spring property 复杂类型属性注入:MAP/LIST/SET

<? xml version="1.0" encoding="UTF-8" ?>
<! DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd" >
< beans >
   < bean  id ="chinese"  class ="Bean.collections.Chinese" >
     <!-- List 注入例子 -->
     < property  name ="schools" >     
       < list >
          < value > 小学 </ value >
          < value > 中学 </ value >
          < value > 大学 </ value >
       </ list >
     </ property >
     <!-- Properties 注入例子 -->
     < property  name ="health" >
        < props >
          < prop  key ="血压" > 正常 </ prop >
          < prop  key ="身高" > 178 </ prop >
        </ props >
     </ property >
     <!-- Map 注入例子 -->
     < property  name ="scores" >
       < map >
         < entry  key ="数学" >
            < value > 88 </ value >
         </ entry >
         < entry  key ="语文" >
            < value > 99 </ value >
         </ entry >
       </ map >
     </ property >

 

<!--Map 例子-->

 <bean id="accountConfig" class="java.util.HashMap">
  <constructor-arg>
   <map>
    <entry key="accountResourceSQL">
     <value>SELECT * FROM ABC</value>
    </entry>
   </map>
  </constructor-arg>
 </bean>

 

     <! -Set 注入例子-- >
     < property  name ="axes" >
       < set >
         < value > 字符串斧子 </ value >
         <!--  用嵌套bean定义属性  -->
         < bean  class ="Bean.collections.WoodAxe" />
         <!--  引用bean作为属性  -->
         < ref  bean ="steelaxe" />
       </ set >
     </ property >

  <!--array 注入例子-->

  <property name="array">   
   <list>   
    <value>array1</value>   
    <value>array2</value>   
   </list>   
  </property> 
   </ bean >
   < bean  id ="steelaxe"  class ="Bean.collections.SteelAxe" ></ bean >
</ beans >

实例java代码：

package  Bean.collections;
import  java.util.ArrayList;
import  java.util.HashMap;
import  java.util.HashSet;
import  java.util.List;
import  java.util.Map;
import  java.util.Properties;
import  java.util.Set;
import  Bean.collections.Person;
public   class  Chinese  implements  Person {
     private  List schools = new  ArrayList();
     private  Map scores = new  HashMap();
     private  Properties health = new  Properties();
     private  Set axes = new  HashSet();
     public  Set getAxes() {
         return  axes;
    }
     public   void  setAxes(Set axes) {
         this .axes  =  axes;
    }
     public  Properties getHealth() {
         return  health;
    }
     public   void  setHealth(Properties health) {
         this .health  =  health;
    }
     public  List getSchools() {
         return  schools;
    }
     public   void  setSchools(List schools) {
         this .schools  =  schools;
    }
     public  Map getScores() {
         return  scores;
    }
     public   void  setScores(Map scores) {
         this .scores  =  scores;
    }
     public   void  useAxe() {
        System.out.println(schools);
        System.out.println(scores);
        System.out.println(axes);
        System.out.println(health);
    }

}

jdbc.properties配置文件实例：

/WEB-INF/jdbc.properties

jdbc.driver=org.postgresql.Driver   
jdbc.url=jdbc:postgresql://localhost/test   
jdbc.user=postgres   
jdbc.password=  

Bean配置如下：

 

< bean  id ="propertyConfigurer"   class ="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >    
     < property  name ="location" >    
         < value > /WEB-INF/jdbc.properties </ value >    
     </ property >    
</ bean >  

或者使用多个配置文件：

 

< bean  id ="propertyConfigurer"   class ="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >      
     < property  name ="locations" >       
          < list >        
            < value > /WEB-INF/jdbc.properties </ value >       
         </ list >      
     </ property >     
</ bean >  

 

applicationContext.xml中数据源配置:

< bean  id ="dataSource"   class ="org.springframework.jdbc.datasource.DriverManagerDataSource" >    
     < property  name ="driverClassName" >    
         < value > ${jdbc.driver} </ value >    
     </ property >    
     < property  name ="url" >    
         < value > ${jdbc.url} </ value >    
     </ property >    
     < property  name ="username" >    
         < value > ${jdbc.user} </ value >    
     </ property >    
     < property  name ="password" >    
         < value > ${jdbc.password} </ value >    
     </ property >    
</ bean >