1.内置scope
@Component
@Scope(BeanDefinition.SCOPE_SINGLETON)
public class SingletonTestService {
public String getHelloMessage() {
return "Hello " + this.getClass().getName();
}
}
@Component
@Scope(BeanDefinition.SCOPE_PROTOTYPE)
public class ProtoTypeTestService {
public String getHelloMessage() {
return "Hello " + this.getClass().getName();
}
}
@Component
@RequestScope
public class RequestTestService {
public String getHelloMessage() {
return "Hello " + this.getClass().getName();
}
}
@Component
@SessionScope
public class SessionTestService {
public String getHelloMessage() {
return "Hello " + this.getClass().getName();
}
}
@Component
@ApplicationScope
public class ApplicationTestService {
public String getHelloMessage() {
return "Hello " + this.getClass().getName();
}
}
测试代码
@Controller
public class SampleController implements ApplicationContextAware {
private ApplicationContext applicationContext;
@GetMapping("/hello")
@ResponseBody
public String helloWorld() {
test(SingletonTestService.class);
test(ProtoTypeTestService.class);
test(RequestTestService.class);
test(SessionTestService.class);
test(ApplicationTestService.class);
return "";
}
<T> boolean test(Class<T> cls)
{
T obj1=applicationContext.getBean(cls);
T obj2=applicationContext.getBean(cls);
boolean bFlag=(obj1==obj2);
System.out.println("begin");
System.out.println(cls);
System.out.println(obj1);
System.out.println(obj2);
System.out.println("end");
return bFlag;
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.applicationContext=applicationContext;
}
}
结果输出:
第一次:
begin
class sample.jetty.service.SingletonTestService
sample.jetty.service.SingletonTestService@23201692
sample.jetty.service.SingletonTestService@23201692
end
begin
class sample.jetty.service.ProtoTypeTestService
sample.jetty.service.ProtoTypeTestService@6a3b8a3d
sample.jetty.service.ProtoTypeTestService@30eca8a3
end
begin
class sample.jetty.service.RequestTestService
sample.jetty.service.RequestTestService@4dc430a0
sample.jetty.service.RequestTestService@4dc430a0
end
begin
class sample.jetty.service.SessionTestService
sample.jetty.service.SessionTestService@483e60cf
sample.jetty.service.SessionTestService@483e60cf
end
begin
class sample.jetty.service.ApplicationTestService
sample.jetty.service.ApplicationTestService@5fa1592c
sample.jetty.service.ApplicationTestService@5fa1592c
end
第二次
begin
class sample.jetty.service.SingletonTestService
sample.jetty.service.SingletonTestService@23201692
sample.jetty.service.SingletonTestService@23201692
end
begin
class sample.jetty.service.ProtoTypeTestService
sample.jetty.service.ProtoTypeTestService@1a24fae5
sample.jetty.service.ProtoTypeTestService@1e1b6d79
end
begin
class sample.jetty.service.RequestTestService
sample.jetty.service.RequestTestService@5b19f0de
sample.jetty.service.RequestTestService@5b19f0de
end
begin
class sample.jetty.service.SessionTestService
sample.jetty.service.SessionTestService@483e60cf
sample.jetty.service.SessionTestService@483e60cf
end
begin
class sample.jetty.service.ApplicationTestService
sample.jetty.service.ApplicationTestService@5fa1592c
sample.jetty.service.ApplicationTestService@5fa1592c
end
参考:
http://blog.csdn.net/elim168/article/details/75581612
2.自定义scope
1.实现Scope接口
2.声明CustomScopeConfigurer实例，并将自定义Scope加入其中
@Configuration
public class AppConfig {
@Bean
public CustomScopeConfigurer configurer()
{
CustomScopeConfigurer item=new CustomScopeConfigurer();
item.addScope("myScope",new MyScope());
return item;
}
}
@Component
@Scope("myScope")
public class CustomScopeTestService {
public String getHelloMessage() {
return "Hello " + this.getClass().getName();
}
}
