Here are good starting points:
http://pd4ml.com/reference.htm#7.1
http://pd4ml.com/cookbook/pd4ml_pdf_true_type_fonts.htm

i have problem with arabic i used

<pd4ml:transform screenWidth="400"
pageFormat="A5"
pageOrientation="landscape"
debug="true"
pageInsets="100,100,100,100,points" >

<pd4ml:usettf from="java:fonts" serif="Times New Roman" sansserif="Arial" monospace="Courier New"/>

<pd4ml:usettf from="C:/fonts"/>

</pd4ml:transform>

but the arabic appear with ???? why can any one help me

You defined debug="true" attribute. That means PD4ML prints to server's log TTF loading diagnostics.

Can it lookup requested fonts? Can it load them? The log output should help to determine the problem reason.

13/09/13 04:19:59 version: PD4ML 381fx1 Pro DMS
13/09/13 04:19:59 loading CSS file file:/dp/jsps/css_ar/reset.css
13/09/13 04:19:59 not yet in cache: file:/dp/jsps/css_ar/reset.css
13/09/13 04:19:59 Loading via HTTP Request dispatcher: /dp/jsps/css_ar/reset.css
13/09/13 04:19:59 Using URL without web application name: /jsps/css_ar/reset.css
13/09/13 04:19:59 RequestDispatcher.include() returned 6721 bytes: html, body, div, span, applet, object, i
13/09/13 04:19:59 loading CSS file file:/dp/jsps/css_ar/template.css?<?=time()?>
13/09/13 04:19:59 not yet in cache: file:/dp/jsps/css_ar/template.css?<?=time()?>
13/09/13 04:19:59 Loading via HTTP Request dispatcher: /dp/jsps/css_ar/template.css?<?=time()?>
13/09/13 04:19:59 Using URL without web application name: /jsps/css_ar/template.css?<?=time()?>
13/09/13 04:19:59 RequestDispatcher.include() returned 62208 bytes: body {
text-align: center;
mar
13/09/13 04:19:59 loading CSS file file:/dp/jsps/css_ar/black.css
13/09/13 04:19:59 not yet in cache: file:/dp/jsps/css_ar/black.css
13/09/13 04:19:59 Loading via HTTP Request dispatcher: /dp/jsps/css_ar/black.css
13/09/13 04:19:59 Using URL without web application name: /jsps/css_ar/black.css
13/09/13 04:19:59 RequestDispatcher.include() returned 3364 bytes: body.black #outer_wrapper {
backgro
13/09/13 04:19:59 loading CSS file file:/dp/jsps/css_ar/calender.css
13/09/13 04:19:59 not yet in cache: file:/dp/jsps/css_ar/calender.css
13/09/13 04:19:59 Loading via HTTP Request dispatcher: /dp/jsps/css_ar/calender.css
13/09/13 04:19:59 Using URL without web application name: /jsps/css_ar/calender.css
13/09/13 04:19:59 RequestDispatcher.include() returned 1908 bytes: .calender {
width: 220px;
/*he
13/09/13 04:19:59 loading CSS file file:/dp/jsps/css_ar/ui.selectmenu.css
13/09/13 04:19:59 not yet in cache: file:/dp/jsps/css_ar/ui.selectmenu.css
13/09/13 04:19:59 Loading via HTTP Request dispatcher: /dp/jsps/css_ar/ui.selectmenu.css
13/09/13 04:19:59 Using URL without web application name: /jsps/css_ar/ui.selectmenu.css
13/09/13 04:19:59 RequestDispatcher.include() returned 2008 bytes: /* Selectmenu
-------------------------
13/09/13 04:19:59 loading CSS file file:/dp/jsps/css_ar/jquery-ui-1.8.6.custom.css
13/09/13 04:19:59 not yet in cache: file:/dp/jsps/css_ar/jquery-ui-1.8.6.custom.css
13/09/13 04:19:59 Loading via HTTP Request dispatcher: /dp/jsps/css_ar/jquery-ui-1.8.6.custom.css
13/09/13 04:19:59 Using URL without web application name: /jsps/css_ar/jquery-ui-1.8.6.custom.css
13/09/13 04:19:59 RequestDispatcher.include() returned 18640 bytes: .ui-helper-hidden { display: none; }
.u
13/09/13 04:19:59 loading CSS file file:/dp/jsps/css_ar/datePicker.css
13/09/13 04:19:59 not yet in cache: file:/dp/jsps/css_ar/datePicker.css
13/09/13 04:19:59 Loading via HTTP Request dispatcher: /dp/jsps/css_ar/datePicker.css
13/09/13 04:19:59 Using URL without web application name: /jsps/css_ar/datePicker.css
13/09/13 04:19:59 RequestDispatcher.include() returned 2724 bytes:

