<!--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;

@Service

public 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>