实现HttpServlet的Web应用
<dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>2.2.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <plugin> <groupId>org.mortbay.jetty</groupId> <artifactId>jetty-maven-plugin</artifactId> <version>8.1.16.v20140903</version> <configuration> <scanIntervalSeconds>10</scanIntervalSeconds> <connectors> <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector"> <port>80</port> </connector> </connectors> <webAppConfig> <contextPath>/</contextPath> </webAppConfig> </configuration> </plugin>
import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet("/hello") public class MyServlet extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.setCharacterEncoding("utf-8"); resp.getWriter().write("Hello World!"); } public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); } }
使用SpringMVC的Web应用
<dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.14.RELEASE</version> </dependency> <plugin> <groupId>org.mortbay.jetty</groupId> <artifactId>jetty-maven-plugin</artifactId> <version>8.1.16.v20140903</version> <configuration> <scanIntervalSeconds>10</scanIntervalSeconds> <connectors> <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector"> <port>80</port> </connector> </connectors> <webAppConfig> <contextPath>/</contextPath> </webAppConfig> </configuration> </plugin>
<?xml version="1.1" encoding="UTF-8"?> <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_3_0.xsd" version="3.0"> <servlet> <servlet-name>myServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:my_spring_mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>myServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!-- Spring MVC提供的一键式配置方法,配置后Spring MVC会自动注册组件,比如映射器处理器、视图解析器等 --> <mvc:annotation-driven/> <!-- 包扫描 --> <!--<context:component-scan base-package="com.test"/>--> <!-- 包扫描,使用include-filter子标签设置只扫描@Controller,别的交给Spring容器去管理 --> <context:component-scan base-package="com" use-default-filters="false"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> </beans>
package com.test; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; @Controller public class MyController { @RequestMapping(value = "/", method = RequestMethod.GET) public String index(Model model) { model.addAttribute("msg", "Hello!"); // 如果没有配置视图解析器ViewResolver,SpringMVC将默认使用 // org.springframework.web.servlet.view.InternalResourceViewResolver作为ViewResolver, // 并且prefix和suffix都为空 return "/WEB-INF/my.jsp"; } }
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>My JSP</title> </head> <body> <p>${msg}</p> </body> </html>