Spring MVC 配置和实例

1、配置Maven，加入Spring mvc的依赖。网址：http://mvnrepository.org/

2、加入servlet-api的jar包。       

3、配置web.xml 和spring-mvc.xml 

4、写controller类。

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.bb</groupId>    <artifactId>bb</artifactId>    <packaging>war</packaging>    <version>0.0.1-SNAPSHOT</version>    <name>bb Maven Webapp</name>    <url>http://maven.apache.org</url>    <dependencies>        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>4.0.9.RELEASE</version>        </dependency>        <!-- 添加junit4依赖 -->        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.11</version>            <!-- 指定范围，在测试时才会加载 -->            <scope>test</scope>        </dependency>    </dependencies>    <build>        <finalName>bb</finalName>        <plugins>            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-compiler-plugin</artifactId>                <version>3.6.1</version>                <configuration>                    <source>1.8</source>                    <target>1.8</target>                </configuration>            </plugin>        </plugins>    </build></project>

web.xml

<?xml version="1.0" 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">    <display-name>bb</display-name>    <!-- spring mvc servlet-->    <servlet>        <servlet-name>SpringMVC</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:spring-mvc.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup>        <async-supported>true</async-supported>    </servlet>    <servlet-mapping>        <servlet-name>SpringMVC</servlet-name>        <!-- 此处也可以配置成 *.do 形式 -->        <url-pattern>*.do</url-pattern>    </servlet-mapping>    <welcome-file-list>        <welcome-file>/index.jsp</welcome-file>    </welcome-file-list></web-app>

spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"       xmlns:context="http://www.springframework.org/schema/context"       xmlns:mvc="http://www.springframework.org/schema/mvc"       xsi:schemaLocation="http://www.springframework.org/schema/beans                        http://www.springframework.org/schema/beans/spring-beans-4.0.xsd                        http://www.springframework.org/schema/context                        http://www.springframework.org/schema/context/spring-context-4.0.xsd                        http://www.springframework.org/schema/mvc                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">    <!-- 自动扫描  @Controller-->    <context:component-scan base-package="com.controller;"/></beans>

controller.java

package com.controller;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;@Controllerpublic class UserController {    @RequestMapping("helloworld")    public void helloworld(HttpServletRequest request, HttpServletResponse response) throws IOException{        response.getWriter().write("welcome");    }}