一,需要的jar包
除了springmvc和mybatis的一些jar包以外,其他的需要的jar包如下
1.ehcache-2.8.3.jar
网上很多资料列出来的是ehcache-core-2.4.4.jar,这个包,经过实测这个包无效,需要使用上面列出来的包
2.mybatis-ehcache-1.0.0.jar
二,目录结构如下
三,主要的配置文件
先加入ehache.xml文件后,主要的一步是在spring-mybatis.xml中加入
<!-- 使用ehcache缓存 -->
<bean id="ehCacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean" p:shared="true">
<property name="configLocation" value="classpath:ehcache.xml" />
</bean>以下是主要的配置文件
1,ehache.xml
<?xml version="1.0" encoding="UTF-8"?> <ehcache dynamicConfig="false" monitoring="off" updateCheck="false" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="ehcache.xsd"> <diskStore path="java.io.tmpdir"/> <!-- 定义缓存策略 eternal="false" // 元素是否永恒,如果是就永不过期(必须设置) maxEntriesLocalHeap="1000" // 堆内存中最大缓存对象数,0没有限制(必须设置) overflowToDisk="false" // 当缓存达到maxElementsInMemory值是,是否允许溢出到磁盘(必须设置) diskPersistent="false" // 磁盘缓存在VM重新启动时是否保持(默认为false) timeToIdleSeconds="0" // 导致元素过期的访问间隔(秒为单位). 当eternal为false时,这个属性才有效,0表示可以永远空闲,默认为0 timeToLiveSeconds="600" // 元素在缓存里存在的时间(秒为单位). 0 表示永远存在不过期 memoryStoreEvictionPolicy="LFU" // 当达到maxElementsInMemory时,如何强制进行驱逐默认使用"最近使用(LRU)"策略,其它还有先入先出FIFO,最少使用LFU,较少使用LRU --> <defaultCache eternal="false" maxEntriesLocalHeap="0" timeToIdleSeconds="300" timeToLiveSeconds="300"/> <cache name="myCache" maxElementsInMemory="10000" eternal="true" overflowToDisk="false" timeToIdleSeconds="0" timeToLiveSeconds="600" memoryStoreEvictionPolicy="LFU" /> </ehcache>
2,spring-mvc.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!-- 开启注解--> <mvc:annotation-driven /> <!-- 自动扫描该包,使SpringMVC认为包下用了@controller注解的类是控制器 --> <context:component-scan base-package="com.myd.controller" use-default-filters="false"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- 启动SpringMVC的注解功能,完成请求和注解POJO的映射 --> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"> <property name="messageConverters"> <list> <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>application/json;charset=UTF-8</value> <value>text/plain;charset=UTF-8</value> <value>text/html;charset=UTF-8</value> </list> </property> </bean> <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter" /> </list> </property> </bean> <!-- 定义跳转的文件的前后缀 ,视图模式配置--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀,变成一个 可用的url地址 --> <property name="prefix" value="" /> <property name="suffix" value="" /> </bean> <!-- 配置文件上传,如果没有使用文件上传可以不用配置,当然如果不配,那么配置文件中也不必引入上传组件包 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 默认编码 --> <property name="defaultEncoding" value="utf-8" /> <!-- 文件大小最大值 --> <property name="maxUploadSize" value="10485760000" /> <!-- 内存中的最大值 --> <property name="maxInMemorySize" value="40960" /> </bean> <bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <property name="exceptionMappings"> <props> <prop key="java.lang.Exception">error</prop> <prop key="java.lang.Throwable">error</prop> </props> </property> <property name="statusCodes"> <props> <prop key="error">500</prop> <prop key="error">404</prop> </props> </property> <!-- 设置日志输出级别,不定义则默认不输出警告等错误日志信息 --> <property name="warnLogCategory" value="WARN"></property> <!-- 默认错误页面,当找不到上面mappings中指定的异常对应视图时,使用本默认配置 --> <property name="defaultErrorView" value="error"></property> <!-- 默认HTTP状态码 --> <property name="defaultStatusCode" value="500"></property> </bean> </beans>
