pdf文档的下载

1.若pdf中需动态填入的内容为已定义的Filed,则可用如下方法: 

 field.setField("address_a", "jlTest");中的address_a即是pdf模板中已定义的Field

 

import java.io.FileOutputStream;
import java.io.IOException;

import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.AcroFields;
import com.lowagie.text.pdf.PdfStamper;

public class WriteInPdf ...{
    public static void main(String[] args)...{
        try ...{
            PdfReader pdfr = new PdfReader("D:/jltestFile/contract-sp2ad.pdf");
            PdfStamper stamper = new PdfStamper(pdfr,new FileOutputStream("D:/jltestFile/contract-sp2adu.pdf"));
            AcroFields field = stamper.getAcroFields();
            field.setField("address_a", "jlTest");
            //stamper.setFormFlattening(true);
            stamper.close();
            
            //web程序中直接发送到浏览器
//            PdfReader reader = new PdfReader(template);
//            PdfStamper stamp = new PdfStamper(reader, response
//                    .getOutputStream());
//            stamp.setFormFlattening(true);
//            stamp.close();
        } catch (IOException e) ...{
            e.printStackTrace();
        } catch (DocumentException e) ...{
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
}

 

2.若pdf中没有定义Field,只是为需动态填入内容的地方预留了空格,则需计算其坐标,再插入

 

import java.io.FileOutputStream;
import java.io.IOException;

import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.BaseFont;

public class WriteInPdfNoText ...{
    public static void main(String[] args) ...{
     try ...{
        PdfReader pdfr = new PdfReader("D:/jltestFile/compnotify.pdf");
        Rectangle rec = pdfr.getPageSizeWithRotation(1);
        Document doc = new Document(rec);
        //读入的pdf的总页数
        int n = pdfr.getNumberOfPages();
        PdfWriter pdfw = PdfWriter.getInstance(doc, new FileOutputStream("D:/jltestFile/notify.pdf"));

//web中

//ByteArrayOutputStream baos = new ByteArrayOutputStream();

//PdfWriter pdfw = PdfWriter.getInstance(doc, baos );
        doc.open();
        PdfContentByte pcb = pdfw.getDirectContent();
        int i = 0;
        while(i<n)...{
            doc.newPage();
            i++;
            //读取当前页
            PdfImportedPage pip = pdfw.getImportedPage(pdfr, i);
            pcb.addTemplate(pip, 0, 0);
            BaseFont font = BaseFont.createFont("HeiseiMin-W3", "UniJIS-UCS2-HW-H",
                    BaseFont.NOT_EMBEDDED);
            pcb.beginText();
            pcb.setFontAndSize(font, 12);
            //分别处理pdf中各页中需要填充的位置
            if(i == 1)...{
                pcb.showTextAligned(PdfContentByte.ALIGN_RIGHT, "20", 440, 773, 0);
            }
            if(i == 2)...{
                pcb.showTextAligned(PdfContentByte.ALIGN_LEFT, "13245678910", 270, 90, 0);
            }
            pcb.endText();
        }
        doc.close();
        pdfw.close();

 //web中

  //doc.close();
  //baos.writeTo(response.getOutputStream());
  //baos.close();
    } catch (IOException e) ...{
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (DocumentException e) ...{
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    }        
}