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不需要xml
- package com.journaldev.first;
- import java.io.IOException;
- import java.io.PrintWriter;
- import java.util.Date;
- import javax.servlet.ServletException;
- import javax.servlet.annotation.WebInitParam;
- import javax.servlet.annotation.WebServlet;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- /**
- * Servlet implementation class FirstServlet
- */
- @WebServlet(description = "My First Servlet", urlPatterns = { "/FirstServlet" , "/FirstServlet.do"}, initParams = {@WebInitParam(name="id",value="1"),@WebInitParam(name="name",value="pankaj")})
- public class FirstServlet extends HttpServlet {
- private static final long serialVersionUID = 1L;
- public static final String HTML_START="<html><body>";
- public static final String HTML_END="</body></html>";
-
- /**
- * @see HttpServlet#HttpServlet()
- */
- public FirstServlet() {
- super();
- // TODO Auto-generated constructor stub
- }
- /**
- * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
- */
- protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- PrintWriter out = response.getWriter();
- Date date = new Date();
- out.println(HTML_START + "<h2>Hi There!</h2><br/><h3>Date="+date +"</h3>"+HTML_END);
- }
- /**
- * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
- */
- protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- // TODO Auto-generated method stub
- }
- }
2.spring mvc实现页面访问
2.1 web.xml方式
示例：
- <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
- http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
- version="2.5">
- <display-name>Gradle + Spring MVC Hello World + XML</display-name>
- <description>Spring MVC web application</description>
- <!-- For web context -->
- <servlet>
- <servlet-name>hello-dispatcher</servlet-name>
- <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
- <init-param>
- <param-name>contextConfigLocation</param-name>
- <param-value>/WEB-INF/spring-mvc-config.xml</param-value>
- </init-param>
- <load-on-startup>1</load-on-startup>
- </servlet>
- <servlet-mapping>
- <servlet-name>hello-dispatcher</servlet-name>
- <url-pattern>/</url-pattern>
- </servlet-mapping>
- <!-- For root context -->
- <listener>
- <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
- </listener>
- <context-param>
- <param-name>contextConfigLocation</param-name>
- <param-value>/WEB-INF/spring-core-config.xml</param-value>
- </context-param>
- </web-app>
（编辑：核心网）
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