Spring带有Map的Setter进行注入示例 _setter

带有地图示例的Setter注入

【Spring带有Map的Setter进行注入示例】在此示例中, 我们使用map作为一个问题的答案, 该问题的答案为键, 而用户名为值。在这里, 我们将键和值对都用作字符串。
像前面的示例一样, 它是论坛的示例, 其中一个问题可以有多个答案。
Question.java
此类包含三个属性, 即getters＆setters和displayInfo()方法以显示信息。

package com.srcmini; 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; //getters and setterspublic 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属性用于定义键和值信息。

< ?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.srcmini.Question"> < property name="id" value="http://www.srcmini.com/1"> < /property> < property name="name" value="http://www.srcmini.com/What is Java?"> < /property> < property name="answers"> < map> < entry key="Java is a programming language"value="http://www.srcmini.com/Sonoo Jaiswal"> < /entry> < entry key="Java is a Platform" value="http://www.srcmini.com/Sachin Yadav"> < /entry> < /map> < /property> < /bean> < /beans>

Test.java
此类从applicationContext.xml文件获取Bean, 然后调用displayInfo()方法。

package com.srcmini; 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(); } }

下载此示例(使用MyEclipse IDE开发)