servlet 生存周期测试

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Static.java

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import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class StaticCount extends HttpServlet{
 static int classCount = 0 ;
 int count = 0 ;
 static Hashtable instances = new Hashtable() ;

 public void doGet(HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException{
  res.setContentType("text/html") ;
  PrintWriter out = res.getWriter() ;
  
  count ++ ;
  out.println("Since loading,this servlet has been accessed " + count + " times.") ;
  instances.put(this,this) ;
  out.println("There are currently "+ instances.size() + " instances.") ;

  classCount ++ ;
  out.println("Across all instances,this servlet class has been " + "accessed " + classCount + " times.");
 }

 public String getServletInfo(){
  return "A servlet that knows the name of the person to whom it;s" + "saying hello" ;
 }
}

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