如何从context-param获取参数?

2021-07-07 10:26:13 浏览数 (1)

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

更多请看下节:https://blog.csdn.net/qq_44591615/article/details/109249972

jsp

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