Java中怎么通过模板生成PDF

本篇文章为大家展示了Java中怎么通过模板生成PDF，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

1、添加maven依赖

    com.itextpdf    itextpdf    5.5.13.1    org.apache.pdfbox    pdfbox    2.0.16

2.1、通过模板生成PDF文件

package com.hlwl.common.util;import com.itextpdf.text.*;import com.itextpdf.text.pdf.*;import org.apache.commons.lang3.RandomUtils;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Map;/** * PDF工具类 * @class com.hlwl.common.util.PdfUtil.java * @author happyran * @since 2019-09-09 09:09 */public class PdfUtil {    private static SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");    /**     * 根据模板生成PDF     * @param tempPdfPath     * @param data     */    public static void createPdf(String tempPdfPath, Map data){        //填充创建pdf        PdfReader reader = null;        PdfStamper stamp = null;        try {            //创建生成报告名称            if (!new File(tempPdfPath).exists()) {                new File(tempPdfPath).mkdirs();            }            File deskFile = new File(tempPdfPath, sdf.format(new Date()) + RandomUtils.nextInt(1000,9999) + ".pdf");            reader = new PdfReader("D:\\pdfTest\\a.pdf");            stamp = new PdfStamper(reader, new FileOutputStream(deskFile));            // 取出报表模板中的所有字段            AcroFields form = stamp.getAcroFields();            BaseFont bf = BaseFont.createFont("c://windows//fonts//simsun.ttc,1" , BaseFont.IDENTITY_H, BaseFont.EMBEDDED);            form.addSubstitutionFont(bf);            // 填充数据            form.setField("name", data.get("name").toString());            form.setField("sex", data.get("sex").toString());            form.setField("age", data.get("age").toString());            form.setField("generationdate", data.get("generationdate").toString()); //报告生成日期            stamp.setFormFlattening(true);        } catch (Exception e) {            e.printStackTrace();        } finally {            if (stamp != null) {                try {                    stamp.close();                } catch (DocumentException e) {                    e.printStackTrace();                } catch (IOException e) {                    e.printStackTrace();                }            }            if (reader != null) {                reader.close();            }        }    }    // 利用模板生成pdf    public static void pdfout(Map o) {        // 模板路径        String templatePath = "d:/pdfTest/b.pdf";        // 生成的新文件路径        String newPDFPath = "d:/pdfTest/b" + sdf.format(new Date()) + ".pdf";        PdfReader reader;        FileOutputStream out;        ByteArrayOutputStream bos;        PdfStamper stamper;        try {            BaseFont bf = BaseFont.createFont("c://windows//fonts//simsun.ttc,1" , BaseFont.IDENTITY_H, BaseFont.EMBEDDED);            Font FontChinese = new Font(bf, 5, Font.NORMAL);            out = new FileOutputStream(newPDFPath);// 输出流            reader = new PdfReader(templatePath);// 读取pdf模板            bos = new ByteArrayOutputStream();            stamper = new PdfStamper(reader, bos);            AcroFields form = stamper.getAcroFields();            // 文字类的内容处理            Map datemap = (Map)o.get("datemap");            form.addSubstitutionFont(bf);            for(String key : datemap.keySet()){                form.setField(key,datemap.get(key));            }            // 图片类的内容处理            Map imgmap = (Map)o.get("imgmap");            for(String key : imgmap.keySet()) {                int pageNo = form.getFieldPositions(key).get(0).page;                Rectangle signRect = form.getFieldPositions(key).get(0).position;                float x = signRect.getLeft();                float y = signRect.getBottom();                //根据路径读取图片                Image image = Image.getInstance(imgmap.get(key));                //获取图片页面                PdfContentByte under = stamper.getOverContent(pageNo);                //图片大小自适应                image.scaleToFit(signRect.getWidth(), signRect.getHeight());                //添加图片                image.setAbsolutePosition(x, y);                under.addImage(image);            }            stamper.setFormFlattening(true);// 如果为false，生成的PDF文件可以编辑，如果为true，生成的PDF文件不可以编辑            stamper.close();            Document doc = new Document();            Font font = new Font(bf, 32);            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(e);        } catch (DocumentException e) {            System.out.println(e);        }    }    public static void main(String[] args) {        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");        Map data = new HashMap<>();        data.put("name","zhangsan");        data.put("sex","男");        data.put("age","15");        data.put("generationdate",sdf.format(new Date()));        createPdf("D:\\pdfTest\\",data);//        Map map = new HashMap();//        map.put("name","张三");//        map.put("creatdate","2018年1月1日");//        map.put("weather","晴朗");//        map.put("sports","打羽毛球");////        Map map2 = new HashMap();//        map2.put("img","D:\\pdfTest\\1.jpg");////        Map o=new HashMap();//        o.put("datemap",map);//        o.put("imgmap",map2);//        pdfout(o);    }}

2.2、将PDF转为图片

package com.hlwl.common.util;import org.apache.pdfbox.pdmodel.PDDocument;import org.apache.pdfbox.rendering.PDFRenderer;import javax.imageio.ImageIO;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.util.Scanner;/** * PDF转图片工具类 * @class com.hlwl.common.util.Pdf2ImgUtil.java * @author happyran * @since 2019-09-09 09:09 */public class Pdf2ImgUtil {    //可自由确定起始页和终止页    public static void pdf2png(String fileAddress,String filename,int indexOfStart,int indexOfEnd) {        // 将pdf装图片 并且自定义图片得格式大小        File file = new File(fileAddress+"\\"+filename+".pdf");        try {            PDDocument doc = PDDocument.load(file);            PDFRenderer renderer = new PDFRenderer(doc);            int pageCount = doc.getNumberOfPages();            for (int i = indexOfStart; i < indexOfEnd; i++) {                BufferedImage image = renderer.renderImageWithDPI(i, 144); // Windows native DPI                // BufferedImage srcImage = resize(image, 240, 240);//产生缩略图                ImageIO.write(image, "PNG", new File(fileAddress+"\\"+filename+"_"+(i+1)+".png"));            }        } catch (IOException e) {            e.printStackTrace();        }    }    //转换全部的pdf    public static void pdf2png(String fileAddress,String filename) {        // 将pdf装图片 并且自定义图片得格式大小        File file = new File(fileAddress+"\\"+filename+".pdf");        try {            PDDocument doc = PDDocument.load(file);            PDFRenderer renderer = new PDFRenderer(doc);            int pageCount = doc.getNumberOfPages();            for (int i = 0; i < pageCount; i++) {                BufferedImage image = renderer.renderImageWithDPI(i, 144); // Windows native DPI                // BufferedImage srcImage = resize(image, 240, 240);//产生缩略图                ImageIO.write(image, "PNG", new File(fileAddress+"\\"+filename+"_"+(i+1)+".png"));            }        } catch (IOException e) {            e.printStackTrace();        }    }    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        System.out.println("请输入需要转换的pdf的地址，例如 E:\\软件\\代码：");        String fileAddress = sc.nextLine();        System.out.println("请输入需要转换的pdf的名称，不要加.pdf后缀，例如 操作系统概念：");        String filename =sc.nextLine();        System.out.println("请输入开始转换的页码，从0开始，例如 5：");        int indexOfStart=sc.nextInt();        System.out.println("请输入停止转换的页码，-1为全部，例如 10：");        int indexOfEnd=sc.nextInt();        if (indexOfEnd==-1) {            pdf2png(fileAddress, filename);        }        else {            pdf2png(fileAddress, filename, indexOfStart, indexOfEnd);        }    }}

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