itext基本编辑单元

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在itext的com.lowagie.text包中有Chunk，Phrase，Paragraph这三种text编辑单元

其中Chunk是最小的单元

也就是说Paragraph可以包含多个Phrase，Phrase可以包含多个Chunk

下面是Chunk的例子

public class Chunk_Example {public Chunk_Example() throws Exception{Document document = new Document();PdfWriter.getInstance(document, new FileOutputStream("chunk_example.pdf"));document.open();Font font = new Font(Font.COURIER, 10, Font.BOLD); // 设置fontfont.setColor(new Color(0x92, 0x90, 0x83));Chunk chunk = new Chunk("testing text element", font); // 初始化Chunkchunk.setBackground(new Color(0xff, 0xe4, 0x00)); // 设置背景document.add(chunk); // 添加chunk到文档document.close();}public static void main(String[] args) {try{Chunk_Example textExample = new Chunk_Example();}catch(Exception e){System.out.println(e);}}}

我们一般不使用Chunk生成文本，因为Chunk不能自动换行，而是使用Phrase代替

public class Phrase_Example {public Phrase_Example() throws Exception{Document document = new Document();PdfWriter.getInstance(document, new FileOutputStream("phrase_example.pdf"));document.open();Font font = new Font(Font.COURIER, 10, Font.BOLD);font.setColor(new Color(0x92, 0x90, 0x83));Chunk chunk = new Chunk("testing text element ", font);chunk.setBackground(new Color(0xff, 0xe4, 0x00));Phrase phrase = new Phrase(20, "This is initial text. "); //初始化Phrase，有20像素的间距for(int i=0; i < 10; i++){phrase.add(chunk); // 添加110个Chunk到Phrase}document.add(phrase); document.close();}public static void main(String[] args) {try{Phrase_Example textExample = new Phrase_Example();}catch(Exception e){System.out.println(e);}}}

Phrase已经满足大部分需求，但是如果我们想要一个分成几段来显示文本，可以使用
phrase.add("\n");
也可以通过Paragraph来实现

public class Paragraph_Example {public Paragraph_Example() throws Exception{Document document = new Document();PdfWriter.getInstance(document, new FileOutputStream("paragraph_example.pdf"));document.open();Font font = new Font(Font.COURIER, 10, Font.BOLD);font.setColor(new Color(0x92, 0x90, 0x83));Chunk chunk = new Chunk("testing text element ", font);chunk.setBackground(new Color(0xff, 0xe4, 0x00));Phrase phrase = new Phrase(20, "This is initial text. "); for(int i=0; i < 10; i++){phrase.add(chunk); }Paragraph paragraph = new Paragraph(); paragraph.add(phrase);//添加phrase对象document.add(paragraph); //添加paragraphdocument.add(paragraph); //添加paragraphdocument.close();}public static void main(String[] args) {try{Paragraph_Example textExample = new Paragraph_Example();}catch(Exception e){System.out.println(e);}}}

引用

http://www.geek-tutorials.com/java/itext/insert_control_text.php

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