spring入门-----spring中遍历各种集合

spring-collection.xml

 xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd">

     <bean id="collectionBean" class="www.csdn.spring.collection.set.CollectionBean" scope="singleton" lazy-init="default">

         <property name="sets">
             <set>
                 <value>岑红军value>
                 <value>军哥value>
                 <value>哈哈value>
                 <value>呵呵value>
                 <value>嘿嘿value>
                 <value>洗洗value>
             set>
         property>

     <property name="users">

     <property name="map">
         <map>
             <entry key="1" value-ref="u1">entry>
             <entry key="2">
                 <ref bean="u2"/>
             entry>
             <entry key="3" value-ref="u3">
             entry>

         map>
     property>

     <property name="props">
         <props>
             <prop key="1">jdbc:oracleprop>
             <prop key="2">jdbc:mysqlprop>
             <prop key="3">jdbc:accessprop>
         props>
     property>
     bean>
     <bean id="u1" class="www.csdn.spring.collection.set.User">
         <property name="name" value="deep" />
         <property name="age" value="21" />
     bean>
     <bean id="u2" class="www.csdn.spring.collection.set.User">
         <property name="name" value="deepsoul" />
         <property name="age" value="22">property>
     bean>
     <bean id="u3" class="www.csdn.spring.collection.set.User">
         <property name="name" value="chrp" />
         <property name="age" value="23" />
     bean>
     <bean id="u4" class="www.csdn.spring.collection.set.User">
         <property name="name" value="redarmy" />
         <property name="age" value="28" />
     bean>



 beans>

User.java

 package www.csdn.spring.collection.set;

 public class User {
     private String name;
     private Integer age;
     public void setName(String name) {
         this.name = name;
     }
     public void setAge(Integer age) {
         this.age = age;
     }

     public String getName() {
         return name;
     }
     public Integer getAge() {
         return age;
     }
     @Override
     public String toString() {
         return "User [name=" + name + ", age=" + age + "]";
     }


 }

Collection.java

 package www.csdn.spring.collection.set;

 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
 import java.util.Set;

 public class CollectionBean {
     //set集合
         public Set sets;

         public void setSets(Set sets) {
             this.sets = sets;
         }

         public CollectionBean() {
             super();
             System.out.println("========================");
         }

         //list集合
         public List users;
         public void setUsers(List users) {
             this.users = users;
         }

         //map集合
         public Map map;

         public void setMap(Map map) {
             this.map = map;
         }

         //props集合
         public Properties props;

         public void setProps(Properties props) {
             this.props = props;
         }

 }

TestBean.java

 package www.csdn.spring.collection.set;

 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Properties;
 import java.util.Set;

 import org.junit.Test;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;

 public class TestBean {

     @Test
     public void tests(){
         ApplicationContext context = new ClassPathXmlApplicationContext(
                 "classpath:spring-collection.xml");
         CollectionBean bean = context.getBean("collectionBean",
                 CollectionBean.class);
         System.out.println("---------------set----------------");
         //获取set集合
         Set sets=bean.sets;
         //得到迭代器
         Iterator it=sets.iterator();
         //遍历
         while (it.hasNext()){
             System.out.println(it.next());
         }


         System.out.println("--------------list----------------");
         List users = bean.users;
         for (User u : users) {
             System.out.println(u.getName() + "-------------" + u.getAge());
         }

         System.out.println("----------------map1---------------");
         //map1
         Map map=bean.map;
         //得到map集合的key键值的set集合
         Set setkeys=map.keySet();
         //得到key键值set集合的迭代器
         Iterator itkeys=setkeys.iterator();
         //迭代键值
         while(itkeys.hasNext()){
             //得到一个具体的键值
             Integer key = itkeys.next();
             //通过map集合的get(key)方法 获取key键值对应的value值
             User user =map.get(key);
             System.out.println(key+"------"+user.getName()+"-----"+"------"+user.getAge());
         }

         System.out.println("--------------map2--------------");
         //map2
         //获取实体对象的set集合
         Set> setentry=map.entrySet();
         //获取实体对象的迭代器
         Iterator> itentry =setentry.iterator();
         //迭代
         while(itentry.hasNext()){
             //得到具体的Entry对象
             Entry entry=itentry.next();
             //通过entry对象的getKey()和getValue得到
             System.out.println(entry.getKey()+"----"+entry.getValue().getName()+"------"+entry.getValue().getAge());
         }


         System.out.println("--------------props-------------");
         Properties props = bean.props;

         //得到这个结合键值的key的set集合
         Set setprops = props.stringPropertyNames();
         //String集合迭代器
         Iterator keystr = setprops.iterator();

         while(keystr.hasNext()){
             //具体键值
             String key = keystr.next();
             //getProperty(key)获取key对应的value值
             System.out.println(key+"-----"+props.getProperty(key));
         }
     }
 }

控制台输出：

2013-4-25 10:09:49 org.springframework.context.support.AbstractApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@50c4fe76: startup date [Thu Apr 25 10:09:49 CST 2013]; root of context hierarchy
2013-4-25 10:09:49 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [spring-collection.xml]
2013-4-25 10:09:49 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@3ff2cea2: defining beans [collectionBean,u1,u2,u3,u4]; root of factory hierarchy
========================
---------------set----------------
岑红军
军哥
哈哈
呵呵
嘿嘿
洗洗
--------------list----------------
deep-------------21
deepsoul-------------22
chrp-------------23
redarmy-------------28
----------------map1---------------
1------deep-----------21
2------deepsoul-----------22
3------chrp-----------23
--------------map2--------------
1----deep------21
2----deepsoul------22
3----chrp------23
--------------props-------------
3-----jdbc:access
2-----jdbc:mysql