@Import(User.class)
@Configuration(proxyBeanMethods = true)
@EnableConfigurationProperties(Car.class)
//proxyBeanMEthods
// 设置为false意味着跳过扫描容器的步骤，直接new一个新的组件而不是使用容器中的组件
public class MyConfiguration implements WebMvcConfigurer {
    @Bean
    @ConditionalOnClass(name = "Pet")
    public User getUser(){
        return new User("yan",18,getPet());
    }
    //@Bean("tom")
    public Pet getPet(){
        return new Pet("tom");
    }
    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        UrlPathHelper urlPathHelper = new UrlPathHelper();
        urlPathHelper.setRemoveSemicolonContent(false);
        configurer.setUrlPathHelper(urlPathHelper);
    }
//自定义转换器，转换自定义的字符串格式
    @Override
    public void addFormatters(FormatterRegistry registry) {
        registry.addConverter(new Converter<String, Pet>() {
            @Override
            public Pet convert(String source) {
                String[] split = source.split(",");
                return new Pet(split[0]);
            }
        });
    }
  //如果想把自定义的类型也融入到参数内容协商里面去
  //需要重写内容协商配置类
  //注意：这里会覆盖所有的映射
  //所以我们需要自己添加映射 
    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        //configurer.strategies();
        HashMap<String, MediaType> stringMediaTypeHashMap = new HashMap<>();
        stringMediaTypeHashMap.put("xml",MediaType.APPLICATION_XML);
        stringMediaTypeHashMap.put("json",MediaType.APPLICATION_JSON);
        stringMediaTypeHashMap.put("yan",MediaType.parseMediaType("application/yan"));
        //参数响应
        ParameterContentNegotiationStrategy parameterContentNegotiationStrategy = new ParameterContentNegotiationStrategy(stringMediaTypeHashMap);
        //若想基于头的响应 则应该增加策略
        HeaderContentNegotiationStrategy headStrategy=new HeaderContentNegotiationStrategy();
        configurer.strategies(Arrays.asList(parameterContentNegotiationStrategy,headStrategy));
    }
  //添加自定义messageConverter
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(new YanMessageConverter());
    }
}