Spring集合类型注入

在Spring的配置文件applicationContext.xml中,可以通过<list/>,<set/>,<list/>和<map/>标签来注入设置与集合类型相对应的List,Set,数组和Map集合的值.
首先设计一个类,代码如下:

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

public class ComAttribute {
	
	private List listValue;
	private Set setValue;
	private String[] arrayValue;
	private Map mapValue;
	public List getListValue() {
		return listValue;
	}
	public void setListValue(List listValue) {
		this.listValue = listValue;
	}
	public Set getSetValue() {
		return setValue;
	}
	public void setSetValue(Set setValue) {
		this.setValue = setValue;
	}
	public String[] getArrayValue() {
		return arrayValue;
	}
	public void setArrayValue(String[] arrayValue) {
		this.arrayValue = arrayValue;
	}
	public Map getMapValue() {
		return mapValue;
	}
	public void setMapValue(Map mapValue) {
		this.mapValue = mapValue;
	}
}

接着设计一个测试类,代码如下:

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import junit.framework.TestCase;

public class testComAttribute extends TestCase {
	private BeanFactory factory;
	
	//重写TestCase父类
	protected void setup() throws Exception {
		factory = new ClassPathXmlApplicationContext("applicationContext.xml");
	}
	
	public void testInjection() {
		//调用工厂Bean
		ComAttribute comAttribute = factory.getBean("comAttribute");
		System.out.println("comAttribute.listValue = " + comAttribute.getListValue());
		System.out.println("comAttribute.setValue = " + comAttribute.getSetValue());
		System.out.println("comAttribute.arrayValue = " + comAttribute.getArrayValue());
		System.out.println("comAttribute.mapValue = " + comAttribute.getMapValue());
	}
}

applicationContext.xml文件的内容如下:

<bean id="comAttribute" class=".../ComAttribute">
	<property name="listValue">
		<list>
			<value>list_1</value>
		    <value>list_2</value>
		</list>
	</property>
	<property name="setValue">
		<set>
			<value>set_1</value>
			<value>set_2</value>
		</set>
	</property>
	<property name="arrayValue">
		<list>
			<value>array_1</value>
			<value>array_2</value>
		</list>
	</property>
	<property name="mapValue">
		<map>
			<entry key="key_1" value="value_1"/>
			<entry key="key_2" value="value_2"/>
		</map>
	</property>
</bean>

注意:标记<map>中的子标记<entry>中的key和value的值不能是bean,list,set,map和value元素;同时标记<set>中子标记<value>的值也不能是上面的元素.