封装好的类,方便文本操作。读取为ArrayList,从ArrayList保存为文本,从DataTable保存为文本,从string保存为文本:publicstringFileNamePathpublicArrayListGetRead()publicvoidGetWrite(ArrayListal,boolappend)publicvoidGetWrite(DataTabledt,boolappend)publicvoidGetWrite(strings,boolappend)