package com.imooc.beanannotation.multibean;

public interface BeanInterface {

}

package com.imooc.beanannotation.multibean;

import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

@Order(2)
@Component
public class BeanImplOne implements BeanInterface
 
 {

}

package com.imooc.beanannotation.multibean;

import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

@Order(1)
@Component
public class BeanImplTwo implements BeanInterface {

}

package com.imooc.beanannotation.multibean;

import java.util.List
 
;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;

@Component
public class BeanInvoker {

    @Autowired
    private List<BeanInterface> list;

    @Autowired
    private Map<String, BeanInterface> map;
 


    @Autowired
    @Qualifier("beanImplTwo")
    private BeanInterface beanInterface;

    public void say() {
        if (null != list && 0 != list.size()) {
            System.out.println("list...");
            for (BeanInterface bean : list) {
                System.out.println(bean.getClass().getName());
            }
        } else {
            System.out.println("List<BeanInterface> list is null !!!!!!!!!!");
        }

        System.out.println();

        if (null != map && 0 != map.size()) {
            System.out.println("map...");
            for (Map.Entry<String, BeanInterface> entry : map.entrySet()) {
                System.out.println(entry.getKey() + "      " + entry.getValue().getClass().getName());
            }
        } else {
            System.out.println("Map<String, BeanInterface> map is null !!!!!!!!!!");
        }

        System.out.println();
        if (null != beanInterface) {
            System.out.println(beanInterface.getClass().getName());
        } else {
            System.out.println("beanInterface is null...");
        }


    }

}

@order 註解可以調整注入順序，但只對list有效，對map無效。
對於向map中注入，bean注入後string為該bean的id。

@Autowired
    @Qualifier("beanImplTwo")
    private BeanInterface beanInterface;

@Qualifier可以縮小範圍，指定注入物件的id
@request：這個屬性/方法必須複製，相當於@Autowired（request=true）