table.jCalendar {
border: 1px soli
13/09/13 04:19:59 loading CSS file file:/dp/jsps/css_ar/jquery.autocomplete.css
13/09/13 04:19:59 not yet in cache: file:/dp/jsps/css_ar/jquery.autocomplete.css
13/09/13 04:19:59 Loading via HTTP Request dispatcher: /dp/jsps/css_ar/jquery.autocomplete.css
13/09/13 04:19:59 Using URL without web application name: /jsps/css_ar/jquery.autocomplete.css
13/09/13 04:19:59 RequestDispatcher.include() returned 858 bytes: .ac_results {
padding: 0px;
border:
13/09/13 04:19:59 loading CSS file file:/dp/jsps/css_ar/jquery.autocomplete.css
13/09/13 04:19:59 not yet in cache: file:/dp/jsps/css_ar/jquery.autocomplete.css
13/09/13 04:19:59 Loading via HTTP Request dispatcher: /dp/jsps/css_ar/jquery.autocomplete.css
13/09/13 04:19:59 Using URL without web application name: /jsps/css_ar/jquery.autocomplete.css
13/09/13 04:19:59 RequestDispatcher.include() returned 858 bytes: .ac_results {
padding: 0px;
border:
13/09/13 04:19:59 looping inclusions found: file:/dp/jsps/css_ar/jquery.autocomplete.css
13/09/13 04:19:59 loading CSS file file:/dp/jsps/css_ar/keyboard.css
13/09/13 04:19:59 not yet in cache: file:/dp/jsps/css_ar/keyboard.css
13/09/13 04:19:59 Loading via HTTP Request dispatcher: /dp/jsps/css_ar/keyboard.css
13/09/13 04:19:59 Using URL without web application name: /jsps/css_ar/keyboard.css
13/09/13 04:19:59 RequestDispatcher.include() returned 7223 bytes: #keyboardInputMaster {
position:absol
13/09/13 04:20:00 image not yet in cache: file:D:/isoft/projects/DPINT/src/web-online/public_html/
13/09/13 04:20:00 image size: 7242
13/09/13 04:20:00 image size: 7242
13/09/13 04:20:00 image type of file:D:/isoft/projects/DPINT/src/web-online/public_html/ is unknown/unsupported.
13/09/13 04:20:00 can not load image: ../
13/09/13 04:20:00 image not yet in cache: file:D:/isoft/projects/DPINT/src/web-online/public_html/Images/Button_default_hover.gif
13/09/13 04:20:00 image file:D:/isoft/projects/DPINT/src/web-online/public_html/Images/Button_default_hover.gif has zero length.
13/09/13 04:20:00 can not load image: file:D:/isoft/projects/DPINT/src/web-online/public_html/Images/Button_default_hover.gif
13/09/13 04:20:00 done in 1072ms.

Note:
i used this JAR with 3 fonts for serif, sansserif and monospaced types
http://pd4ml.com/i/easyfonts/fonts.jar (~2MB)

in webinf/lib

Try to change <pd4ml:usettf> tag to
<pd4ml:usettf from="java:fonts"/>

i tried this tag but still the problem exist and the Arabic character appear as ?????

Please publish your updated JSP and a sample of its debug output.

Any solution to display arabic text. I am facing the same problem. The characters are coming as ????. Although in my case the data I am passing through the StringReader as I am receiving the data from a WebService.