applicationContext.xml文件详解

<!-- 头文件，主要注意一下编码--><?xml version="1.0" encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans><!-- 建立数据源--><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">   <!-- 数据库驱动，我这里使用的是Mysql数据库-->   <property name="driverClassName">    <value>com.mysql.jdbc.Driver</value>   </property>   <!-- 数据库地址，这里也要注意一下编码，不然乱码可是很郁闷的哦！-->   <property name="url">    <value>       jdbc:mysql://localhost:3306/tie?useUnicode=true&characterEncoding=utf-8   </value>   </property>   <!-- 数据库的用户名-->   <property name="username">    <value>root</value>   </property>   <!-- 数据库的密码-->   <property name="password">    <value>123</value>   </property></bean><!-- 把数据源注入给Session工厂--><bean id="sessionFactory"   class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">   <property name="dataSource">    <ref bean="dataSource" />   </property>   <!-- 配置映射文件-->   <property name="mappingResources">    <list>     <value>com/alonely/vo/User.hbm.xml</value>    </list>   </property></bean><!-- 把Session工厂注入给hibernateTemplate --><!-- 解释一下hibernateTemplate：hibernateTemplate提供了很多方便的方法，在执行时自动建立HibernateCallback 对象，例如：load()、get()、save、delete()等方法。--><bean id="hibernateTemplate"   class="org.springframework.orm.hibernate3.HibernateTemplate">   <constructor-arg>    <ref local="sessionFactory" />   </constructor-arg></bean><!-- 把DAO注入给Session工厂--><bean id="userDAO" class="com.alonely.dao.UserDAO">   <property name="sessionFactory">    <ref bean="sessionFactory" />   </property></bean><!-- 把Service注入给DAO --><bean id="userService" class="com.alonely.service.UserService">   <property name="userDAO">    <ref local="userDAO" />   </property></bean>使用<bean>来为每一个bean进行设定，“id”属性是用以设定Bean的实例别名，稍后可以使用id来取得Bean的实例，"class"属性用来指定Bean的类名称，<property>标签的userDAO设定了setter的名称(setUserDAO),并ref属性隐射到到已经设定的bean的id。还可以有value属性。另外：<bean id="user" class="com.alonely.struts.action.UserAction">   <constructor-arg   index=“0”>      <value>汤青</value></constructor>   <constructor-arg   index=“1”>      <value>女</value></constructor></bean>必须是UserAction中有构造函数，和两个成员变量，index隐射，建议还要有无参数构造函数。这就是Constructor Injection 注入类型。<!-- 把Action注入给Service --><bean name="/user" class="com.alonely.struts.action.UserAction">   <property name="userService">    <ref bean="userService" />   </property></bean></beans>下面是Struts+Spring+Hibernate的中applicationContext.xml配置文件分析<?xml version="1.0" encoding="UTF-8"?><beansxmlns="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"   xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.0.xsd    http://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-2.0.xsd    http://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-2.0.xsd"><!--此配置文件整合了Spring和hibernate的配置文件！采用BasicDataSource注入到hibernate sessionFactory中，以得到数据库连接--><!-- dbcp相关参数配置见http://marzian.blog.163.com/blog/static/266863120086845013920--><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">   <property name="driverClassName">    <value>oracle.jdbc.driver.OracleDriver</value>   </property>   <property name="url">    <value>jdbc:oracle:thin:@10.18.100.52:1521:dxcp1</value>   </property>   <property name="username">    <value>newgspls</value>   </property>   <property name="password">    <value>newgspls</value>   </property>   <property name="initialSize">    <value>1</value>   </property>   <property name="maxActive">    <value>60</value>   </property>   <property name="minIdle">    <value>1</value>   </property>   <property name="maxWait">    <value>6000</value>   </property>   <property name="validationQuery">    <value>select user from dual</value>   </property>    </bean>      <!