想要在Spring-Common.xml中引用 Spring-Output.xml中定义的bean 需要使用<ref bean="XXX"/>标签，如果是同一个xml文件中引用则使用<ref local="XXX"/>标签。

 package com.spring.output;public class OutputHelper {IOutputGenerator outputGenerator;public void generateOutput(){this.outputGenerator.generateOutput();}public void setOutputGenerator(IOutputGenerator outputGenerator){this.outputGenerator = outputGenerator;}
}

Spring-Output.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsd"><bean id="CsvOutputGenerator" class="com.spring.output.impl.CsvOutputGenerator" /><bean id="JsonOutputGenerator" class="com.spring.output.impl.JsonOutputGenerator" /></beans>

Spring-Common.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsd"><bean id="OutputHelper" class="com.spring.output.OutputHelper"><property name="outputGenerator" ><ref bean="CsvOutputGenerator"/></property></bean>
</beans>

在调用的上下文方法的时候这样写：

 package com.spring.hello;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;import com.spring.output.OutputHelper;
public class App {private static ApplicationContext context;public static void main(String[] args){context = new ClassPathXmlApplicationContext(new String[] {"Spring-Common.xml","Spring-Output.xml"});OutputHelper output = (OutputHelper)context.getBean("OutputHelper");output.generateOutput();}
}

CsvOutputGenerator.java

package com.spring.output.impl;import com.spring.output.IOutputGenerator;public class CsvOutputGenerator implements IOutputGenerator {public void generateOutput() {System.out.println("Creating CsvOutputGenerator  Output......");}
}

JsonOutputGenerator.java

 package com.spring.output.impl;
import com.spring.output.IOutputGenerator;
public class JsonOutputGenerator implements IOutputGenerator {public void generateOutput() {System.out.println("Creating JsonOutputGenerator output.......");}
}

IOutputGenerator.java

package com.spring.output;public interface IOutputGenerator {public void generateOutput();
}