MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;

import com.lowagie.text.Document;
import com.lowagie.text.PageSize;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.AcroFields;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.GrayColor;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfStamper;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.RandomAccessFileOrArray;
import com.lowagie.text.pdf.TextField;

public class MainClass {
    public static void main(String[] args) throws Exception {
        createPdf("HelloLetter.pdf", "field", "value");
        RandomAccessFileOrArray letter = new RandomAccessFileOrArray("HelloLetter.pdf");
        PdfReader reader = new PdfReader(letter, null);
        ByteArrayOutputStream baos1 = new ByteArrayOutputStream();
        PdfStamper stamper = new PdfStamper(reader, baos1);
        AcroFields form = stamper.getAcroFields();
        form.renameField("field", "field1");
        stamper.close();
        reader = new PdfReader(letter, null);
        ByteArrayOutputStream baos2 = new ByteArrayOutputStream();
        stamper = new PdfStamper(reader, baos2);
        form = stamper.getAcroFields();
        form.renameField("field", "field2");
        stamper.close();

    }

    private static void createPdf(String filename, String field, String value) throws Exception {
        Document document = new Document(PageSize.A4);
        PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(filename));
        document.open();
        BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);

        TextField tf = new TextField(writer, new Rectangle(64, 785, 340, 800), field);
        tf.setFontSize(12);
        tf.setFont(bf);
        tf.setText(value);
        tf.setTextColor(new GrayColor(0.5f));
        writer.addAnnotation(tf.getTextField());

        document.close();
    }
}