在记事本输入以下内容，保存demo.pdf,即可完成一个纯手工生成的PDF文件，PDF基础结构清晰可见。
也可以直接下载 https://github.com/shixingya/PDF-
%PDF-1.4
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<<
/Type /Pages
/Kids [2 0 R]
/Count 1
>>
endobj
2 0 obj
<<
/Type /Page
/Parent 1 0 R
/MediaBox [0 0 612 792]
/Contents 4 0 R
/Resources
<<
/Font
<>
/XObject
<>
>>
>>
endobj
3 0 obj
<<
/Type /Catalog
/Pages 1 0 R
>>
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<<
/Length 0
>>stream
1 0 0 RG
0 792 m
612 0 l
s
BT
/Font1 10 Tf
100 700 TD
(Hello World!) Tj
ET
q
100 0 0 100 300 600 cm
/Image1 Do
Q
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endobj
5 0 obj
<<
/Type /Font
/Subtype /Type1
/BaseFont /Helvetica
>>
endobj
6 0 obj<<
/Type /XObject
/Subtype /Image
/Width 8
/Height 8
/ColorSpace /DeviceRGB
/BitsPerComponent 8
/Length 0
/Filter /ASCIIHexDecode
>> stream
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xref
trailer
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startxref
%%EOF
