SSM配置Druid数据源，并在其中配置了mapper接口和url，系统提示无法找到？

Question

一。我在application.properities里面配置了druid基本数据参数，然后在spring-db中扫描到了application文件，然后配置了数据库连接池，并在连接池中配置了mapper.xml文件，为什么系统还报错？

项目的结构

spring-db.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:p="http://www.springframework.org/schema/p"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.2.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
    http://www.springframework.org/schema/data/jpa
    http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">


    <context:component-scan base-package="cn.cwm.springboot.service.imp" />
    <context:property-placeholder location="classpath:/*.properties" />


    <!-- 数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          init-method="init" destroy-method="close">
        <!-- 数据库基本信息配置 -->
        <property name="url" value="${druid.url}" />
        <property name="username" value="${druid.username}" />
        <property name="password" value="${druid.password}" />
        <property name = "driverClassName" value = "${druid.driverClassName}" />

        <!-- 初始化连接数量 -->
        <property name="initialSize" value="${druid.initialSize}" />
        <!-- 最小空闲连接数 -->
        <property name="minIdle" value="${druid.minIdle}" />
        <!-- 最大并发连接数 -->
        <property name="maxActive" value="${druid.maxActive}" />
        <!-- 配置获取连接等待超时的时间 -->
        <property name="maxWait" value="${druid.maxWait}" />

        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="${druid.timeBetweenEvictionRunsMillis}" />

        <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="${druid.minEvictableIdleTimeMillis}" />
        <property name="validationQuery" value="${druid.validationQuery}" />
        <property name="testWhileIdle" value="${druid.testWhileIdle}" />
        <property name="testOnBorrow" value="${druid.testOnBorrow}" />
        <property name="testOnReturn" value="${druid.testOnReturn}" />

        <!-- 打开PSCache，并且指定每个连接上PSCache的大小 如果用Oracle，则把poolPreparedStatements配置为true，mysql可以配置为false。 -->
        <property name="poolPreparedStatements" value="${druid.poolPreparedStatements}" />
        <property name="maxPoolPreparedStatementPerConnectionSize"
                  value="${druid.maxPoolPreparedStatementPerConnectionSize}" />

        <!-- 配置监控统计拦截的filters -->
        <property name="filters" value="${druid.filters}" />
    </bean>


    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation" value="classpath:static/mybatis-config.xml"/>
        <property name="mapperLocations" value="classpath:/cn/cwm/springboot/mapper/*Mapper.xml" />
        <property name="typeAliasesPackage" value="${daoEntityLocation}" />

    </bean>


    <!-- 配置mybatis mapper接口 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="${daoEntityLocation}" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>


    <!-- 事务配置 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- 使用annotation注解方式配置事务 -->
    <tx:annotation-driven transaction-manager="transactionManager" />

</beans>

application.properitswen文件，在没有加上spring.datasource.url=jdbc:mysql://localhost:3306/book_store这句话之前，都显示找不到合适的url，但是我已经配置了druid啊！难道还需要另配吗

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/book_store

druid.driverClassName=com.mysql.jdbc.Driver 
druid.url=jdbc:mysql://localhost:3306/book_store
druid.username=root
druid.password=123
druid.initialSize=10
druid.minIdle=6
druid.maxActive=50
druid.maxWait=60000
druid.timeBetweenEvictionRunsMillis=60000
druid.minEvictableIdleTimeMillis=300000
druid.validationQuery=SELECT 'x'
druid.testWhileIdle=true
druid.testOnBorrow=false
druid.testOnReturn=false
druid.poolPreparedStatements=false
druid.maxPoolPreparedStatementPerConnectionSize=20
druid.filters=wall,stat
#web层
#web包的位置
springwebImpLocation=cn.cwm.springboot.service.imp

#dao层
#实体类对象位置
daoEntityLocation=cn.cwm.springboot.bean

mapperPortLocation=cn.cwm.springboot.dao

现在我在配置了durid的情况下，还显示这个情况

到底是这么回事？

MapperScan的确可以解决我的问题，但是配置数据源还有什么用呢？

Answer 1

既然用springboot了，那我们就放弃xml，好不好😒