在此示例中，我們使用
map 作為具有已發(fā)布用戶名答案的答案。在這里，我們將鍵和值對(duì)都用作字符串。
像前面的示例一樣，它是論壇的示例，其中
一個(gè)問題可以有多個(gè)答案。
Question.java
此類包含三個(gè)屬性，兩個(gè)構(gòu)造函數(shù)和用于顯示信息的displayInfo()方法。
package com.nhooo;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
public class Question {
private int id;
private String name;
private Map<String,String> answers;
public Question() {}
public Question(int id, String name, Map<String, String> answers) {
super();
this.id = id;
this.name = name;
this.answers = answers;
}
public void displayInfo(){
System.out.println("question id:"+id);
System.out.println("question name:"+name);
System.out.println("Answers....");
Set<Entry<String, String>> set=answers.entrySet();
Iterator<Entry<String, String>> itr=set.iterator();
while(itr.hasNext()){
Entry<String,String> entry=itr.next();
System.out.println("Answer:"+entry.getKey()+" Posted By:"+entry.getValue());
}
}
}
applicationContext.xml
map 的
entry 屬性用于定義鍵和值信息。
<?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:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="q" class="com.nhooo.Question">
<constructor-arg value="11"></constructor-arg>
<constructor-arg value="What is Java?"></constructor-arg>
<constructor-arg>
<map>
<entry key="Java is a Programming Language" value="Ajay Kumar"></entry>
<entry key="Java is a Platform" value="John Smith"></entry>
<entry key="Java is an Island" value="Raj Kumar"></entry>
</map>
</constructor-arg>
</bean>
</beans>
Test.java
此類從applicationContext.xml文件獲取Bean并調(diào)用displayInfo()方法。
package com.nhooo;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
public class Test {
public static void main(String[] args) {
Resource r=new ClassPathResource("applicationContext.xml");
BeanFactory factory=new XmlBeanFactory(r);
Question q=(Question)factory.getBean("q");
q.displayInfo();
}
}