SSM整合

mybatise和sping整合

spring-dao.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: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.xsd">

    <!--配置整合mybatis过程
    1.配置数据库相关参数-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!--2.数据库连接池-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!--配置连接池属性-->
        <property name="driverClass" value="${driver}" />

        <!-- 基本属性 url、user、password -->
        <property name="jdbcUrl" value="${url}" />
        <property name="user" value="${username}" />
        <property name="password" value="${password}" />

        <!--c3p0私有属性-->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!--关闭连接后不自动commit-->
        <property name="autoCommitOnClose" value="false"/>

        <!--获取连接超时时间-->
        <property name="checkoutTimeout" value="1000"/>
        <!--当获取连接失败重试次数-->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <!--约定大于配置-->
    <!--３.配置SqlSessionFactory对象-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--往下才是mybatis和spring真正整合的配置-->
        <!--注入数据库连接池-->
        <property name="dataSource" ref="dataSource"/>
        <!--配置mybatis全局配置文件:mybatis-config.xml-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!--扫描entity包,使用别名,多个用;隔开-->
        <property name="typeAliasesPackage" value="cn.codingxiaxw.entity"/>
        <!--扫描sql配置文件:mapper需要的xml文件-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    </bean>

    <!--４:配置扫描Dao接口包,动态实现DAO接口,注入到spring容器-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入SqlSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 给出需要扫描的Dao接口-->
        <property name="basePackage" value="cn.codingxiaxw.dao"/>
    </bean>
</beans>

 jdbc.properties

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/seckill?useUnicode=true&characterEncoding=utf-8
username=root
password=

web.xml

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0"
         metadata-complete="true">
<!--用maven创建的web-app需要修改servlet的版本为3.1-->
<!--配置DispatcherServlet-->
    <servlet>
        <servlet-name>seckill-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--
            配置SpringMVC 需要配置的文件
            spring-dao.xml，spring-service.xml,spring-web.xml
            Mybites -> spring -> springMvc
        -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/spring-*.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>seckill-dispatcher</servlet-name>
        <!--默认匹配所有请求-->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

spring-web.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: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.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--配置spring mvc-->
    <!--1,开启springmvc注解模式
    a.自动注册DefaultAnnotationHandlerMapping,AnnotationMethodHandlerAdapter
    b.默认提供一系列的功能:数据绑定，数字和日期的format@NumberFormat,@DateTimeFormat
    c:xml,json的默认读写支持-->
    <mvc:annotation-driven/>

    <!--2.静态资源默认servlet配置-->
    <!--
        1).加入对静态资源处理：js,gif,png
        2).允许使用 "/" 做整体映射
    -->
    <mvc:default-servlet-handler/>

    <!--3：配置JSP 显示ViewResolver-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--4:扫描web相关的bean-->
    <context:component-scan base-package="cn.codingxiaxw.web"/>
</beans>

 spring-service

<?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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
       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.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!--扫描service包下所有使用注解的类型-->
    <context:component-scan base-package="cn.codingxiaxw.service"/>

    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据库连接池-->
        <property name="dataSource" ref="dataSource"/>

    </bean>

    <!--配置基于注解的声明式事务
    默认使用注解来管理事务行为-->
    <tx:annotation-driven transaction-manager="transactionManager"/>



</beans>

 mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!--配置全局属性-->
    <settings>
        <!--使用jdbc的getGeneratekeys获取自增主键值-->
        <setting name="useGeneratedKeys" value="true"/>
        <!--使用列别名替换列名　　默认值为true
        select name as title(实体中的属性名是title) form table;
        开启后mybatis会自动帮我们把表中name的值赋到对应实体的title属性中
        -->
        <setting name="useColumnLabel" value="true"/>

        <!--开启驼峰命名转换Table:create_time到 Entity(createTime)-->
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>

</configuration>