使用@Configuration进行设置;
Xml:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd"> <context:component-scan base-package="com.stono.sprtest"></context:component-scan> </beans>
JavaConfig:
package com.stono.sprtest; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Scope; @Configuration public class SingerConfig { @Bean @Scope("prototype") // 如果加了这个就会导致有两个Cymbal对象; public InstrumentI cymbal() { return new Cymbal(); } @Bean public Singer3 singer3() { // 参数里面的cymbal()不会新建Bean,还是之前那个单例实体; return new Singer3(cymbal(), "newstr"); } }
AppBean:
package com.stono.sprtest; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class AppBeans8 { @SuppressWarnings("resource") public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext("appbeans8.xml"); Singer3 singer3 = (Singer3) context.getBean("singer3"); System.out.println(singer3); Object bean = context.getBean("cymbal"); System.out.println(bean); } }
POJO:
package com.stono.sprtest; import org.springframework.beans.factory.annotation.Autowired; public class Singer3 { @Autowired private InstrumentI instrument; private String name; public Singer3(InstrumentI instrument, String name) { this.instrument = instrument; this.name = name; } @Override public String toString() { return "Singer2 [instrument=" + instrument + ", name=" + name + "]"; } }
package com.stono.sprtest; public class Cymbal implements InstrumentI { }
时间: 2024-11-02 17:36:28