当前，我正在尝试以编程方式生成可执行的JAR文件。
我一直在使用该线程（How to use JarOutputStream to create a JAR file?）来生成JAR文件，但到目前为止，它已经包含了我的测试项目的本机.java文件。
现在我想知道，如果只用本机类填充它，是否有可能运行JAR文件 还是我必须（以某种方式）将它们编译成.class文件，然后才能生成JAR文件。
感谢您的帮助！
答案 0 :(得分：0)
Jar存档是具有特殊文件夹结构的zip存档。该结构应具有* .class文件+资源文件。 可选地，源也可以在此存档中，但是不建议这样做（最好为源提供单独的jar文件）。
可执行jar文件是普通jar文件+ Manifest.MF，其中MainClass选项存在，并带有PermissionError Traceback (most recent call last)
~\Documents\Anaconda\anaconda better\lib\site-packages\xlsxwriter\workbook.py in close(self)
315 try:
--> 316 self._store_workbook()
317 except IOError as e:
~\Documents\Anaconda\anaconda better\lib\site-packages\xlsxwriter\workbook.py in _store_workbook(self)
631 except IOError as e:
--> 632 raise e
633
~\Documents\Anaconda\anaconda better\lib\site-packages\xlsxwriter\workbook.py in _store_workbook(self)
628 try:
--> 629 xlsx_file = ZipFile(self.filename, "w", compression=ZIP_DEFLATED,
630 allowZip64=self.allow_zip64)
~\Documents\Anaconda\anaconda better\lib\zipfile.py in __init__(self, file, mode, compression, allowZip64, compresslevel, strict_timestamps)
1249 try:
-> 1250 self.fp = io.open(file, filemode)
1251 except OSError:
PermissionError: [Errno 13] Permission denied: 'C:\\Users\\Donnie\\Desktop\\Python_Practice.xlsx'
During handling of the above exception, another exception occurred:
FileCreateError Traceback (most recent call last)
<ipython-input-218-c060b0b7e2f2> in <module>
15 AAPL=pd.DataFrame(data, columns = ['High','Adj Close'])
16
---> 17 AAPL.to_excel(r'C:\Users\Donnie\Desktop\Python_Practice.xlsx',sheet_name = 'Python',index = False,header = True)
18
19
~\Documents\Anaconda\anaconda better\lib\site-packages\pandas\core\generic.py in to_excel(self, excel_writer, sheet_name, na_rep, float_format, columns, header, index, index_label, startrow, startcol, engine, merge_cells, encoding, inf_rep, verbose, freeze_panes)
2173 inf_rep=inf_rep,
2174 )
-> 2175 formatter.write(
2176 excel_writer,
2177 sheet_name=sheet_name,
~\Documents\Anaconda\anaconda better\lib\site-packages\pandas\io\formats\excel.py in write(self, writer, sheet_name, startrow, startcol, freeze_panes, engine)
736 )
737 if need_save:
--> 738 writer.save()
~\Documents\Anaconda\anaconda better\lib\site-packages\pandas\io\excel\_xlsxwriter.py in save(self)
193 """
194
--> 195 return self.book.close()
196
197 def write_cells(
~\Documents\Anaconda\anaconda better\lib\site-packages\xlsxwriter\workbook.py in close(self)
316 self._store_workbook()
317 except IOError as e:
--> 318 raise FileCreateError(e)
319 except LargeZipFile as e:
320 raise FileSizeError("Filesize would require ZIP64 extensions. "
FileCreateError: [Errno 13] Permission denied: 'C:\\Users\\Donnie\\Desktop\\Python_Practice.xlsx'
方法到主类的完整路径（从jar文件的根目录开始）。