环境配置

1.创建Maven的Web项目

2.pom.xml配置

<dependencies>
    <!--    spring web-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.3.2.RELEASE</version>
    </dependency>

    <!--    spring mvc-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.2.RELEASE</version>
    </dependency>

    <!--    web servlet-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.0.1</version>
    </dependency>
  </dependencies>
 <!--          编译环境部署-->
        <plugin>
          <groupId>org.mortbay.jetty</groupId>
          <artifactId>maven-jetty-plugin</artifactId>
          <version>6.1.25</version>
          <configuration>
            <scanIntervalSeconds>10</scanIntervalSeconds>
            <contextPath>/springmvc1</contextPath>
          </configuration>
        </plugin>

3.web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
	      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">

  <!-- 配置前端控制器 -->
  <servlet>
    <servlet-name>mvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:mvc.xml</param-value>
    </init-param>
<!--    启动容器初始化该Servlet-->
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>mvc</servlet-name>
<!--    拦截请求-->
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

  <!-- 字符编码过滤器 -->
  <filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>

  <filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

</web-app>

4.1 手动配置方式

• mvc.xml

<!--    手动配置配置controller路径-->
    <bean name="/test" class="controller.MyController1"></bean>
<!--    处理器映射器-->
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
<!--    处理器设配器-->
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
    <!--    视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"></bean>

• MyController1

public class MyController1 implements Controller {
    @Override
    public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("msg", "Hello world");
        modelAndView.setViewName("/index.jsp");
        return modelAndView;
    }
}

4.2 注解方式

• 在resources目录下配置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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd 
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context.xsd">

    <context:component-scan base-package="org.xxx.springmvc.controller"></context:component-scan>
    <mvc:annotation-driven/>

<!--    视图解析器-->
    <bean id="defaultViewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
        <property name="contentType" value="text/html"></property>
        <property name="prefix" value="/WEB-INF/jsp/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

• Controller层

@Controller
public class HelloController {
    @RequestMapping("hello")
    public ModelAndView hello(){
        ModelAndView mv=new ModelAndView();
        /*
            模型数据：Model
            视图：View
         */
        mv.addObject("hello","Hello SpringMVC");
        mv.setViewName("hello");
        return mv;
    }
}

5.hello.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    ${hello}
</body>
</html>

6.配置tomcat

访问hello.do