Spring学习笔记_装配bean_02

Spring的属性的注入包括单个properties的注入，list，set，map，properties集中类型。下面是代码示例。

1、list的属性注入

applicationContext的配置：

然后新建一下几个类：乐器类Instrument.java，钢琴类Piano.java，萨克斯类：Saxophone，吉它类Guitar.java，一人乐队类OneManBand.java

public interface Instrument {
	
	public void paly();
}

public class Guitar implements Instrument{

	Logger logger=LoggerFactory.getLogger(Saxophone.class);

	public void paly() {
		
		logger.info("******吉它表演。。。******");
		
	}

}

public class Saxophone implements Instrument{
	
	Logger logger=LoggerFactory.getLogger(Saxophone.class);

	public void paly() {
		
		logger.info("******萨克斯表演。。。******");
		
	}

}

public class Piano implements Instrument{

	Logger logger=LoggerFactory.getLogger(Saxophone.class);

	public void paly() {
		
		logger.info("******钢琴表演。。。******");
		
	}

}

public class OneManBand implements Performer{
	
	private List instruments;

	public void perform() throws Exception {
		for (Instrument instrument : instruments) {
			instrument.paly();
		}
		
	}
	public void setInstruments(List instruments) {
		this.instruments = instruments;
	}

}

然后写一个测试类就可以测试类：

public class Test {
	
	public static void main(String[] args) throws Exception {
		ApplicationContext ctx=
	      		   new ClassPathXmlApplicationContext("applicationContext.xml");
		OneManBand oneManBand=(OneManBand)ctx.getBean("Jack");
		oneManBand.perform();
	    
	}

}

输出结果：

  INFO  2015-05-31 21:48:53,235 [message] ******萨克斯表演。。。******
    INFO  2015-05-31 21:48:53,235 [message] ******吉它表演。。。******
    INFO  2015-05-31 21:48:53,235 [message] ******钢琴表演。。。******

2、Set属性注入跟list集合注入差不多，list允许元素有重复的值，set不能有重复值。xml中的配置也类似。

3、Map属性注入

applicationContext.xml中的配置

然后新建一个一人乐队类：OnemanBandMap.java（其它几个类同上面）

public class OnemanBandMap implements Performer{
	
	private Map instruments;

	public void perform() throws Exception {
		
		for (String key : instruments.keySet()) {
			Instrument instrument=instruments.get(key);
			instrument.paly();
		}
	}

	public void setInstruments(Map instruments) {
		this.instruments = instruments;
	}

}

测试类：

public class Test {
	
	public static void main(String[] args) throws Exception {
		ApplicationContext ctx=
	      		   new ClassPathXmlApplicationContext("applicationContext.xml");
		 OnemanBandMap lucy=(OnemanBandMap)ctx.getBean("Lucy");
		    lucy.perform();
	    
	}

}

输出结果：

   INFO  2015-05-31 21:55:07,599 [message] ******萨克斯表演。。。******
    INFO  2015-05-31 21:55:07,599 [message] ******吉它表演。。。******
    INFO  2015-05-31 21:55:07,599 [message] ******钢琴表演。。。******