继承至ListSheet<T>的泛型类导出时抛ClassCastException

[wangguanquan]

定义类如下

public class MyListSheet<T> extends ListSheet<T> {

}

// 导出命令
new Workbook().addSheet(new MyListSheet<>(list)).writeTo(Paths.get("d:/"));

异常信息

java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class

	at org.ttzero.excel.entity.ListSheet.getTClass(ListSheet.java:326)
	at org.ttzero.excel.entity.ListSheet.init(ListSheet.java:357)
	at org.ttzero.excel.entity.ListSheet.getHeaderColumns(ListSheet.java:641)
	at org.ttzero.excel.entity.Sheet.getAndSortHeaderColumns(Sheet.java:1153)
	at org.ttzero.excel.entity.Sheet.writeTo(Sheet.java:1312)
	at org.ttzero.excel.entity.e7.XMLWorkbookWriter.createTemp(XMLWorkbookWriter.java:413)
	at org.ttzero.excel.entity.e7.XMLWorkbookWriter.writeTo(XMLWorkbookWriter.java:112)
	at org.ttzero.excel.entity.Workbook.writeTo(Workbook.java:860)