Spring构造函数注入

Question

Is it possible to construct an object manually and let some other arguments be injected by Spring?

eg

 class A 
 @Autowired
 private SomeDao dao;
 A(String x, String y) {}

Answer 1

Your example is using field injection, not constructor injection.

The best way is generally to use JavaConfig. Your @Bean methods can take parameters (which Spring will autowire), which you can combine with your other options when you call new .

Answer 2

也许org.springframework.web.context.support.SpringBeanAutowiringSupport类是您正在寻找的类，请尝试调用：

SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);

Answer 3

You can use autowireBean from the AutowireCapableBeanFactory . Given your applicationContext, you call getAutowireCapableBeanFactory() and then autowire your instance:

applicationContext.getAutowireCapableBeanFactory().autowireBean( new A("x", "y" ) );