济南网站制作哪家专业,河南seo公司,什么系统做网站好,一级做ae视频教程是什么 ServletConfig是javax.servlet.包下的一个接口#xff0c;ServletConfig它是Servlet的一个配置对象#xff1b; ServletConfig是由tomcat容器创建#xff0c;通过init方法传入给Servlet#xff1b; ServletConfig对象如何获取? 在GenericServlet里面定义了#x… 是什么 ServletConfig是javax.servlet.包下的一个接口ServletConfig它是Servlet的一个配置对象 ServletConfig是由tomcat容器创建通过init方法传入给Servlet ServletConfig对象如何获取? 在GenericServlet里面定义了
public ServletConfig getServletConfig() {return this.config;
} 常用方法
getInitParameter(String parameterName); //根据参数名称获取指定的参数值
getInitParameterNames(); //获取所有的参数名称 在web.xml文件中配置一下
servletservlet-nameServletConfigServlet/servlet-nameservlet-classcom.by.servlet.ServletConfigServlet/servlet-classinit-paramparam-nameusername/param-nameparam-valueTom/param-value/init-paraminit-paramparam-namepassword/param-nameparam-value123/param-value/init-param/servletservlet-mappingservlet-nameServletConfigServlet/servlet-nameurl-pattern/servletConfigServlet/url-pattern/servlet-mapping 在ServletConfigServlet这个类中调用一下
/** Copyright (c) 2020, 2023, All rights reserved.**/
package com.by.servlet;import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;/*** pProject: JavaWeb-Servlet - ServletConfigServlet/p* pPowered by scl On 2023-12-26 15:52:05/p* p描述p** author 孙臣龙 [1846080280qq.com]* version 1.0* since 17*/
public class ServletConfigServlet extends HttpServlet {Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {doPost(req, resp);}Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {ServletConfig servletConfig getServletConfig();String username servletConfig.getInitParameter(username);String password servletConfig.getInitParameter(password);System.out.println(usernamepassword);}
}
结果展示
