这里有个JAVA和CGI程序结合的访问计数器的例子. 其实单纯做访问计数器

				这里有个JAVA和CGI程序结合的访问计数器的例子. 
				其实单纯做访问计数器，只有CGI就够了. 
				但希望统计用户访问该主页的时间时,只用CGI好象就不行了. (本例没有这个功能. :PPP) 
				 
				count.pl 
				-------------------------------------------------------------- 
				#!/usr/local/bin/perl 
				# Increments a visit count stored in the file named 
				# "counter" and send the count as a plain text document. 
				 
				# Print a minimal MIME header 
				    print "Content-type: text/plain\n\n"; 
				 
				    $counterfile = "counter"; 
				 
				# Open the counter file and get current count 
				    open(COUNTER, "$counterfile"); 
				 
				# Lock the file to guard against another process updating the 
				# file as this script uses it 
				    $lock_exclusive = 2; 
				    $unlock = 8; 
				    flock(COUNTER, $lock_exclusive); 
				 
				# Read and increment the count 
				    $line = ; 
				    close(COUNTER); 
				 
				    chop($line); 
				    $count = $line; 
				    $count++; 
				 
				# Save the new count in the file 
				    open(COUNTER, ">$counterfile"); 
				    print COUNTER ("$count\n"); 
				    close(COUNTER);     
				         
				# Remember to unlock the file 
				    flock(COUNTER, $unlock); 
				 
				# Send count to caller 
				    print "$count\n";    
				------------------------------------------------------------ 
				VisitCount.java 
				 
				---------------------------------------------------------- 
				//--------------------------------------------------------------- 
				// File: VisitCount.java 
				// Accesses a CGI program to update visit count and display 
				// the current count. 
				// Compile with: javac VisitCount.java 
				/* 
				 * The VisitCount class is a Java applet that accesses a CGI  
				 * program at the host URL and retrieves the visitor count (the  
				 * CGI program also updates the count). Then it displays the  
				 * current count. Use an  tag to embed this applet 
				 * at the location where you want to display the count. 
				*/ 
				//--------------------------------------------------------------- 
				import java.awt.*; 
				import java.applet.*; 
				import java.net.*; 
				import java.io.*; 
				public class VisitCount extends java.applet.Applet 
				{ 
				    String visitCount;  // String to store visitor count  
				// Class initialization method 
				    public void init() 
				    { 
				        try 
				        { 
				// Open the URL that counts visitors to this site 
				// *** Edit URL before using at your site *** 
				            URL url = new URL( 
				              "http://www.lnbsoft.com/exec-bin/count.pl?update=1"); 
				 
				// Open a data stream and read a single line  
				            try 
				            { 
				                DataInputStream in = new  
				                    DataInputStream(url.openStream()); 
				                visitCount = in.readLine(); 
				            } 
				            catch(IOException e) {} 
				        } 
				        catch(MalformedURLException e) {} 
				    } 
				// Method that paints the output 
				    public void paint(java.awt.Graphics gc) 
				    { 
				// Display the visitor count that was read from the URL 
				// Use whatever font style and color you want 
				// I used Helvetica for a message and a Courier font 
				// for the visitor count 
				 
				        Font helv = new Font("Helvetica", Font.BOLD, 16); 
				        Font courier = new Font("Courier", Font.BOLD, 24); 
				 
				        gc.setFont(helv); 
				        FontMetrics fm = gc.getFontMetrics(); 
				        String message = "Visitor number: "; 
				        int xstart = 0; 
				        int ystart = fm.getHeight(); 
				        gc.drawString(message, xstart, ystart); 
				 
				// Advance horizontally by amount needed to display message 
				        xstart += fm.stringWidth(message); 
				 
				// Change font to Courier and display the count 
				        gc.setFont(courier); 
				        gc.setColor(Color.red); 
				        gc.drawString(visitCount, xstart, ystart); 
				    } 
				}        
				----------------------------------------------------------------- 
				 
				HTML文件中调用方法.