使用maven搭建web项目

在pom.xml中添加java ee相关的三个依赖包：<scope> jar的有效范围 provided 表示编译期生效,不会打包发布到 tomcat 中

     <properties>
           <servlet-version>3.0.1</servlet-version>
           <jsp-version>2.2</jsp-version>
           <jstl-version>1.2</jstl-version>
     </properties>
     <dependencies>
           <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>3.8.1</version>
                <scope>test</scope>
           </dependency>
           <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>${servlet-version}</version>
                <scope>provided</scope>
           </dependency>
           <dependency>
                <groupId>javax.servlet.jsp</groupId>
                <artifactId>jsp-api</artifactId>
                <version>${jsp-version}</version>
                <scope>provided</scope>
           </dependency>
           <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
                <version>${jstl-version}</version>
           </dependency>
     </dependencies>

在pom.xml中配置 tomcat 插件

     <build>
          <plugins>
              <plugin>
                   <groupId>org.apache.tomcat.maven</groupId>
                   <artifactId>tomcat7-maven-plugin</artifactId>
                   <version>2.2</version>
                   <configuration>
                        <!-- tomcat端口号 -->
                        <port>80</port>
                        <!-- 项目发布到tomcat后的名称，/ 相当于把项目发布名称为ROOT，名称格式：/cppdy -->
                        <path>/</path>
                   </configuration>
              </plugin>
          </plugins>
     </build>

右键项目--> run as --> maven build-->Goals 中输入clean tomcat7:run

打开浏览器访问localhost