itext字体UnsupportedCharsetException [英] itext font UnsupportedCharsetException

问题描述

我试图在java web应用程序中使用iText（版本5.4.0）创建PDF文档，并且遇到了字体问题。

网页应用程序是多语言的，所以用户可以用各种语言（例如英语，法语，立陶宛语，中文，日语，阿拉伯语等）将信息保存到系统中。

<当我试图配置pdf输出一些日本文本样本没有出现，所以我开始在官方iText在行动书中的例子。我遇到的问题是，当我尝试使用BaseFont.IDENTITY_H编码配置字体时，出现以下错误：

  java .nio.charset.UnsupportedCharsetException：Identity-H 
位于java.nio.charset.Charset.forName（Charset.java:505）
位于com.itextpdf.text.pdf.PdfEncodings.convertToBytes（PdfEncodings。 java：186）
 at com.itextpdf.text.pdf.Type1Font。< init>（Type1Font.java:276）
 at com.itextpdf.text.pdf.BaseFont.createFont（BaseFont.java ：692）
 at com.itextpdf.text.pdf.BaseFont.createFont（BaseFont.java:615）
 at com.itextpdf.text.pdf.BaseFont.createFont（BaseFont.java:450）
  

没有任何内容或搜索Google提到这个问题。

对于我可能错过的任何建议？

解决方案

正如你可能从两个Michaels的答案中理解的那样，你错误的假设了标准的Type 1字体Times Roman和 IDENTITY_H 是兼容的。如果要使用 IDENTITY_H ，则必须更改字体，或者如果要使用标准Type 1字体（在这种情况下使用 BaseFont.EMBEDDED 没有意义，因为标准的Type 1字体永远不会嵌入）。对不起，如果我没有在我的书中提到这一点。我认为这是微不足道的。可以从我写的复合字体中扣除它。

I am trying to create pdf documents using iText (version 5.4.0) in a java web application and I have come across an issue with fonts.

The web application is multi-lingual, and so users may save information into the system in various languages (eg. english, french, lithuanian, chinese, japanese, arabic, etc.).

When I tried to configure the pdf to output some sample japanese text it didn't show up, so I started following the examples in the official "iText in Action" book. The problem I have encountered is that when I try and configure a font with BaseFont.IDENTITY_H encoding I get the following error:

java.nio.charset.UnsupportedCharsetException: Identity-H
    at java.nio.charset.Charset.forName(Charset.java:505)
    at com.itextpdf.text.pdf.PdfEncodings.convertToBytes(PdfEncodings.java:186)
    at com.itextpdf.text.pdf.Type1Font.<init>(Type1Font.java:276)
    at com.itextpdf.text.pdf.BaseFont.createFont(BaseFont.java:692)
    at com.itextpdf.text.pdf.BaseFont.createFont(BaseFont.java:615)
    at com.itextpdf.text.pdf.BaseFont.createFont(BaseFont.java:450)

Nothing in the book or searching Google mentions this issue.

Any suggestions as to what I might have missed?

解决方案

As you probably understood from the answers from two Michaels, you made the wrong assumption that the standard Type 1 font Times Roman and IDENTITY_H are compatible. You'll have to change the font if you want to use IDENTITY_H, or change the encoding if you want to use a standard Type 1 font (in which case using BaseFont.EMBEDDED doesn't make sense because standard Type 1 fonts are never embedded). I'm sorry if I didn't mention this in my book. I thought it was kind of trivial. One can deduct it from what I wrote about composite fonts.

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