spring @Autowire 属性与 setter

使用@Autowired属性和setter方法的Spring依赖注入

java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
@Component
public class UserService {
    private UserDao userDao;
    @Autowired
    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }
    public void getUserInfo() {
        userDao.getUserInfo();
    }
}
@Component
public class UserDao {
    public void getUserInfo() {
        System.out.println("获取用户信息");
    }
}
public class Main {
    public static void main(String[] args) {
        // 创建Spring容器
        ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
        // 从容器中获取UserService对象
        UserService userService = context.getBean(UserService.class);
        // 调用UserService的方法
        userService.getUserInfo();
    }
}