一.学习spring的5个网站

1.spring官网

http://projects.spring.io/spring-framework/

2.spring-mvc-showcase

https://github.com/spring-projects/spring-mvc-showcase

3.spring宠物医院官方demo

https://github.com/spring-projects/spring-petclinic

4.spring下的绿房子

https://github.com/spring-projects/greenhouse

5.spring-boot

https://github.com/spring-projects/spring-boot

二.配置文件

5个配置文件:resources下的applicationContext.xml,applicationContext-datasource.xml,firstpro.properties;WEB_INF下的web.xml和dispatcher-servlet.xml

1.web.xml

<?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_2_5.xsd"
         id="WebApp_ID" version="2.5">

    <display-name>Archetype Created Web Application</display-name>

    <!--过滤器的配置-->
    <!--转码过滤器-->
    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!--web容器的启动和关闭监听器-->
    <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>
    <!--把spring容器和web容器整合的监听器-->
    <!--可以通过ContextLoaderListener加载下面的applicationContext.xml配置文件-->
    <listener>
        <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>
    <!--配置springmvc的配置-->
    <!--load-on-startup是优先级,>=0的时候就会被直接加载-->
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
        <!--可以给dispatcher-servlet.xml起个别的名字-->
        <!--<init-param>-->
            <!--<param-name>contextConfigLocation</param-name>-->
            <!--<param-value>WEB-INF/xxx</param-value>-->
        <!--</init-param>-->
    </servlet>
    <!--springmvc的配置是拦截*.do的接口
    也就是说,*.do的请求都会被springmvc拦截-->
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

</web-app>

2.applicationContext.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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--做一个扫描,扫描package中的注解-->
    <context:component-scan base-package="cn.firstpro" annotation-config="true"/>

    <!--<context:annotation-config/>-->
    <!--aop的配置-->
    <aop:aspectj-autoproxy/>

    <!--当前的spring配置文件分离,分离出一个applicationContext-datasource.xml配置文件-->
    <import resource="applicationContext-datasource.xml"/>


</beans>

3.applicationContext-datasource.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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--包扫描加注解-->
    <context:component-scan base-package="cn.firstpro" annotation-config="true"/>
    <!--配置常量分离-->
    <bean id="propertyConfigurer"
          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="order" value="2"/>
        <property name="ignoreUnresolvablePlaceholders" value="true"/>
        <property name="locations">
            <list>
                <value>classpath:datasource.properties</value>
            </list>
        </property>
        <property name="fileEncoding" value="utf-8"/>
    </bean>
    <!--数据库用到的一个dbcp连接池-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${db.driverClassName}"/>
        <property name="url" value="${db.url}"/>
        <property name="username" value="${db.username}"/>
        <property name="password" value="${db.password}"/>
        <!-- 连接池启动时的初始值 -->
        <property name="initialSize" value="${db.initialSize}"/>
        <!-- 连接池的最大值 -->
        <property name="maxActive" value="${db.maxActive}"/>
        <!-- 最大空闲值.当经过一个高峰时间后，连接池可以慢慢将已经用不到的连接慢慢释放一部分，一直减少到maxIdle为止 -->
        <property name="maxIdle" value="${db.maxIdle}"/>
        <!-- 最小空闲值.当空闲的连接数少于阀值时，连接池就会预申请去一些连接，以免洪峰来时来不及申请 -->
        <property name="minIdle" value="${db.minIdle}"/>
        <!-- 最大建立连接等待时间。如果超过此时间将接到异常。设为－1表示无限制 -->
        <property name="maxWait" value="${db.maxWait}"/>
        <!--#给出一条简单的sql语句进行验证 -->
         <!--<property name="validationQuery" value="select getdate()" />-->
        <property name="defaultAutoCommit" value="${db.defaultAutoCommit}"/>
        <!-- 回收被遗弃的（一般是忘了释放的）数据库连接到连接池中 -->
         <!--<property name="removeAbandoned" value="true" />-->
        <!-- 数据库连接过多长时间不用将被视为被遗弃而收回连接池中 -->
         <!--<property name="removeAbandonedTimeout" value="120" />-->
        <!-- #连接的超时时间，默认为半小时。 -->
        <property name="minEvictableIdleTimeMillis" value="${db.minEvictableIdleTimeMillis}"/>

        <!--# 失效检查线程运行时间间隔，要小于MySQL默认-->
        <property name="timeBetweenEvictionRunsMillis" value="40000"/>
        <!--# 检查连接是否有效-->
        <property name="testWhileIdle" value="true"/>
        <!--# 检查连接有效性的SQL语句-->
        <property name="validationQuery" value="SELECT 1 FROM dual"/>
    </bean>

        <!--注入sql工厂,非常重要-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--读取sql实现-->
        <property name="mapperLocations" value="classpath*:mappers/*Mapper.xml"></property>

        <!-- 分页插件 -->
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageHelper">
                    <property name="properties">
                        <value>
                            dialect=mysql
                        </value>
                    </property>
                </bean>
            </array>
        </property>

    </bean>
    <!--扫描dao层-->
    <bean name="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.mmall.dao"/>
    </bean>

    <!-- 使用@Transactional进行声明式事务管理需要声明下面这行 -->
    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />
    <!-- 事务管理 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
        <property name="rollbackOnCommitFailure" value="true"/>
    </bean>
</beans>

4.dispatcher-servlet.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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
       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">

    <!--包扫描-->
    <context:component-scan base-package="cn.firstpro" annotation-config="true"/>
    <!--编码配置-->
    <mvc:annotation-driven>
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/plain;charset=UTF-8</value>
                        <value>text/html;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
            <!--反序列化相关配置-->
            <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
                <!--如果返回的key是空,就可以不在我们的响应当中-->
                <!--<property name="objectMapper">-->
                    <!--<bean class="org.codehaus.jackson.map.ObjectMapper">-->
                        <!--<property name="serializationInclusion" value="NON_EMPTY"/>-->
                    <!--</bean>-->
                <!--</property>-->
                
                <!--支持的类型-->
                <property name="supportedMediaTypes">
                    <list>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>



    <!-- 文件上传 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="10485760"/> <!-- 10m -->
        <property name="maxInMemorySize" value="4096" />
        <property name="defaultEncoding" value="UTF-8"></property>
    </bean>


</beans>

5.datasource.properties

db.driverLocation=F:\\developer\\mysql-connector-java-5.1.6.jar
db.driverClassName=com.mysql.jdbc.Driver
db.url=jdbc:mysql://localhost:3306/firstpro?characterEncoding=utf-8
db.username=root
db.password=root

db.initialSize = 20
db.maxActive = 50
db.maxIdle = 20
db.minIdle = 10
db.maxWait = 10
db.defaultAutoCommit = true
db.minEvictableIdleTimeMillis = 3600000