/**
 * mvc配置类
 * @author: nss
 * @date: 2018/10/17 20:17
 */
@Configuration
public class MvcConfig extends WebMvcConfigurerAdapter {


    private final ObjectMapper mapper;

    @Autowired
    public MvcConfig(ObjectMapper mapper) {
        this.mapper = mapper;
    }

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        //允许出现特殊字符和转义符
        mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS, true);
        mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        //允许出现单引号
        mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
        //是否格式化输出
        mapper.configure(SerializationFeature.INDENT_OUTPUT,true);
        //允许对象忽略json中不存在的属性,忽略无法转换的对象 “No serializer found for class com.xxx.xxx”
        mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS,true);
        //列换成json时,将所有的long变成string
        SimpleModule simpleModule = new SimpleModule();
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
        mapper.registerModule(simpleModule);
        //为空和null的不序列化
        //Todo 别删
        //mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        jackson2HttpMessageConverter.setObjectMapper(mapper);
        converters.add(jackson2HttpMessageConverter);
        super.configureMessageConverters(converters);
    }

}