spring learn experience-优快云博客

本文介绍了Spring框架的配置方式及依赖注入的多种实现方法，包括普通实例化、静态工厂实例化和工厂实例化等，并探讨了注解自动扫描、反射与内省的区别以及双重检查锁定模式。

org.springframework.context-3.1.0.M2.jar
org.springframework.beans-3.1.0.M2.jar
dist\org.springframework.core-3.1.0.M2.jar
commons-logging-1.1.1.jar
dist\org.springframework.asm-3.1.0.M2.jar
dist\org.springframework.expression-3.1.0.M2.jar
commons-beanutils-1.8.0.jar
dom4j

Introspector java.beans.Introspector

http://www.kaifa6.com/v/J2SEApi/javaref/jdkref/java.beans.introspector_dsc.htm#getBeanInfo(java.lang.Class, java.lang.Class)

ConvertUtils.convert("1232a", Integer.class); org.apache.commons.beanutils.ConvertUtils

<?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:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
           http://www.springframework.org/schema/context 
           http://www.springframework.org/schema/context/spring-context-3.0.xsd
           ">

<!-- for annotation should quote the three line above and a line below -->
	<context:annotation-config/>

<!-- id can not been named as special character ,but name does -->
<!-- 1. normal instance of bean-->
  <bean id="personService" class="beans.PersonServiceBean">
  	<property name="personDao" ref="personDao"></property>
  	<property name="testName" value="James"/>
  	<property name="sets">
  		<set>
  			<value>a</value>
  			<value>b</value>
  			<value>c</value>
  		</set>
  	</property>
  	<property name="lists">
  		<list>
  			<value>a</value>
  			<value>b</value>
  			<value>c</value>
  			<bean class="interfaces.PersonServiceFactory" />
  			<bean class="beans.PersonDaoBean"/>
  		</list>
  	</property>
  	
  	<property name="maps">  
  		<map>
  			<entry key="3" value="personDao"/>
		    <entry key="1" value-ref="personDao"/>
		    <entry key="2" value-ref="personDao"/>
	   </map>
  		
  	</property>
  	<property name="properties">
  		<props>
  			<prop key="age">11</prop>
  		</props>
  	</property>
  </bean>
  <bean id="personDao" class="beans.PersonDaoBean">
  </bean>
	
<!-- 2. static factory instance of bean-->
  <bean id="personService2" class="interfaces.PersonServiceFactory" factory-method="createFactory"/>
  
<!-- 3. factory instance of bean-->
  <bean id="personServiceFactory" class="interfaces.PersonServiceFactory"/>
  <bean id="personService3" factory-bean="personServiceFactory" factory-method="createFactory2"/>
<!--   <bean id="personService3" factory-bean="personServiceFactory" factory-method="createFactory2" scope="prototype"/> -->
</beans>

<?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:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
           http://www.springframework.org/schema/context 
           http://www.springframework.org/schema/context/spring-context-3.0.xsd
           ">
<!-- FOR AUTO INJECT IN CLASS FILES -->
	  <context:component-scan base-package="beans"/>
</beans>