servlet 初始化参数和上下文参数 

 1   <!-- init(初始化)参数的调用 -->
 2   <servlet>
 3       <servlet-name>InitTest</servlet-name>
 4       <servlet-class>com.cqq.servlet.InitTestServlet</servlet-class>
 5       <init-param>
 6         <param-name>getInit</param-name>
 7         <param-value>Init的value</param-value>
 8     </init-param>
 9   </servlet>
10   <servlet-mapping>
11       <servlet-name>InitTest</servlet-name>
12       <url-pattern>/InitTest</url-pattern>
13   </servlet-mapping>
 <!-- 上下文参数 -->
  <context-param>
  	<param-name>contextPrm</param-name>
  	<param-value>这是上下文参数context param</param-value>
  </context-param>

　　调用的方法示例

	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
			String getInit=getInitParameter("getInit");//初始化参数
			resp.setContentType("text");//不加乱码
			resp.getWriter().print(getInit);
			String contextprm=this.getServletContext().getInitParameter("contextPrm");//上下文参数
			resp.getWriter().println(contextprm);
	}
}

　　

posted @ 2018-05-09 03:03  爱学习的TOM  阅读(2129)  评论(0)  编辑  收藏  举报