如何从context-param获取参数?

3.从context-param获取:
马克-to-win:用context-param存放的参数,本个web应用中的任何servlet,jsp都可以获得。

例:1.3.1

ServletHello1.java:

package com;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ServletHello1 extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        ServletContext servletContext = getServletContext();
        String jd =  servletContext.getInitParameter("zhangsan");
        System.out.println(jd);
    }
}
 

web.xml中,在任何“servlet标签对儿”的外面加入(因为context参数不属于任何特定的servlet,属于整个web应用):

 

    <context-param>
        <param-name>zhangsan</param-name>
        <param-value>1000</param-value>
    </context-param>

 

运行Servlet后,console中输出结果:

1000

更多内容请见原文,原文转载自:https://blog.csdn.net/qq_44591615/article/details/109249972

posted @ 2022-01-24 18:16  malala  阅读(102)  评论(0编辑  收藏  举报