Spring FactoryBean实现类研究[持续更新……]

MapFactoryBean

可以通过此FactoryBean动态的设定某个接口或者类的自动注入后在被Controller使用时具体使用的是哪个实现类。但是在Controller中注入时需要使用@Resource注解注入，因为如果出现了多个MapFactoryBean的配置将会无法注入，即使使用了@Qulifier指定了id也不行；且注入的类需要写成Map类而不是MapFactoryBean

//WebMvcConfigurerAdapter的实现类配置MapFactoryBean如下
@Bean(name="testFamilyMapFactoryBean")
    public MapFactoryBean mapFactoryBean2(){
        MapFactoryBean fmb = new MapFactoryBean();
        fmb.setTargetMapClass(HashMap.class);
        Map map = new HashMap<>();
        map.put("testFamily",testFamily());
        fmb.setSourceMap(map);
        return fmb;
    }

    @Bean(name="familyMapFactoryBean")
    public MapFactoryBean mapFactoryBean(){
        MapFactoryBean fmb = new MapFactoryBean();
        fmb.setTargetMapClass(HashMap.class);
        Map map = new HashMap<>();
        map.put("familyService",familyService);
        map.put("chinaFamilyService",chinaFamilyService);
        map.put("americanFamilyService",americanFamilyService);
        fmb.setSourceMap(map);
        return fmb;
    }

//Controller中的配置
    @Resource(name = "familyMapFactoryBean")
    /*@Autowired
    @Qualifier("familyMapFactoryBean")*/
    private Map mapFactoryBean;
    @Resource(name="testFamilyMapFactoryBean")
    /*@Autowired
    @Qualifier("testFamilyMapFactoryBean")*/
    private Map mapFactoryBean2;

推荐博文

Spring MapFactoryBean应用详解
Spring FactoryBean应用