<!--添加spring-web包 --><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-web</artifactId>    <version>4.1.4.RELEASE</version></dependency>

<?xml version="1.0" encoding="UTF-8"?><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" id="WebApp_ID" version="3.0">  <welcome-file-list>    <welcome-file>index.jsp</welcome-file>  </welcome-file-list>  <listener>    <description>Spring容器启动监听器</description>    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  </listener>  <context-param>    <param-name>contextConfigLocation</param-name>    <param-value>classpath*:ApplicationContext.xml</param-value>  </context-param></web-app>

package com.lmei.service;import java.util.List;import javax.annotation.Resource;import org.springframework.stereotype.Service;import com.lmei.dao.BookDaoI;import com.lmei.entity.Book;@Servicepublic class BookService {    @Resource    BookDaoI bookDao;    public List<Book> getAllBook() {        return bookDao.getAllBook();    }}

package com.lmei.action;import java.io.IOException;import java.io.PrintWriter;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 org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;import com.lmei.service.BookService;@WebServlet("/BookServlet.do")public class BookServlet extends HttpServlet {    private static final long serialVersionUID = 1L;        BookService bookService;         @Override    public void init() throws ServletException {      //在当前上下文中获得Spring容器      WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(getServletContext());      //从容器中获得bean      bookService = ctx.getBean(BookService.class);    }    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        PrintWriter writer = response.getWriter();        writer.print(bookService.getAllBook().size());    }    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        doGet(request, response);    }}

    <!--自动扫描映射接口-->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <!-- 指定sql会话工厂，在上面配置过的 -->        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>        <!-- 指定基础包，即自动扫描com.lmei.dao这个包下的所有接口类 -->        <property name="basePackage" value="com.lmei.dao"></property>    </bean>            <!--自动扫描组件 -->    <context:component-scan base-package="com.lmei">        <context:exclude-filter type="aspectj" expression="com.lmei.dao.*"/>    </context:component-scan>    <aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy>

<?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:aop="http://www.springframework.org/schema/aop" 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/context        http://www.springframework.org/schema/context/spring-context-4.3.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">    <!-- 引入db.properties属性文件 -->    <context:property-placeholder location="classpath:db.properties" />    <!--定义一个jdbc数据源，创建一个驱动管理数据源的bean -->    <bean id="jdbcDataSource"        class="org.springframework.jdbc.datasource.DriverManagerDataSource">        <property name="driverClassName" value="${jdbc.driver}" />        <property name="url" value="${jdbc.url}" />        <property name="username" value="${jdbc.username}" />        <property name="password" value="${jdbc.password}" />    </bean>            <!--创建一个sql会话工厂bean，指定数据源 -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <!-- 指定数据源 -->        <property name="dataSource" ref="jdbcDataSource" />        <!--类型别名包，默认引入com.lmei.entity下的所有类 -->        <property name="typeAliasesPackage" value="com.lmei.entity"></property>        <!--指定sql映射xml文件的路径 -->        <property name="mapperLocations"            value="classpath:com/lmei/mapper/*Mapper.xml"></property>    </bean>        <!--自动扫描映射接口-->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <!-- 指定sql会话工厂，在上面配置过的 -->        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>        <!-- 指定基础包，即自动扫描com.lmei.dao这个包下的所有接口类 -->        <property name="basePackage" value="com.lmei.dao"></property>    </bean>              <!--自动扫描组件 -->    <context:component-scan base-package="com.lmei">        <context:exclude-filter type="aspectj" expression="com.lmei.dao.*"/>    </context:component-scan>    <aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy></beans>