0]=m; totalNum += m; } if (totalNum==0) totalNum=1; for ( i=0;i＜4;i++) { xx[i][1] = xx[i][0]/totalNum; } return xx; } } |
question.txt: Yes,I think so! No,I dont think so! Sorry,I dont know the answer! count.txt: 12 9 5 9 |
