问题描述
默认情况下，spring bean是单例的.我想知道是否有一种方法可以获取同一bean的多个实例进行处理.
By default, spring beans are singletons. I am wondering if there is a way to get multiple instances of same bean for processing.
这是我目前正在做的
@Configuration
public class ApplicationMain {
@Value("${service.num: not configured}")
private int num;
//more code
@PostConstruct
public void run(){
for (int i = 0; i < num ; i++) {
MyService ser = new MyService(i);
Future<?> tasks = executor.submit(ser);
}
}
}
这是服务类
public class MyService implements Runnable {
private String name;
public Myservice(int i){
name=String.ValueOf(i);
}
}
我在这里简化了用例.我想将MyService作为spring bean，并在上述for循环中基于configuartion(num)获取尽可能多的内容?想知道这怎么可能.
I have simplified my usecase here.I want to have MyService as spring bean and get as many as possible based on configuartion (which is num) in the above for-loop? wondering how that is possible.
谢谢
推荐答案
首先，您必须将MyService制成Spring bean.您可以通过使用@Component注释类来实现.接下来，正如您所说，Spring bean默认情况下为Singletons，因此可以通过添加另一个注释-@Scope("prototype")进行更改.
First you'll have to make MyService a Spring bean. You can do this by annotating the class with @Component. Next, as you say, Spring beans are Singletons by default, so this can be changed with one more annotation - @Scope("prototype").
原型bean范围意味着每次您向Spring请求该bean的实例时，都会创建一个新实例.这适用于自动装配，使用getBean()或使用bean工厂向应用程序上下文询问bean.
A prototype bean scope means that each time you ask Spring for an instance of the bean, a new instance will be created. This applies to Autowiring, asking the application context for the bean with getBean(), or using a bean factory.
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