MybatisPlus如何自定义TypeHandler映射JSON类型为List

@Data
@TableName(value = "report", autoResultMap = true)
public class Report { 
    private static final long serialVersionUID = 1L; 
    @ApiModelProperty("id")
    @TableId(value = "id", type = IdType.AUTO)
    private Integer id;
 
    @ApiModelProperty("报名信息")
    @TableField(typeHandler = ReportUserListTypeHandler.class)
    private List<ReportUser> reportInfo; 
}

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedJdbcTypes;
import org.apache.ibatis.type.MappedTypes;
 
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List; 
 
@MappedJdbcTypes(JdbcType.VARBINARY)
@MappedTypes({List.class})
public abstract class ListTypeHandler<T> extends BaseTypeHandler<List<T>> {
 
    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, List<T> parameter, JdbcType jdbcType) throws SQLException {
        String content = CollUtil.isEmpty(parameter) ? null : JSON.toJSONString(parameter);
        ps.setString(i, content);
    }
 
    @Override
    public List<T> getNullableResult(ResultSet rs, String columnName) throws SQLException {
        return this.getListByJsonArrayString(rs.getString(columnName));
    }
 
    @Override
    public List<T> getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        return this.getListByJsonArrayString(rs.getString(columnIndex));
    }
 
    @Override
    public List<T> getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        return this.getListByJsonArrayString(cs.getString(columnIndex));
    } 
 
    private List<T> getListByJsonArrayString(String content) {
        return StrUtil.isBlank(content) ? new ArrayList<>() : JSON.parseObject(content, this.specificType());
    }
 
    /**
     * 具体类型，由子类提供
     *
     * @return 具体类型
     */
    protected abstract TypeReference<List<T>> specificType();  
}

import com.alibaba.fastjson.TypeReference;
import com.hanku.business.model.ReportUser; 
import java.util.List;  

public class ReportUserListTypeHandler extends ListTypeHandler<ReportUser> { 
    @Override
    protected TypeReference<List<ReportUser>> specificType() {
        return new TypeReference<List<ReportUser>>() {
        };
    }    
}

@Slf4j
@MappedTypes({Object.class})
@MappedJdbcTypes(JdbcType.VARCHAR)
public class WeightListTypeHandler  extends AbstractJsonTypeHandler<Object> {
    private static Gson gson = new Gson();
    private final Class<?> type;
    public WeightListTypeHandler(Class<?> type) {
        if (log.isTraceEnabled()) {
            log.trace("WeightListTypeHandler(" + type + ")");
        }
        Assert.notNull(type, "Type argument cannot be null");
        this.type = type;
    }
    @Override
    protected Object parse(String json) {
        Type type1 = new TypeToken<Map<String, List<WeightItem>>>(){}.getType();
        return gson.fromJson(json, type1);
    }
    @Override
    protected String toJson(Object obj) {
        return gson.toJson(obj);
    }
    public static void setGson(Gson gson) {
        Assert.notNull(gson, "Gson should not be null");
        WeightListTypeHandler.gson = gson;
    }
}

@Data
@NoArgsConstructor
@TableName(value = "mix_target",autoResultMap = true)
public class MixTarget extends Model<MixTarget> {
    @TableId(value = "id", type = IdType.AUTO)
    private Long id;
    /**
     *指标描述
     */
    @TableField("description")
    private String description;
    /**
     * 指标名
     */
    @TableField("name")
    private String name;
    /**
     * 对应属性名
     */
    @TableField("property_name")
    private String propertyName;
    /**
     * 起始点类型
     */
    @TableField("source_type")
    private String sourceType;
    /**
     * 属性对应权值列表
     * key 属性名 value指定条件下的权值
     */
    @TableField(value = "weight_list",typeHandler = WeightListTypeHandler.class,jdbcType = JdbcType.CLOB)
    private Map<String, List<WeightItem>> weightList;
    /**
     * 运行状态
     * 0 新建未运行
     * 1 运行中
     * 2 已运行 成功
     * 3 已运行 失败
     */
    @TableField("status")
    private Integer status;
    /**
     * 是否可用
     * 1 true
     * 0 false
     */
    @TableField("enable")
    private Integer enable;
    @TableField("create_time")
    private LocalDateTime createTime;
}