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web.xml里面可以定義兩種參數(shù)： (1)application范圍內(nèi)的參數(shù)，存放在servletcontext中，在web.xml中配置如下：

<context-param>

<param-name>context/param</param-name>

<param-value>avalible during application</param-value>

</context-param>

(2)servlet范圍內(nèi)的參數(shù)，只能在servlet的init()方法中取得，在web.xml中配置如下：

<servlet-name>MainServlet</servlet-name>

<servlet-class>com.wes.controller.MainServlet</servlet-class>

<init-param>

<param-name>param1</param-name>

<param-value>avalible in servlet init()</param-value>

</init-param>

<load-on-startup>0</load-on-startup>

</servlet>

在servlet中可以通過(guò)代碼分別取用：

package com.wes.controller;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

public class MainServlet extends HttpServlet {

public MainServlet() {

super();

}

public void init() throws ServletException {

System.out.println("下面的兩個(gè)參數(shù)param1是在servlet中存放的");

System.out.println(this.getInitParameter("param1"));

System.out.println("下面的參數(shù)是存放在servletcontext中的");

System.out.println(getServletContext().getInitParameter("context/param"));

}

posted on 2008-07-12 19:17 CONAN 閱讀(246) 評(píng)論(0) 編輯收藏所屬分類(lèi): J2EE