How to print `Non-breaking space` to a pdf using apache pdf box?

问题

final String NBSP = new String("\u00a0");
contentStream.showText("Konichua!" + NBSP);

this throws the following exception:

java.lang.IllegalArgumentException: U+00A0 ('nbspace') is not available in this font Courier encoding: WinAnsiEncoding

I have tried it with all the 3 fonts available; TimesNewRoman, Courier & Helvitica with all 3 resulting in the same exception.

But when you look at the WIN_ANSI_ENCODING_TABLE present in the source code of apcahe pdfBox,

    {040, "space"},
    {0243, "sterling"},
     .
     .

    // adding some additional mappings as defined in Appendix D of the pdf spec
    {0240, "space"},
    {0255, "hyphen"}

we can see that the below Non-breaking space is defined.

DEC     OCT     HEX     BIN       Symbol     Description

160    240      A0      10100000              Non-breaking space

In the pdf specification document the following is quoted too:

The SPACE character shall also be encoded as 312 in MacRomanEncoding and as 240 in WinAnsiEncoding . This duplicate code shall signify a nonbreaking space; it shall be typographically the same as (U+003A) SPACE.

Use case:

To increase the width of header txt columns by adding padding with NBSP, so that it is not removed when string.trim() is called on header columns.

回答1:

"it shall be typographically the same as (U+003A) SPACE".

So it doesn't have the nbsp / nbspace. Get your font by calling PDType0Font.load(document, new File("...")).

Btw, calling new String() on a string is not a good idea.

来源：https://stackoverflow.com/questions/47944235/how-to-print-non-breaking-space-to-a-pdf-using-apache-pdf-box

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java

pdfbox