spring --wiring binding

spring --wiring binding

Containing your beans
    Tere i sno single Spring container.Spring actually comes with two distince types of containers:Bean factories and Application

contexts.Beyong there two basic types of contains .Srping come with sereral implementss of BeanFacotory and ApplicationContext.
  1 introducing the BeanFactory
  There are several implementations of BeanFactory in Spring .But the most userful one is XmlBeanFactory,whick loads
its bean based on the definitions contained in an xml file.
  Creat a XmlBeanFactory  BeanFactory factory=new XMLBeanFactory(new FileInputStream("beans.xml"));
 But at that time ,the BeanFactory does not initialize the bean ,it is loaded lazliy.
  Get the Bean :MyBean myBean=(MyBean)factory.getBean("myBean");
 When getBean() is called ,the factory will instantiate the bean and being setting the bean using dependency injection.
  2 Working with an application context
 an ApplicationContextis prefered over a BeanFactory in nearly all application ,the only time you might consider using a BeanFactory

are in circumtance where resource s are scarce.
   Amony the many implements of ApplicationContext are three that are commonly used:
      ClassPathXmlApplicationContext,FileSystemXmpApplicationContext,XmlWebApplicationContext.
   ApplicationContext context=new ClassPathXmlApplicationContext("foo.xml");
 wiring the beans
  <beans>
    <bean id="foo" class="com.springinaction.Foo" />
 </beans>
 Prototyping vs.singleton
 By default ,all Spring beans are singletons.When the container dispenses a bean it will always give the exact same instance of the    

In this case ,you would want to define a prototype bean .Defining a prototype means that instead of defining a single bean.
     <bean id="foo" class="com.springinaction.Foo"  single/>on="false" />
Initialization and destruction
   <bean id="foo" class="com.springinaction.Foo" init-method="setup" destory-method="teardown">
Injectiong dependencies via setter method
   <bean id="foo" class="com.srpinginaction.Foo" >
        <property name="name">Foo McFoo</value>
   </bean>
 Referencing other beans
   <bean id="foo" class="com.springinaction.Foo">
     <property name="bar" >
        <ref bean="bar" />
     </property>
    </bean>
    <bean id="bar" colass="com.srpinginaction.Bar" />
 Inner beans
   <bean id="courseService"
             class="com.CourseWericeImpl">
     <property nanme="studentService">
         <bean
              class="com....." />
      </property>
   </bean>
  Wiring collections
    1Wiring lists and arrays  java.util.List
      <property name="barList">
           <list>
                <value>bar1</value>
                <ref bean="bar2"/>
           </lsit>
      </property>
   2 Wiring set  java.tuil.Set
    <property name="barSet">
          <set>
                 <value>bar1</value>
                 <ref bean="bar2" />
          </set>
   </property>
   3 Wiring maps java.util.Map
   <property name="barMap">
        <ebtry key="key1">
        <value>bar1</value>
   </property>
  4 Wiring propertyies
    <property name="barProps">
         <props>
            <prop key="key1">bar1</prop>
            <prop key="key2">bar2</prop>
         </props>
    </property>
  5 Setting null values
   <property name="foo"><null/><property>
   injecting dependencies via constructor
   <id="foo" class="com.springinaction.Foo">
    <constructor-arg>
        <value>42<value>( <ref bean="bar">)
     </constructor-arg>
    <bean id="foo" class="com.springinaction.Foo">
       <constructor-arg>
            <value>http://www.manning.com</value>
       </constructor-arg>
  <constructor-arg>
            <value>http://www.manning.com</value>
       </constructor-arg>
   </bean>