counterservlet.java

该代码是《JSP应用与开发实例》一书的配套光盘

package com.jspdev.ch7;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class CounterServlet extends HttpServlet
{
	int counter=0;
	int org=0;
	
	/**
	 *处理doGet请求
	 */
	public void doGet(HttpServletRequest request,
                      HttpServletResponse response)
        throws IOException, ServletException
    {
        response.setContentType("text/html;charset=gb2312");
        PrintWriter out = response.getWriter();
        counter++;
        out.println("自从这个Servlet载入，它已经被访问了"+counter+"次，加上初始的配置，"+
        "这个Servlet共被访问了"+(org+counter)+"次");       
    }
    
    /**
     *初始化方法，获得初始参数
     */
    public void init() throws ServletException
    {
    	String c=getInitParameter("counter");
    	try
    	{
    		org=Integer.parseInt(c);
    	}
    	catch(Exception e)
    	{
    		e.printStackTrace();
    	}    
    }
    
        
}