3,spring-mybatis.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:cache="http://www.springframework.org/schema/cache" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd"> <!-- 自动扫描 --> <context:component-scan base-package="com.myd" /> <!-- 引入配置文件 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:jdbc.properties" /> </bean> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${driver}" /> <property name="url" value="${url}" /> <property name="username" value="${username}" /> <property name="password" value="${password}" /> <!-- 初始化连接大小 --> <property name="initialSize" value="${initialSize}"></property> <!-- 连接池最大数量 --> <property name="maxActive" value="${maxActive}"></property> <!-- 连接池最大空闲 --> <property name="maxIdle" value="${maxIdle}"></property> <!-- 连接池最小空闲 --> <property name="minIdle" value="${minIdle}"></property> <!-- 获取连接最大等待时间 --> <property name="maxWait" value="${maxWait}"></property> </bean> <!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 自动扫描mapping.xml文件 --> <property name="mapperLocations" value="classpath:com/myd/mapping/*.xml"></property> </bean> <!-- DAO接口所在包名,Spring会自动查找其下的类 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.myd.mapper" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean> <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 使用ehcache缓存 --> <bean id="ehCacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean" p:shared="true"> <property name="configLocation" value="classpath:ehcache.xml" /> </bean> </beans>
4.jdbc.properties
driver=com.mysql.jdbc.Driver url=jdbc:mysql:///mybatis?useUnicode=true&characterEncoding=UTF-8 username=root password=mayude #定义初始连接数 initialSize=0 #定义最大连接数 maxActive=20 #定义最大空闲 maxIdle=20 #定义最小空闲 minIdle=1 #定义最长等待时间 maxWait=60000
5.log4j.properties
log4j.rootLogger = debug,stdout,D,E log4j.appender.stdout = org.apache.log4j.ConsoleAppender log4j.appender.stdout.Target = System.out log4j.appender.stdout.layout = org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern = %d %p [%c] - %m%n log4j.logger.com.ibatis=debug log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug log4j.logger.java.sql.Connection=debug log4j.logger.java.sql.Statement=debug log4j.logger.java.sql.PreparedStatement=debug,stdout
四,使用缓存
通过上述的配置已经配置好缓存了,可是如何使用呢,使用缓存时需要在mybatis的xml配置文件中加入如下的配置
例如UserMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!-- 为这个mapper指定一个唯一的namespace,namespace的值习惯上设置成包名+sql映射文件名,这样就能够保证namespace的值是唯一的
例如namespace="me.gacl.mapping.userMapper"就是me.gacl.mapping(包名)+userMapper(userMapper.xml文件去除后缀)
-->
<mapper namespace="com.myd.mapper.UserMapper">
<!-- 使用缓存 -->
<!--
<cache type="org.mybatis.caches.ehcache.LoggingEhcache"/>
-->
<cache type="org.mybatis.caches.ehcache.LoggingEhcache" >
<property name="timeToIdleSeconds" value="3600"/>
<property name="timeToLiveSeconds" value="3600"/>
<property name="maxEntriesLocalHeap" value="1000"/>
<property name="maxEntriesLocalDisk" value="10000000"/>
<property name="memoryStoreEvictionPolicy" value="LRU"/>
</cache>
<!-- 在select标签中编写查询的SQL语句, 设置select标签的id属性为getUser,id属性值必须是唯一的,不能够重复
使用parameterType属性指明查询时使用的参数类型,resultType属性指明查询返回的结果集类型
resultType="me.gacl.domain.User"就表示将查询结果封装成一个User类的对象返回
User类就是users表所对应的实体类
-->
<!-- 查询所有的user对象 -->
<select id="getall" parameterType="com.myd.entity.User" resultType="com.myd.entity.User">
select * from user where 1=1
<if test="user_name!=null and user_name !=''">
and user_name=#{user_name}
</if>
<if test="user_number!=null and user_number !=''">
and user_number=#{user_number}
</if>
</select>
<!-- 根据分页查询数据 -->
<select id="findpage" resultType="com.myd.entity.User" parameterType="java.util.HashMap">
select * from user where 1=1
<if test="user.user_name!=null and user.user_name !=''">
and user_name=#{user.user_name}
</if>
<if test="user.user_number!=null and user.user_number !=''">
and user_number=#{user.user_number}
</if>
limit #{pageable.start},#{pageable.limit}
</select>
<!-- 添加数据 -->
<insert id="save" useGeneratedKeys="true" keyProperty="user_pk" parameterType="com.myd.entity.User">
<!-- 设置uuid为主键,只针对mysq数据库 -->
