该方法返回一个可以在以后保存到输出文件的字节数组；取决于请求的格式，输出文件可以是图形文件或Excel电子表格。

This method returns a byte array which you can then save to an output file, such as an image file or an Excel spreadsheet, depending on the requested format.

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将字节数组写入压缩输出流。

Writes an array of bytes to the compressed output stream.

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将指定b.length长度的字节数组写入输出流。

Writes b. length bytes from the specified byte array to this output stream.

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将字节数组写入压缩输出流。

Writes array of bytes to the compressed output stream.

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转换输入字节数组的指定区域，并将所得到的转换复制到输出字节数组的指定区域。

Transforms the specified region of the input byte array and copies the resulting transform to the specified region of the output byte array.

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转换输入字节数组的指定区域，并将所得到的转换复制到输出字节数组的指定区域。

Transforms the specified region of the input byte array and copies the resulting transform to the specified region of the output byte array.

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