IText operation PDF basics-2

UML element class diagram:

 

Chunk & Phase
Chunk
The smallest element (a string consisting of fonts, colors, and styles of the same type ). Font attributes are defined by Font objects.

The chunk element is not directly added. Instead, the chunk is used to form other large elements and then added to the document.

However, Chunk. NEWLINE is directly added to the document.

LEADING
Text spacing. The Chunk object does not contain the text spacing settings.

1
Using writer. getInstance (document, new FileOutputStream (RESULT). setInitialLeading (16 );
PHRASE
It consists of a series of chunk objects with the leading attribute.

Basic example:

01
Public static void main (String [] args) throws disable entexception,
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IOException {
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Document document = new Document (); // create a Document
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Response writer. getInstance (document, new FileOutputStream ("D:/demo.pdf"); // gets the response writer instance
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Document. open (); // open the document
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Phrase phase = new Phrase ();
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Phase. add (new Chunk ("first line "));
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Phase. add (Chunk. NEWLINE); // line feed
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Phase. add (new Chunk ("second Line "));
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Document. add (phase );
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Document. close (); // close the document
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}
Result:

 

Paragraph
There are a series of phrase and some additional attributes with a line feed identifier.

Code:

01
Public static void main (String [] args) throws FileNotFoundException,
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DocumentException {
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Document document = new Document (); // create a Document
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Response writer. getInstance (document, new FileOutputStream ("D:/demo.pdf"); // gets the response writer instance
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Document. open (); // open the document
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Paragraph para = new Paragraph ();
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Para. add (new Chunk ("first chunk "));
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Para. add (new Chunk (", second chunk "));
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Para. setAlignment (Element. ALIGN_RIGHT); // right alignment
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Document. add (para );
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// Pharagraph carries a line feed identifier
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Paragraph paraL = new Paragraph ();
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ParaL. add (new Chunk ("2: first chunk "));
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ParaL. add (new Chunk (", second chunk "));
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ParaL. setAlignment (Element. ALIGN_LEFT); // left alignment
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Document. add (paraL );
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Paragraph paraR = new Paragraph ();
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ParaR. add (new Chunk ("3: first chunk "));
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ParaR. add (new Chunk (", second chunk "));
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ParaR. setAlignment (Element. ALIGN_LEFT); // left alignment
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ParaR. setLeading (30f); // you can specify the distance from the preceding paragraph.
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Document. add (paraR );
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Document. close (); // close the document
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}

List
A series of Paragraph Components

Code:

01
Public static void main (String [] args) throws FileNotFoundException,
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DocumentException {
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Document document = new Document (); // create a Document
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Response writer. getInstance (document, new FileOutputStream ("D:/demo.pdf"); // gets the response writer instance
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Document. open (); // open the document
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List pList = new List ();
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ListItem li = new ListItem ();
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For (int I = 0; I <3; I ++ ){
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Paragraph p = new Paragraph ();
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P. add (new Chunk ("item:" + I ));
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Li. add (p );
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}
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PList. setNumbered (true );
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PList. add (li );
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Document. add (pList );
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Document. add (Chunk. NEWLINE );
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List pList2 = new List ();
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ListItem li2 = new ListItem ();
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For (int I = 0; I <3; I ++ ){
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Li2.add (new Chunk ("mainItem:" + I ));
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For (int j = 0; j <3; j ++ ){
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List pList3 = new List ();
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ListItem li3 = new ListItem ();
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Paragraph p = new Paragraph ();
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P. add (new Chunk ("subItem:" + j ));
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Li3.add (p );
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PList3.add (li3 );
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PList3.setIndentationLeft (10f );
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Li2.add (pList3 );
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}
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}
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PList2.add (li2 );
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Document. add (pList2 );
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Document. close (); // close the document
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}