Spring学习笔记（三）

C、集合的装配

public   class   SomeBean  {

private  List  listProperty ;

private  Set  setProperty ;

private  Map  mapProperty ;

private  Properties  property ;

public  List getListProperty() {

return   listProperty ;

}

public   void  setListProperty(List listProperty) {

this . listProperty  = listProperty;

}

public  Set getSetProperty() {

return   setProperty ;

}

public   void  setSetProperty(Set setProperty) {

this . setProperty  = setProperty;

}

public  Map getMapProperty() {

return   mapProperty ;

}

public   void  setMapProperty(Map mapProperty) {

this . mapProperty  = mapProperty;

}

public  Properties getProperty() {

return   property ;

}

public   void  setProperty(Properties property) {

this . property  = property;

}

public   void  printInfo(){

System. out .println( "listProperty" );

System. out .println( listProperty );

System. out .println( "setProperty" );

System. out .println( setProperty );

Set set =  mapProperty .entrySet();

Iterator it = set.iterator();

while (it.hasNext()){

 Map.Entry entry = (Entry) it.next();

 System. out .println( "Key "  +entry.getKey() );

 System. out .println( "value " +entry.getValue());

}

System. out .println( "props: " );

Set set2 =  property .entrySet();

Iterator it2 = set2.iterator();

while (it2.hasNext()){

Map.Entry entry= (Entry) it2.next();

System. out .println( "key " +entry.getKey());

System. out .println( "value " +entry.getValue());

}

}

}

applcationContext.xml的写法：

< bean  id = "someBean"  class = "ioc3.SomeBean" >

< property  name = "listProperty" >

  < list >

     < value > list1 </ value >

     < value > list1 </ value >

     < value > list3 </ value >

  </ list >

</ property >

< property  name = "setProperty" >

  < set >

     < value > set1 </ value >

     < value > set1 </ value >

     < value > set3 </ value >

  </ set >

</ property >

     < property  name = "mapProperty" >

  < map >

     < entry  key = "key1" >

           < value > value1 </ value >

     </ entry >

    < entry  key = "key2" >

           < value > value2 </ value >

     </ entry >

  </ map >

</ property >

     < property  name = "property" >

      < props >

   < prop  key = "key1" > prop1 </ prop >

   < prop  key = "key2" > prop2 </ prop >

   < prop  key = "key3" > prop3 </ prop >

   </ props >

</ property >

</ bean >

测试类：Test

public   static   void  main(String[] args) {

//  TODO  Auto-generated method stub

ApplicationContext    ac =

  new  ClassPathXmlApplicationContext( "ioc3\\applicationContext.xml" );

    SomeBean sb = (SomeBean) ac.getBean( "someBean" );

    sb.printInfo();

}

（2） 、基于构造器（在A中注入B类的构造器）

在Bean中不用写set方法，但是要有构造器

例子：

public   class  SomeBean {

//构造器配置

private  String  str1 ;

private  String  str2 ;

private   int   value1 ;

public  SomeBean(String str1, String str2,  int  value1) {

super ();

this . str1  = str1;

this . str2  = str2;

this . value1  = value1;

}

public   void  printInfo(){

   System. out .println( "str1 " + str1  + "str2 " + str2 + " value1 " + value1  );

}

}

配置文件applicationContext.xml的写法

< bean  id = "someBean"  class = "ioc4.SomeBean" >

< constructor-arg >

   < value > String1 </ value >

</ constructor-arg >

< constructor-arg >

   < value > String2 </ value >

</ constructor-arg >

< constructor-arg >

   < value > 100 </ value >

</ constructor-arg >

</bean>