Spring框架--静态工厂(常规使用)
常规用法,没什么好说的,一看就懂
注解和Xml配置混用
public class BeanFactory { public Object getInstance(int a) throws Exception { if(a==1){ return new HelloWorld1(); }else{ return new HelloWorld2(); } } } public class HelloWorld1 { public HelloWorld1(){ System.out.println("new instance: HelloWorld1"); } public void sayHello(){ System.out.println("hello"); } } public class HelloWorld2 { public HelloWorld2(){ System.out.println("new instance: HelloWorld2"); } public void sayHello(){ System.out.println("hello"); } }
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; @Component public class TestBean { @Autowired HelloWorld1 helloWorld1; @Autowired HelloWorld2 helloWorld2; public HelloWorld1 getHelloWorld1() { return helloWorld1; } public HelloWorld2 getHelloWorld2() { return helloWorld2; } }
Xml配置
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:cache="http://www.springframework.org/schema/cache" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd"> <bean id="beanFactory" class="com.client.bean.BeanFactory"/> <bean id="helloWorld1" factory-bean="beanFactory" factory-method="getInstance"> <constructor-arg type="int"><value>1</value></constructor-arg> </bean> <bean id="helloWorld2" factory-bean="beanFactory" factory-method="getInstance"> <constructor-arg type="int"><value>2</value></constructor-arg> </bean> <context:component-scan base-package="com.client.bean" /> </beans>
疯狂的妞妞 :每一天,做什么都好,不要什么都不做!