--从连接池中抽取出本地数据库JDBC对象 几种JDBC对象抽取器，可根据不同的应用服务器进行调整   WebLogic：WebLogicNativeJdbcExtractor        WebSphere：WebSphereNativeJdbcExtractor        JBoss：JBossNativeJdbcExtractor-->    <bean id="nativeJdbcExtractor" class="org.springframework.jdbc.support.nativejdbc.CommonsDbcpNativeJdbcExtractor" lazy-init="true"></bean>        <!-- s可以使用Spring的JDBC帮助类jdbcTemplate-->    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">        <property name="dataSource"><ref bean="dataSource"/></property>    </bean>    <!--Spring 提供了两种LobHandler 用于处理Blob数据    DefaultLobHandler：适用于大部分的数据库，如SqlServer，MySQL，对Oracle 10g也适用，但不适用于Oracle9ioracleLobHandler：适用于Oracle 9i和Oracle 10g。    -->    <bean id="lobHandler" class="org.springframework.jdbc.support.lob.OracleLobHandler" lazy-init="true">     <property name="nativeJdbcExtractor">        <ref local="nativeJdbcExtractor" />     </property> </bean><!--Hibernate Session工厂配置--><bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">   <property name="dataSource">            <ref local="dataSource"/>        </property>        <property name="lobHandler" ref="lobHandler"/>        <property name="mappingResources">            <list>            <!-- hibernate实体映射文件！即生成的*.hbm.xml-->                          <value>com/dao/hibernate/xml/MaintenanceWork.hbm.xml</value>              <value>com/dao/hibernate/xml/SignIn.hbm.xml</value>                     </list>        </property>        <!-- sessionFactory相关配置-->        <property name="hibernateProperties">        <props>           <prop key="hibernate.dialect">org.hibernate.dialect.Oracle9Dialect</prop>           <prop key="hibernate.show_sql">true</prop>           <!--采用Hibernate2.0的HSql解释器，解决了中文问题-->           <prop key="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory</prop>           <!--打开Query Cache开关,需要Cache的query需要单独配置-->           <prop key="hibernate.cache.use_query_cache">true</prop>     <prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>        </props>        </property></bean><!--事务管理器配置--><bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">   <property name="sessionFactory">    <ref local="sessionFactory"/>   </property></bean><!--AOP 事务配置--><tx:advice id="txAdvice" transaction-manager="transactionManager">      <!-- the transactional semantics... -->       <tx:attributes>           <!-- all methods starting with 'get' are read-only -->           <tx:method name="get*" read-only="true"/>           <tx:method name="add*" read-only="false"/>           <tx:method name="insert*" read-only="false"/>           <tx:method name="update*" read-only="false"/>           <tx:method name="del*" read-only="false"/>           <tx:method name="audit*" read-only="false"/>           <!-- other methods use the default transaction settings (see below) -->           <tx:method name="*"/>        </tx:attributes>    </tx:advice>    <aop:config>        <aop:pointcut id="SysFileOperation" expression="execution(* com.biz.system.SysFilesBiz.*(..))"/>        <aop:advisor advice-ref="txAdvice" pointcut-ref="SysFileOperation"/>    </aop:config>        <!-- jdbc Dao 配置begion --><bean id="jdbcDao" class="com.gsww.newgspls.dao.JdbcDao">   <property name="ds">    <ref local="dataSource"/>   </property> </bean><!