applicationContext.xml 文件
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<? xml version = "1.0" encoding = "UTF-8" ?> < beans xmlns = "http://www.springframework.org/schema/beans" xmlns:context = "http://www.springframework.org/schema/context" 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:p = "http://www.springframework.org/schema/p" xmlns:util = "http://www.springframework.org/schema/util" xmlns:jdbc = "http://www.springframework.org/schema/jdbc" xmlns:cache = "http://www.springframework.org/schema/cache" 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/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"> <!-- 自动扫描web包 ,将带有注解的类 纳入spring容器管理 --> < context:component-scan base-package = "com.eduoinfo.finances.bank.web" ></ context:component-scan > <!-- 引入jdbc配置文件 --> < bean id = "propertyConfigurer" class = "org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" > < property name = "locations" > < list > < value >classpath*:jdbc.properties</ value > </ list > </ property > </ bean > <!-- dataSource 配置 --> < bean id = "dataSource" class = "com.alibaba.druid.pool.DruidDataSource" init-method = "init" destroy-method = "close" > <!-- 基本属性 url、user、password --> < property name = "url" value = "${jdbc.url}" /> < property name = "username" value = "${jdbc.username}" /> < property name = "password" value = "${jdbc.password}" /> <!-- 配置初始化大小、最小、最大 --> < property name = "initialSize" value = "1" /> < property name = "minIdle" value = "1" /> < property name = "maxActive" value = "20" /> <!-- 配置获取连接等待超时的时间 --> < property name = "maxWait" value = "60000" /> <!-- 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 = "60000" /> <!-- 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 = "300000" /> < property name = "validationQuery" value = "SELECT 'x'" /> < property name = "testWhileIdle" value = "true" /> < property name = "testOnBorrow" value = "false" /> < property name = "testOnReturn" value = "false" /> <!-- 打开PSCache,并且指定每个连接上PSCache的大小 --> < property name = "poolPreparedStatements" value = "false" /> < property name = "maxPoolPreparedStatementPerConnectionSize" value = "20" /> <!-- 配置监控统计拦截的filters --> < property name = "filters" value = "stat" /> </ bean > <!-- mybatis文件配置,扫描所有mapper文件 --> < bean id = "sqlSessionFactory" class = "org.mybatis.spring.SqlSessionFactoryBean" p:dataSource-ref = "dataSource" p:configLocation = "classpath:mybatis-config.xml" p:mapperLocations = "classpath:com/eduoinfo/finances/bank/web/dao/*.xml" /> <!-- spring与mybatis整合配置,扫描所有dao --> < bean class = "org.mybatis.spring.mapper.MapperScannerConfigurer" p:basePackage = "com.eduoinfo.finances.bank.web.dao" p:sqlSessionFactoryBeanName = "sqlSessionFactory" /> <!-- 对dataSource 数据源进行事务管理 --> < bean id = "transactionManager" class = "org.springframework.jdbc.datasource.DataSourceTransactionManager" p:dataSource-ref = "dataSource" /> <!-- 配置使Spring采用CGLIB代理 --> < aop:aspectj-autoproxy proxy-target-class = "true" /> <!-- 启用对事务注解的支持 --> < tx:annotation-driven transaction-manager = "transactionManager" /> <!-- Cache配置 --> < cache:annotation-driven cache-manager = "cacheManager" /> < bean id = "ehCacheManagerFactory" class = "org.springframework.cache.ehcache.EhCacheManagerFactoryBean" p:configLocation = "classpath:ehcache.xml" /> < bean id = "cacheManager" class = "org.springframework.cache.ehcache.EhCacheCacheManager" p:cacheManager-ref = "ehCacheManagerFactory" /> </ beans > |
1、<context:component-scan base-package="com.eduoinfo.finances.bank.web"></context:component-scan> 作用Spring 容器初始化的时候,会扫描 com.eduoinfo.finances.bank.web下 标有 (@Component,@Service,@Controller,@Repository) 注解的 类 纳入spring容器管理
在类上 ,使用以下注解,实现bean 的声明
@Component 泛指组件,当组件不好归类的时候,我们可以使用这个注解进行标注。
@Service 用于标注业务层组件
@Controller 用于标注控制层组件(如srping mvc的controller,struts中的action)
@Repository 用于标注数据访问组件,即DAO组件
示例:
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@Controller @RequestMapping (value = "/test" ) public class TestController { } |
在类的成员变量上,使用以下注解,实现属性的自动装配
@Autowired : 按类 的 类型进行装配
@Resource (推荐) :
1 如果同时指定了name和type,则从spring上下文中找到唯一匹配的bean进行装配,找不到则抛出异常
2. 如果指定了name,则从上下文中查找名称(id)匹配的bean进行装配,找不到则抛出异常
3.如果指定了type,则从上下文中找到类型匹配的唯一bean进行装配,找不到或者找到多个,都会抛出异常
4.如果既没有指定name,又没有指定type,则自动按照byName方式进行装配;如果没有匹配,则回退为一个原始类型进行匹配,如果匹配则自动装配;
@Resource注解在字段上,这样就不用写setter方法了,并且这个注解是属于J2EE的,减少了与spring的耦合。
示例:
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@Resource private TestServiceImpl testServiceImpl; |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://blog.csdn.net/zoutongyuan/article/details/27073683