How to Display Chinese Characters in PDF Documents Using Apache FOP with SimSun Font?

Apache FOP Chinese Character Display with SimSun

In Apache FOP, displaying complex Chinese characters in a PDF document requires a three-step process to ensure correct font usage and proper glyph rendering.

Step 1: Set Font-Family in FO File

Indicate the desired font family in the FO file using the font-family property. For example, to use the SimSun font:

<code class="xml"><fo:block font-family="SimSun">博洛尼亚大学中国学生的毕业论文</fo:block></code>

Step 2: Configure Font Mapping in FOP's Configuration File

In fop.xconf (located in FOP's 'conf' folder), add font mapping entries under /fop/renderers/renderer[@mime = 'application/pdf']/fonts/:

<code class="xml"><font kerning="yes" embed-url="/path/to/SimSun.ttf">
  <font-triplet name="SimSun" style="normal" weight="normal"/>
</font></code>

Step 3: Instruct FOP to Use Configuration File

Specify the configuration file path when calling FOP from the command line:

$ fop -c /path/to/fop.xconf input.fo input.pdf

Or in Java code:

<code class="java">fopFactory.setUserConfig(new File("/path/to/fop.xconf"));</code>

Once all steps are complete, rerun FOP to generate a PDF document with correct Chinese character display.

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