package com.pas.web;import java.io.IOException;import java.io.PrintWriter;import java.util.Enumeration;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.omg.CORBA.Environment;public class ServletConfigTest extends HttpServlet {		public void doGet(HttpServletRequest request, HttpServletResponse response)			throws ServletException, IOException {		response.setCharacterEncoding(this.getServletConfig().getInitParameter("encoding"));		response.getWriter().println("你好世界aaaa");				Enumeration
    
      en= this.getServletConfig().getInitParameterNames();		String lineSeparator = System.getProperty("line.separator", "/n"); 		while(en.hasMoreElements())		{			response.getWriter().println(en.nextElement()+lineSeparator);		}	}		public void doPost(HttpServletRequest request, HttpServletResponse response)			throws ServletException, IOException {		this.doGet(request, response);	}}
    

Web.XML

        
     
      This is the description of my J2EE component
         
     
      This is the display name of my J2EE component
         
     
      ServletConfigTest
         
     
      com.pas.web.ServletConfigTest
       	
       		
      
       encoding
        		
      
       gb2312
        	
       
    

    
          
     
      context_param
          
     
      value3
       
    

此类设置对应web应用全局访问：

this.getServletContext().getInitParameter("context_param")