shop--4.SSM的各项配置

在resources下建jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/o2o?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456

配置mybatis相关配置文件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getGeneratedKeys获取数据库自增主键值 -->
    <setting name="useGeneratedKeys" value="true"/>
    
    <!-- 使用列标签替换列别名,默认:true -->
    <setting name="useColumnLabel" value="true"/>
    
    <!-- 开启驼峰命名转换：Table{create_time}->Entity{createTime} -->
    <setting name="mapUnderscoreToCamelCase" value="true"/>
  </settings>
</configuration>

在resources/spring下配置Spring的配置文件

1)dao层的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properties的属性：${url} -->  
    <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="${jdbc.driver}" />  
        <property name="jdbcUrl" value="${jdbc.url}" />  
        <property name="user" value="${jdbc.username}" />  
        <property name="password" value="${jdbc.password}" />  
  
        <!-- c3p0连接池的私有属性 -->
        <property name="maxPoolSize" value="30" />  
        <property name="minPoolSize" value="10" /> 
        <!-- 关闭连接后不自动commit -->  
        <property name="autoCommitOnClose" value="false" />  
        <!-- 当获取连接失败重试次数 -->  
        <property name="acquireRetryAttempts" value="2" /> 
        <!-- 两次连接中间隔1000毫秒。 -->
        <property name="checkoutTimeout" value="10000"/> 
    </bean>  
  
    <!-- 3.配置SqlSessionFactory对象 -->  
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
        <!-- 注入数据库连接池 -->  
        <property name="dataSource" ref="dataSource" />  
        <!-- 配置MyBaties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 -->  
        <property name="typeAliasesPackage" value="com.ryanxu.o2o.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soring容器中 -->  
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
        <!-- 注入sqlSessionFactory -->  
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />  
        <!-- 给出需要扫描Dao接口包 -->  
        <property name="basePackage" value="com.ryanxu.o2o.dao" />  
    </bean>  
   
  
</beans>  

2）配置service层的spring-service.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: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="com.ryanxu.o2o.service" />  
  
    <!-- 配置事务管理器  保证原子性-->  
    <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 -->  
    <tx:annotation-driven transaction-manager="transactionManager" />  
</beans>  

3)controller层 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-3.2.xsd">
    <!-- 配置SpringMVC -->
    <!-- 1.开启SpringMVC注解模式 -->
    <!-- 简化配置： (1)自动注册DefaultAnootationHandlerMapping,AnotationMethodHandlerAdapter 
        (2)提供一些列：数据绑定，数字和日期的format @NumberFormat, @DateTimeFormat, xml,json默认读写支持 -->
    <mvc:annotation-driven />

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

    <!-- 3.定义视图解析器 -->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/html/"></property>
        <property name="suffix" value=".html"></property>
    </bean>
    <!-- 在spring-mvc.xml文件中加入这段配置后，spring返回给页面的都是utf-8编码了 -->
    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <bean
                    class="org.springframework.http.converter.StringHttpMessageConverter">
                    <property name="supportedMediaTypes">
                        <list>
                            <value>text/html;charset=UTF-8</value>
                        </list>
                    </property>
                </bean>
            </list>
        </property>
    </bean>
    <!-- 4.扫描web相关的bean -->
    <context:component-scan base-package="com.ryanxu.o2o.web" />

</beans>

将spring的配置整合在一起

配置web.xml

<!-- 配置DispatcherServlet -->
  <servlet>
    <servlet-name>spring-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- 配置springMVC需要加载的配置文件 spring-dao.xml,spring-service.xml,spring-web.xml
        Mybatis - > spring -> springmvc -->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring/spring-*.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>spring-dispatcher</servlet-name>
    <!-- 默认匹配所有的请求 -->
    <url-pattern>/</url-pattern>
  </servlet-mapping>