-- 信息发布配置开始-->   <bean id="sysInfoBiz" class="com.biz.info.SysInfoBiz">    <property name="sysInfoDao">    <ref local="sysInfoDao" />    </property>    </bean>   <bean id="sysInfoDao" class="com.dao.info.SysInfoDao">   <property name="sessionFactory">    <ref local="sessionFactory"/>   </property> </bean> </beans>业务类SysInfoBiz在applicationContext.xml配置注入关系后，在业务类中通过set注入即可得到SysInfoDaopackage com.biz.info;/*** @author 作者：周伟** @version创建时间：2008-7-1 下午04:11:04** 类说明*/import java.util.List;import com.dao.info.SysInfoDao;import com.domain.info.SysInfo;public class SysInfoBiz {private SysInfoDao sysInfoDao = null;    /*** 判断用户是否包含在已读人列表,即通过clob字段里的用户ID查看登陆用户是否已经读过* * @param supportTable* @param reader* @return*/public boolean isRead(SysInfo sysInfo, String reader) {   if (sysInfo.getInfoReader() != null) {    String str = sysInfo.getInfoReader();    if (str.indexOf(",") < 0) {     return (str.contains(reader));    } else {     String pstr = reader + ",";     String astr = "," + reader;     String str1 = "," + reader + ",";     return (str.startsWith(pstr) || str.endsWith(astr) || str       .contains(str1));    }   } else {    return false;   }}/*** 返回信息读者个数* * @param supportTable* @return*/public int readTime(SysInfo sysInfo) {   if (sysInfo.getInfoReader() != null) {    String str = sysInfo.getInfoReader();    String[] str1 = str.split(",");    return str1.length;   } else {    return 0;   }}/*** 对未在已读人列表的读者进行添加到SupReader* * @param supportTable* @param reader* @return*/public boolean addReader(SysInfo sysInfo, String reader) {   if (reader != null && !reader.equals("null")     && !isRead(sysInfo, reader)) {    if (sysInfo.getInfoReader() != null      && !sysInfo.getInfoReader().equals("null")      && !sysInfo.getInfoReader().equals("")) {     sysInfo.setInfoReader(sysInfo.getInfoReader() + "," + reader);    } else {     sysInfo.setInfoReader(reader);    }    try {     sysInfoDao.update(sysInfo);    } catch (Exception re) {     re.printStackTrace();    }    return true;   } else {    return false;   }}/***删除*/public void delete(SysInfo persistentInstance) {   sysInfoDao.delete(persistentInstance);}public List findAll() {   return sysInfoDao.findAll();}public List findByExample(SysInfo instance) {   return sysInfoDao.findByExample(instance);}/***通过id得到实体*/public SysInfo findById(String id) {   return sysInfoDao.findById(id);}/***保存实体*/public void save(SysInfo transientInstance) {   transientInstance.setFlag("1");   sysInfoDao.save(transientInstance);}/***更新实体*/public void update(SysInfo transientInstance) {   transientInstance.setFlag("1");   sysInfoDao.update(transientInstance);}public SysInfoDao getSysInfoDao() {   return sysInfoDao;}public void setSysInfoDao(SysInfoDao sysInfoDao) {   this.sysInfoDao = sysInfoDao;}public PageDAO getPageDao() {   return pageDao;}public void setPageDao(PageDAO pageDao) {   this.pageDao = pageDao;}}SysInfoDao 连接数据库类package com.dao.info;/*** @author 作者：周伟** @version创建时间：2008-7-1 下午04:11:04** 类说明 信息发布公用表dao类*/import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import com.gsww.newgspls.domain.info.SysInfo;public class SysInfoDao extends HibernateDaoSupport {/*** 保存SysInfo实体* * @param transientInstance SysInfo对象*/public void save(SysInfo transientInstance) {   try {    getHibernateTemplate().save(transientInstance);   } catch (RuntimeException re) {    throw re;   }}/***更新SysInfo实体* * @param transientInstance SysInfo对象*/public void update(SysInfo transientInstance) {   try {    getHibernateTemplate().update(transientInstance);   } catch (RuntimeException re) {    throw re;   }}/***删除SysInfo实体* * @param transientInstance SysInfo对象*/public void delete(SysInfo persistentInstance) {   try {    getHibernateTemplate().delete(persistentInstance);   } catch (RuntimeException re) {    throw re;   }}/***通过ID得到SysInfo对象* * @param id信息主键* @return*/public SysInfo findById(java.lang.String id) {   try {    SysInfo instance = (SysInfo) getHibernateTemplate().get(      "com.domain.info.SysInfo", id);    return instance;   } catch (RuntimeException re) {    throw re;   }}}