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import javaio*;
import javautil*;
import comsunimagecodecjpeg*;
import javaxservlet*;
import javaxservlet*;
import javaawt*;
import javaawtimage*;
public class JPEGServlet extends HttpServlet {
private String strFile="c:counttxt";
private Font mFont=new Font("Courier" FontBOLD);;
public void doGet(HttpServletRequest requestHttpServletResponse response)
throws ServletExceptionIOException {
String s;
int intCount;
s=getCount();
intCount=new Integer(s)intValue();
intCount=intCount+;
writeCount(intCount+"");
responsesetContentType("image/jpeg");
ServletOutputStream out=responsegetOutputStream();
BufferedImage image=new BufferedImage(BufferedImageTYPE_INT_RGB);
Graphics g=imagegetGraphics();
gsetColor(Colorblack);
gfillRect();
gsetColor(Colorwhite);
gsetFont(mFont);
char c;
for(int i=;i＜;i++) {
c=scharAt(i);
gdrawString(c+""i*+);
gdrawLine((i+)*(i+)*);
}
JPEGImageEncoder encoder=JPEGCodeccreateJPEGEncoder(out);
encoderencode(image);
outclose();
}
public void doPost(HttpServletRequest requestHttpServletResponse response)
throws ServletExceptionIOException {
doGet(requestresponse);
}
public synchronized void writeCount(String content) {
try {
PrintWriter pw = new PrintWriter(new FileOutputStream(strFile));
pwprintln(content);
pwclose();
} catch(IOException e) {
Systemoutprintln("Write file error:"+egetMessage());
}
}
public synchronized String getCount() {
String strCount;
int len;
int leftLen;
try {
BufferedReader inf = new BufferedReader(new FileReader(strFile));
strCount=infreadLine();
infclose();
} catch(Exception e) {
Systemoutprintln("Get counter error:"+egetMessage());
return reChar();
}
len=strCountlength();
if (len＜=) {
return reChar();
}
if (len＞) {
return reChar();
}
leftLen=len;
return reChar(leftLen)+strCount;
}
private String reChar(char cint num){
int i;
if (num＜=) return "";
String s="";
for(i=;i＜num;i++) {
s=s+c;
}
return s;
}
}
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