Spring中集合的注入方式（080106）

在前面所说的注入都是基本的简单类型，下面我们来讨论比较复杂的注入，对List,Set,Map,Properties的注入.
1 List
先看一下代码：

package com.jnotnull;
import java.util.List;

public class HelloWorld {
	public List message = null;

	public List getMessage() {
		return message;
	}

	public void setMessage(List message) {
		this.message = message;
	}

}

配置文档：
config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans Public "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id ="HelloWorld" class="com.jnotnull.HelloWorld">
 <property name ="message">
  <list>
   <value>aaa</value>
   <value>bbb</value>
   <value>ccc</value>
  </list>
 </property>
<bean>
</beans>

2 Set
先看一下代码：

package com.jnotnull;
import java.util.Set;

public class HelloWorld {
	public Set message = null;

	public Set getMessage() {
		return message;
	}

	public void setMessage(Set message) {
		this.message = message;
	}

}

配置文档：
config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans Public "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id ="HelloWorld" class="com.jnotnull.HelloWorld">
 <property name ="message">
  <set>
   <value>aaa</value>
   <value>bbb</value>
   <value>ccc</value>
  </set>
 </property>
<bean>
</beans>

3 Map
先看一下代码：

package com.jnotnull;
import java.util.Map;

public class HelloWorld {
	public Map message = null;

	public Map getMessage() {
		return message;
	}

	public void setMessage(Map message) {
		this.message = message;
	}

}

配置文档：
config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans Public "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id ="HelloWorld" class="com.jnotnull.HelloWorld">
 <property name ="message">
  <map>
   <entry key="111">
     <value>aaa</value>
   </entry>
   <entry key="222">
   <value>bbb</value>
   </entry>
   <entry key="333">
   <value>ccc</value>
   </entry>
  </map>
 </property>
<bean>
</beans>

4 Properties
先看一下代码：

package com.jnotnull;
import java.util.Map;

public class HelloWorld {
	public Properties message = null;

	public Properties getMessage() {
		return message;
	}

	public void setMessage(Properties message) {
		this.message = message;
	}

}

配置文档：
config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans Public "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id ="HelloWorld" class="com.jnotnull.HelloWorld">
 <property name ="message">
  <props>
   <prop key="111">aaa</prop>
   <prop key="222">bbb</prop>
   <prop key="333">ccc</prop>
  </props>
 </property>
<bean>
</beans>

看，同样很简单；