SpringBoot 自定义内容协商策略 configureContentNegotiation

1. 在自定义的config配置类中，重写configureContentNegotiation方法

2. @Bean
       public WebMvcConfigurer webMvcConfigurer(){
           return new WebMvcConfigurer() {
               /**
                * 自定义内容协商策略
                * @param configurer
                */
               @Override
               public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
                   // 自定义策略
                   // ContentNegotiationConfigurer mediaTypes(@Nullable Map<String, MediaType> mediaTypes)
                   Map<String, MediaType> map = new HashMap<>();
                   map.put("json", MediaType.APPLICATION_JSON);
                   map.put("xml", MediaType.APPLICATION_ATOM_XML);
                   map.put("gg",MediaType.parseMediaType("applicaion/x-z"));
                   // 指定基于参数的解析类型
                   ParameterContentNegotiationStrategy negotiationStrategy = new ParameterContentNegotiationStrategy(map);
                   // 指定基于请求头的解析
                   HeaderContentNegotiationStrategy headerContentNegotiationStrategy = new HeaderContentNegotiationStrategy();
                   configurer.strategies(Arrays.asList(negotiationStrategy));
               }
           };
       }