Itext中文處理pdf(轉)（改）
//註釋：多謝這篇文章給我的啟示，讓我找到了輸出中文的字型改好看的辦法。將我在之前文章中談到的PdfViewSupportAsian中的 smallFont = FontFactory.getFont( "STSongStd-Light" , "UniGB-UCS2-H" , false);改為smallFont = FontFactory.getFont( "STSongStd-Light" , "UniGB-UCS2-H" , false);
Itext中文處理：
在Itext中的中文處理隨著Itext的版本變化，採取的方法也在變化。
首先我來演示一下利用Itext-2.1.3.jar與iTextAsian.jar兩個包來解決中文問題。
附件中有所需要的包：
示例程式碼：
<SPAN style="FONT-SIZE: small">package com.lwf.pdf.test;
import java.awt.Color;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Font;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfWriter;
public class HelloWord {
public static void main(String[] args) {
try {
Document doc = new Document();
PdfWriter.getInstance(doc, new FileOutputStream("c:\\good.pdf"));
doc.open();
BaseFont bfChinese = BaseFont.createFont( "STSongStd-Light" , "UniGB-UCS2-H" , false );
Font fontChinese = new Font(bfChinese , 12 , Font.NORMAL, Color.GREEN);
Paragraph pf = new Paragraph("eee");
pf.add(new Paragraph("我們的家好大的家",fontChinese));
pf.add(new Paragraph("sfsfsf"));
doc.add(pf);
doc.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (DocumentException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
</SPAN>
上面程式碼測試環境是：JDK1.4編譯環境也為1.4，當然在以後的JDK版本中測試也是沒問題的。
好了，現在最新的Itext版本為Itext 5.0,附件中iText.jar即為該版本。以下為Itext5.0的修改：
關注兩句話：
From now on, the iText.jar is compiled using Java 5 (instead of with the JDK 1.4).
The package names have changed from com.lowagie to com.itextpdf.
上面兩句話第一說明itext5.0用於JDK1.5以及之後的版本。第二句更改了包名。
好了，如果我現在的程式使用iText.jar+iTextAsian.jar執行下面程式：
<SPAN style="FONT-SIZE: small">package com.lwf.pdf.test;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Font;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfWriter;
public class HelloWord {
public static void main(String[] args) {
try {
Document doc = new Document();
PdfWriter.getInstance(doc, new FileOutputStream("c:\\good.pdf"));
doc.open();
BaseFont bfChinese = BaseFont.createFont( "STSongStd-Light" , "UniGB-UCS2-H" , false );
//Font fontChinese = new Font(bfChinese,12,Font.NORMAL,Color.GREEN);
Font fontChinese = new Font(bfChinese , 12 , Font.NORMAL, BaseColor.GREEN);
Paragraph pf = new Paragraph("eee");
pf.add(new Paragraph("我們的家好大的家",fontChinese));
pf.add(new Paragraph("sfsfsf"));
doc.add(pf);
doc.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (DocumentException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
</SPAN>
會報以下錯誤：
<SPAN style="FONT-SIZE: small">com.itextpdf.text.DocumentException: No message found for font.1.with.2.is.not.recognized
at com.itextpdf.text.pdf.BaseFont.createFont(Unknown Source)
at com.itextpdf.text.pdf.BaseFont.createFont(Unknown Source)
at com.itextpdf.text.pdf.BaseFont.createFont(Unknown Source)
at com.lwf.pdf.test.HelloWord.main(HelloWord.java:24)
</SPAN>
這是為什麼呢？
不難發現上面兩個測試只是更改了iText包。而iTextAsian.jar只是包含了亞洲國家的文字資訊。開啟iTextAsian.jar發現它採用了與原來iText-2.1.3.jar一樣的包名：com.lowagie.text.Font而現在的iText5.0包名已經改為了com.itextpdf.text.Font，顯然我們更一下包名就可以解決問題。在winrar中把對應包名重新命名加進來即可。我把改好的jar放在附件的更改.rar中。好了，那麼現在使用iText.jar+更改.rar中的iTextAsian.jar測試就不會報錯了。
顯然，它是一個示例。那麼同樣使用iText5.0+更改後的iTextAsian包，下面有另一種實現方法：
/*
* This class is part of the book "iText in Action - 2nd Edition"
* written by Bruno Lowagie (ISBN: 9781935182610)
* For more info, go to: http://itextpdf.com/examples/
* This example only works with the AGPL version of iText.
*/
import java.io.FileOutputStream;
import java.io.IOException;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.FontFactory;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.FontSelector;
import com.itextpdf.text.pdf.PdfWriter;
/**
* This example was written by Bruno Lowagie. It is part of the book 'iText in
* Action' by Manning Publications.
* ISBN: 1932394796
* http://www.1t3xt.com/docs/book.php
* http://www.manning.com/lowagie/
*/
public class FontSelectionExample {
/** The resulting PDF file. */
public static final String RESULT
= "results/part3/chapter11/font_selection.pdf";
/** Some text */
public static final String TEXT
= "These are the protagonists in 'Hero', a movie by Zhang Yimou:\n"
+ "\u7121\u540d (Nameless), \u6b98\u528d (Broken Sword), "
+ "\u98db\u96ea (Flying Snow), \u5982\u6708 (Moon), "
+ "\u79e6\u738b (the King), and \u9577\u7a7a (Sky)." +
"中華人民共和國萬歲勞動人民是光榮的，歲月崢嶸，百舸爭流" ;
/**
* Creates a PDF document.
* @param filename the path to the new PDF document
* @throws DocumentException
* @throws IOException
* @throws DocumentException
* @throws IOException
*/
public void createPdf(String filename) throws IOException, DocumentException {
// step 1
Document document = new Document(PageSize.A4);
// step 2
PdfWriter.getInstance(document, new FileOutputStream(filename));
// step 3: we open the document
document.open();
// step 4:
FontSelector selector = new FontSelector();
selector.addFont(FontFactory.getFont(FontFactory.TIMES_ROMAN, 12));
// selector.addFont(FontFactory.getFont("MSung-Light",
// "UniCNS-UCS2-H", BaseFont.NOT_EMBEDDED));
//
selector.addFont(FontFactory.getFont("STSongStd-Light",
"UniGB-UCS2-H", BaseFont.NOT_EMBEDDED));
Phrase ph = selector.process(TEXT);
document.add(new Paragraph(ph));
// step 5: we close the document
document.close();
}
/**
* Main method.
*
* @param args no arguments needed
* @throws DocumentException
* @throws IOException
*/
public static void main(String[] args) throws IOException, DocumentException {
new FontSelectionExample().createPdf("c:/good.pdf");
}
}
呵呵，我只是把示例程式碼改了一下，那麼在Ｃ盤就會生成一個名為good.pdf的檔案．內容在附件裡．
更改.rar (309.7 KB)下載次數: 143
good.pdf (1.7 KB)下載次數: 58