SpringBoot 使用阿里fastjson进行JSONObject.parseObject反序列化时NULL值处理以及嵌套泛型处理

package com.example.demo.config;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.nio.charset.StandardCharsets;
import java.util.List;
@Configuration
public class JsonObjectMapper  extends WebMvcConfigurationSupport {

    @Override
    public void configureMessageConverters(List> converters) {
        //1、定义一个convert转换消息的对象
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        //2、添加fastjson的配置信息
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteNullListAsEmpty);
        //3、在convert中添加配置信息
        fastConverter.setFastJsonConfig(fastJsonConfig);
        fastConverter.setDefaultCharset(StandardCharsets.UTF_8);
        //4、将convert添加到converters中
        converters.add(fastConverter);
        //5、追加默认转换器
        super.addDefaultHttpMessageConverters(converters);
    }
}

class com.alibaba.fastjson.JSonObject cannot be cast to class com.example.demo.Result

public class Result {
    
    private Integer result;
    
    private List data;

}

Result data = JSONObject.parseObject(result, new TypeReference>(){});