Java在已存在的pdf文件中生成文字和图片--基础

package com.core.pdf;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import com.itextpdf.text.BaseColor;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;

public class Test {
    
    public static void main(String[] args) throws DocumentException, IOException {
        BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);
        InputStream input = new FileInputStream(new File("E:/pdf_test/test.pdf"));
        PdfReader reader = new PdfReader(input);
        OutputStream output = new FileOutputStream(new File("E:/pdf_test/test1.pdf"));
        PdfStamper stamper = new PdfStamper(reader, output);
        PdfContentByte page = stamper.getOverContent(1);

        //将文字贴入pdf
        page.beginText();
        page.setFontAndSize(baseFont,12);
        BaseColor coler = new BaseColor(0, 0, 0);
        page.setColorFill(coler);
        page.setTextMatrix(100,500); //设置文字在页面中的坐标
        page.showText("添加文字信息");
        page.endText();
        
        
        //将图片贴入pdf
        Image image = Image.getInstance("E:/pdf_test/8.png");
        image.setAbsolutePosition(100,200); //设置图片在页面中的坐标
        page.addImage(image);
        
        stamper.close();
        reader.close();
        input.close();
    }

}