itext基本编辑单元

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font
		font.setColor(new Color(0x92, 0x90, 0x83));
		
		Chunk chunk = 
			new Chunk("testing text element", font); // 初始化Chunk
		
		chunk.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	paragraph	
		document.add(paragraph); //添加	paragraph
		
		document.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