Spring的三种依赖注入方式

1.构造器注入

@Service
public class TestService implements IService{

private AService aService;

/**
* 如果该类只有一个构造方法，可省略@Autowired
**/
@Autowired
public AService(AService aService){
     this.aService = aService;
}

}

2.setter方法注入

@Service
public class TestService implements IService{

private AService aService;

public void setAService(AService aService){
     this.aService = aService;
}

}

3.属性方法注入

@Service
public class TestService implements IService{

@Autowired
private AService aService;


}