修改类型转换时有,出错的情况

src/test/java/com/dreamchaser/depository_manage/BarChartTest.java

@@ -7,6 +7,7 @@ import com.dreamchaser.depository_manage.service.DepositoryService;
 import com.dreamchaser.depository_manage.service.MaterialService;
 import com.dreamchaser.depository_manage.service.MaterialTypeService;
 import com.dreamchaser.depository_manage.utils.DateUtil;
+import com.dreamchaser.depository_manage.utils.ObjectFormatUtil;
 import lombok.Data;
 import org.junit.Test;
 import org.junit.runner.RunWith;

src/test/java/com/dreamchaser/depository_manage/LineChartTest.java

@@ -8,6 +8,7 @@ import com.dreamchaser.depository_manage.service.DepositoryService;
 import com.dreamchaser.depository_manage.service.MaterialService;
 import com.dreamchaser.depository_manage.service.MaterialTypeService;
 import com.dreamchaser.depository_manage.utils.DateUtil;
+import com.dreamchaser.depository_manage.utils.ObjectFormatUtil;
 import lombok.Data;
 import org.junit.Test;
 import org.junit.runner.RunWith;