如何从context-param获取参数？

3.从context-param获取：
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>

更多请见：http://www.mark-to-win.com/index.html?content=Jsp/jspUrl.html&chapter=Jsp/jsp2_web.html#GetParamWithcontext-param

 

来源：CSDN

作者：qq_44594371

链接：https://blog.csdn.net/qq_44594371/article/details/103157577