<selectKey keyProperty="user_pk" resultType="String" order="BEFORE">
select uuid()
</selectKey>
insert into user (user_pk, user_number, user_name, user_password,fk_roles_pk,user_sex,user_birthday,fk_station_pk,user_intime,user_phone,user_email)
values
(
#{user_pk}, #{user_number}, #{user_name}, #{user_password},#{fk_roles_pk},#{user_sex},#{user_birthday},#{fk_station_pk},#{user_intime},#{user_phone},#{user_email}
)
</insert>
<!-- 删除数据 -->
<delete id="delete" >
delete from user where user_pk IN
<foreach collection="list" item="id" open="(" separator="," close=")">
#{id}
</foreach>
</delete>
</mapper>
五,测试缓存是否生效
可以自己写一个测试类,来看是否生效,我这儿主要是已经和extjs做了整合,所以测试的时候直接刷新页面查看效果
第一次加载页面的时候发现是从数据库中查询的数据,查看控制台的输出日志发现如下,会输出sql语句,命中率为0
对比两次的输出结果,就可以看到缓存起作用了
2015-09-29 16:34:19,523 DEBUG [org.mybatis.spring.SqlSessionUtils] - Creating a new SqlSession
2015-09-29 16:34:19,538 DEBUG [org.mybatis.spring.SqlSessionUtils] - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@55249084] was not registered for synchronization because synchronization is not active
2015-09-29 16:34:19,570 DEBUG [com.myd.mapper.UserMapper] - Cache Hit Ratio [com.myd.mapper.UserMapper]: 0.0
2015-09-29 16:34:19,585 DEBUG [org.springframework.jdbc.datasource.DataSourceUtils] - Fetching JDBC Connection from DataSource
2015-09-29 16:34:20,147 DEBUG [org.mybatis.spring.transaction.SpringManagedTransaction] - JDBC Connection [jdbc:mysql:///mybatis?useUnicode=true&characterEncoding=UTF-8, UserName=root@localhost, MySQL Connector Java] will not be managed by Spring
2015-09-29 16:34:20,162 DEBUG [com.myd.mapper.UserMapper.getall] - ==> Preparing: select * from user where 1=1
2015-09-29 16:34:20,194 DEBUG [com.myd.mapper.UserMapper.getall] - ==> Parameters:
2015-09-29 16:34:20,272 DEBUG [com.myd.mapper.UserMapper.getall] - <== Total: 29当第二次刷新页面的时候,就会发现取得是之前缓存的数据,同时会显示缓存命中率
2015-09-29 16:36:57,778 DEBUG [org.mybatis.spring.SqlSessionUtils] - Creating a new SqlSession
2015-09-29 16:36:57,778 DEBUG [org.mybatis.spring.SqlSessionUtils] - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@67f1379] was not registered for synchronization because synchronization is not active
2015-09-29 16:36:57,779 DEBUG [com.myd.mapper.UserMapper] - Cache Hit Ratio [com.myd.mapper.UserMapper]: 0.3333333333333333
2015-09-29 16:36:57,779 DEBUG [org.mybatis.spring.SqlSessionUtils] - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@67f1379]
2015-09-29 16:36:57,780 DEBUG [org.mybatis.spring.SqlSessionUtils] - Creating a new SqlSession
2015-09-29 16:36:57,780 DEBUG [org.mybatis.spring.SqlSessionUtils] - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@38f40746] was not registered for synchronization because synchronization is not active
2015-09-29 16:36:57,781 DEBUG [com.myd.mapper.UserMapper] - Cache Hit Ratio [com.myd.mapper.UserMapper]: 0.5
2015-09-29 16:36:57,781 DEBUG [org.mybatis.spring.SqlSessionUtils] - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@38f40746]
2015-09-29 16:36:57,783 DEBUG [org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor] - Written [com.myd.utils.Page@598602dc] as "application/json;charset=UTF-8" using [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter@16358f38]
2015-09-29 16:36:57,787 DEBUG [org.springframework.web.servlet.DispatcherServlet] - Null ModelAndView returned to DispatcherServlet with name 'SpringMVC': assuming HandlerAdapter completed request handling
2015-09-29 16:36:57,788 DEBUG [org.springframework.web.servlet.DispatcherServlet] - Successfully completed request
六,说明
各个接口还有action就不详细说了,都在源代码里面,或者查看另外一篇博客,里面有详细的说明,只是在之前代码的基础上增加了ehcache缓存功能
另外一篇的地址是http://my.oschina.net/mayude/blog/504304
另外用extjs5实现了一个简单的后台管理框架,其中的员工管理实现了列表获取还有分页等简单的功能
七,代码下载地址