(1) pom修改

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
</dependency>
为：
<dependency>
    <groupId>com.alibaba.fastjson2</groupId>
    <artifactId>fastjson2</artifactId>
</dependency>
    <dependency>
        <groupId>com.alibaba.fastjson2</groupId>
        <artifactId>fastjson2-extension-spring6</artifactId>
        <version>2.0.46</version>
    </dependency>

（2） import com.alibaba.fastjson.JSON; 替换为 import com.alibaba.fastjson2.JSON;

（3）getInnerMap：
Map<String, Object> innerMap = JSON.parseObject(JSONObject.toJSONString(obj)).getInnerMap();
替换为
Map<String, Object> innerMap = JSON.parseObject(JSONObject.toJSONString(obj), Map.class);
（4） import com.alibaba.fastjson.support.spring.GenericFastJsonRedisSerializer;
替换为：
import com.alibaba.fastjson2.support.spring6.data.redis.GenericFastJsonRedisSerializer;
（5） String original = JSONObject.toJSONString(innerMap, SerializerFeature.MapSortField);
替换为：
String original = JSONObject.toJSONString(innerMap, JSONWriter.Feature.MapSortField);
（6）String json = JSON.toJSONStringWithDateFormat(this, DateRangeQueryBuilder.TIME_FORMAT, SerializerFeature.WriteDateUseDateFormat);
替换为：String json = JSON.toJSONString(this, DateRangeQueryBuilder.TIME_FORMAT);
（6）JSONObject.toJSONString(map, SerializerFeature.SortField)
替换为：
JSONObject.toJSONString(userInfos)