当父类的父类定义了范型， 子类反序列化失败

[wkkata]

public class SuperBaseReply {
private List items;

public List<T> getItems() {
    return items;
}

public void setItems(List<T> items) {
    this.items = items;
}

}

public class BaseReply extends SuperBaseReply {

}

public class TestReply extends BaseReply {

}

当反序列化TestReply的时候， getItems会报失败，JSONOBJECT无法转的问题

[timandy]

泛型参数没有继承到子类，导致编译擦除引起的。建议将泛型参数继承到子类反序列化时使用T ypeR eference

[TomYule]

springboot 可以如下配置 解决

@Configuration
@EnableWebMvc
public class Application extends WebMvcConfigurerAdapter {

 /**
     * 使用阿里 FastJson 作为JSON MessageConverter
     * @param converters
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();

//        log.info("converters:" + converters.toString());
        List<MediaType> supportMediaTypeList = new ArrayList<>();
//        supportMediaTypeList.add(MediaType.TEXT_HTML);
        supportMediaTypeList.add(MediaType.APPLICATION_JSON_UTF8);
//        supportMediaTypeList.add(MediaType.IMAGE_GIF);
//        supportMediaTypeList.add(MediaType.IMAGE_JPEG);
//        supportMediaTypeList.add(MediaType.IMAGE_PNG);

        FastJsonConfig config = new FastJsonConfig();
        config.setDateFormat("yyyy-MM-dd HH:mm:ss");
        config.setSerializerFeatures(
                //保留空的字段
                SerializerFeature.WriteMapNullValue,
                //String null -> ""
                SerializerFeature.WriteNullStringAsEmpty,
                //Number null -> 0
                SerializerFeature.WriteNullNumberAsZero,
                //List null-> []
                SerializerFeature.WriteNullListAsEmpty,
                //Boolean null -> false
                SerializerFeature.WriteNullBooleanAsFalse);
        converter.setFastJsonConfig(config);
        converter.setSupportedMediaTypes(supportMediaTypeList);
        converter.setDefaultCharset(Charset.forName("UTF-8"));
        converters.add(converter);
    }
}