1.pdf模板我這邊用的是福昕高階PDF編輯器(臨時使用14天)直接生成，通過工具的編輯表單新增文字域

2.pdf模板生成後，接著就是程式碼部分了：

(1)新增jar

	        <dependency>
			<groupId>com.itextpdf</groupId>
			<artifactId>itextpdf</artifactId>
			<version>5.5.1</version>
		</dependency>
		<dependency>
			<groupId>com.itextpdf</groupId>
			<artifactId>itext-asian</artifactId>
			<version>5.2.0</version>
		</dependency>
 

 （2）程式碼部分

import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;


public class test1 {
    public static  void main(String[] args) {
        //模板路徑
        String templatePath = "E:/pdf/pdf.pdf";
        //生成的新檔案路徑
        String newPDFPath = "E:/pdf/ss1.pdf";
        PdfReader reader;
        FileOutputStream out;
        ByteArrayOutputStream bos;
        PdfStamper stamper;
        try {
            out = new FileOutputStream(newPDFPath);//輸出流
            reader = new PdfReader(templatePath);//讀取pdf模板
            bos = new ByteArrayOutputStream();
            stamper = new PdfStamper(reader, bos);
            AcroFields form = stamper.getAcroFields();
            java.util.Iterator<String> it = form.getFields().keySet().iterator();
            while (it.hasNext()) {
                String name = it.next().toString();
                //填寫內容部分
                form.setField(name, "2465465145648456");
               //
            }
            stamper.setFormFlattening(true);//如果為false那麼生成的PDF檔案還能編輯，一定要設為true
            stamper.close();

            Document doc = new Document();
            PdfCopy copy = new PdfCopy(doc, out);
            doc.open();
            PdfImportedPage importPage = copy.getImportedPage(
                    new PdfReader(bos.toByteArray()), 1);
            copy.addPage(importPage);
            doc.close();

        } catch (IOException e) {
            System.out.println(1);
        } catch (DocumentException e) {
            System.out.println(2);
        }
    }

}