1：創(chuàng)建一個maven的web項目參照上一篇文章

2：使用maven撇簿，在pom.xml中導入Spring框架毒租，下面部分框架實際沒有用到

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
    <spring.version>5.0.5.RELEASE</spring.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

    <!-- spring -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!-- servlet -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>

  </dependencies>

3：修改web.xml文件掌腰，在web-app標簽中添加

<servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

說明：加載web.xml后會去查找一個<servlet-name>為dispatcher-servlet.xml的文件

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4：手動增加dispatcher-servlet.xml文件

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dispatcher-servlet.xml內(nèi)容如下：

<?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-3.1.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd
                        http://www.springframework.org/schema/mvc
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

    <!-- 自動掃描@Controller注入為bean -->
    <context:component-scan base-package="com.springmvc.helloworld"/>
    <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

說明：com.springmvc.helloworld是你的包名澈魄，此處還沒有創(chuàng)建吵瞻，所以為紅色
 <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
這里已經(jīng)指定jsp的路徑和后綴名惧笛，在之后的返回中無需制定路徑

5：創(chuàng)建java文件从媚，新建一個java文件夾，并修飾為Sources患整，接著創(chuàng)建包com.springmvc.helloworld和java文件

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注解@Controller：聲明HiController類是一個 SpringMVC Controller類
注解@RequestMapping：添加請求url映射地址拜效，此處的url變成：http://localhost:8080/hi/say

6：創(chuàng)建一個say.jsp作為HiController類中say()方法的返回

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7：直接啟動tomcat喷众，報錯了

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絕大部分的錯誤都是缺少依賴庫，檢測pom.xml
這里的錯誤顯示：項目缺少org.springframework.web.servlet.DispatcherServlet
但是我們在maven中已經(jīng)加入了紧憾，此時我們應(yīng)該想到是否沒有引用到項目中到千，查看Configurations，點擊下圖中的位置

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8：重啟tomcat憔四，輸入http://localhost:8080/hi/say

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