【轉】spring application.xml在項目中的幾種解析方式

【轉】spring application.xml在項目中的幾種解析方式  

解析 在java項目中的spring applicationContext.xml文件的幾種解析方式：
一種：
ApplicationContext cxt = new ClassPathXmlApplicationContext(「applicationContext.xml」);
cxt.getBean(「在applicationContext.xml中bean的id」);

二種：
ApplicationContext cxt =
 new FileSystemXmlApplicationContext(「applicationContext.xml的絕對路徑」);
cxt.getBean(「在applicationContext.xml中bean的id」);

三種：
Resource res= new ClasspathResource(「applicationContext.xml」);
XmlBeanFactory factory = new XmlBeanFactory(res);
factory.getBean(「applicationContext.xml中的bean的id」);

第四種:在web項目中解析applicationContext.xml，此方法本人感受很好用，如在struts2.0+hibernate3.0+sprnig2.0中，某jsp頁面須用daoImpl(業務實現類的一個方法),通常寫法是在action中調用該方法，寫不能夠直接使用，由於全部東東都交給spring管理了，可是在原來的基礎上加上如下這個類，作法就多了，咱們能夠在該jsp頁面用<s:bean id="aa" name="org.xxxx.Gean"> <s:set name="bb" value="%{#aa.getBean('此處爲applicationContext.xml中所寫的daoImpl的bean的id')}"> bb就是咱們所要的方法的返回值.
public class GetBean {
    private XmlBeanFactory factory;
 public GetBean()
 {
    Resource res=new ServletContextResource(ServletActionContext.getServletContext(),"/WEB-INF/transaction.xml");
    factory=new XmlBeanFactory(res);
 }
    public Object getBean(String beanname)
    {
     XmlWebApplicationContext ctx=new XmlWebApplicationContext();
     ServletContext servletcontext=ServletActionContext.getServletContext();
     ctx.setServletContext(servletcontext);
     ctx.setConfigLocations(new String[]{"/WEB-INF/transaction.xml"});
  ctx.refresh();//由servletContext初始化beanfactory須要的配置文件，進而加載該配置文件
  Object obj=ctx.getBean(beanname);
      return obj; 
    }
}

 如下爲applicationContext.xml完整配置文件，供參考

- <bean id="config" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
- <property name="location">
  <value>classpath:jdbc.properties</value> 
  </property>
  </bean>
- <bean id="jdbc" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
- <property name="url">
  <value>${connection.url}</value> 
  </property>
  <property name="driverClassName" value="${connection.driver_class}" /> 
- <property name="username">
  <value>${connection.username}</value> 
  </property>
- <property name="password">
  <value>${connection.password}</value> 
  </property>
  </bean>
- <bean id="sessionfactroy" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  <property name="dataSource" ref="jdbc" /> 
- <property name="hibernateProperties">
- <props>
  <prop key="hibernate.dialect">${dialect}</prop> 
  <prop key="hibernate.show_sql">${hibernate.show_sql}</prop> 
  <prop key="hibernate.generate_statistics">true</prop> 
  <prop key="hibernate.cache.use_query_cache">true</prop> 
  <prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop> 
  </props>
  </property>
- <property name="mappingDirectoryLocations">
  <value>/WEB-INF/classes/org/itfuture/wuliu/hbm</value> 
  </property>
- <property name="eventListeners">
- <map>
- <entry key="merge">
  <bean class="org.springframework.orm.hibernate3.support.IdTransferringMergeEventListener" /> 
  </entry>
  </map>
  </property>
  </bean>
- <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory" ref="sessionfactroy" /> 
  </bean>
- <!-- DAO對象注入  --> 
- <bean id="cgdddaoimpl" class="org.itfuture.wuliu.daoimpl.CgddDaoimpl">
  <property name="sessionFactory" ref="sessionfactroy" /> 
  </bean>
- <bean id="cgshddaoimpl" class="org.itfuture.wuliu.daoimpl.CgshdDaoimpl">
  <property name="sessionFactory" ref="sessionfactroy" /> 
  </bean>
- <bean id="gysdaoimpl" class="org.itfuture.wuliu.daoimpl.GysDaoImpl">
  <property name="sessionFactory" ref="sessionfactroy" /> 
  </bean>
- <!-- 業務層對象注入  --> 
- <bean id="cgddservice" class="org.itfuture.wuliu.serviceimpl.CgddServiceImpl">
  <property name="cgdddao" ref="cgdddaoimpl" /> 
  </bean>
- <bean id="cgshdservice" class="org.itfuture.wuliu.serviceimpl.CgshdServiceImpl">
  <property name="cgshddao" ref="cgshddaoimpl" /> 
  </bean>
- <bean id="gysservice" class="org.itfuture.wuliu.serviceimpl.GysServiceImpl" scope="prototype">
  <property name="gysdao" ref="gysdaoimpl" /> 
  </bean>
- <aop:config>
  <aop:advisor pointcut="execution(* *..CgddDao.*(..))" advice-ref="txAdvice" /> 
  </aop:config>
- <tx:advice id="txAdvice">
- <tx:attributes>
  <tx:method name="save*" /> 
  <tx:method name="update*" /> 
  <tx:method name="delete*" /> 
  <tx:method name="*" read-only="true" /> 
  </tx:attributes>
  </tx:advice>
- <!--Action--> 
  <bean id="baseaction" class="org.itfuture.wuliu.action.BaseAction" /> 
- <bean id="cgddAction" class="org.itfuture.wuliu.action.CgddAction">
  <property name="cgddservice" ref="cgddservice" /> 
  </bean>
- <bean id="cgshdAction" class="org.itfuture.wuliu.action.CgshdAction">
  <property name="cgshdservice" ref="cgshdservice" /> 
  </bean>
- <bean id="gysAction" class="org.itfuture.wuliu.action.GysAction">
  <property name="gysservice" ref="gysservice" /> 
  </bean>
  </beans>

 

轉自：http://blog.csdn.net/KOOK_OKKO/archive/2009/06/30/4310839.aspx