Servlet-得到web.xml配置參數信息

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<String> 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

<servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>ServletConfigTest</servlet-name>
    <servlet-class>com.pas.web.ServletConfigTest</servlet-class>
  	<init-param>
  		<param-name>encoding</param-name>
  		<param-value>gb2312</param-value>
  	</init-param>
  </servlet>

<context-param>
     <param-name>context_param</param-name>
     <param-value>value3</param-value>
  </context-param>

此類設置對應web應用全局訪問：

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