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/beans http://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/beans http://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(); }