package me.zhengjie.appapi.util;


import java.io.*;

import org.apache.pdfbox.io.RandomAccessBuffer;
import org.apache.pdfbox.pdfparser.PDFParser;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.text.PDFTextStripper;

public class PdfUtils {


    public String readPdf(String fileName) {

        File file = new File(fileName);
        FileInputStream in = null;
        String content = null;
        try {
            in = new FileInputStream(fileName);
            PDFParser parser = new PDFParser(new RandomAccessBuffer(in)); // 新建一个PDF解析器对象
            parser.parse();  // 对PDF文件进行解析
            PDDocument pdfdocument = parser.getPDDocument();  // 获取解析后得到的PDF文档对象
            PDFTextStripper stripper = new PDFTextStripper(); // 新建一个PDF文本剥离器
            content = stripper.getText(pdfdocument);  // 从PDF文档对象中剥离文本

        } catch (Exception e) {
            System.out.println("读取PDF文件" + file.getAbsolutePath() + "生失败！" + e);
            e.printStackTrace();
        }
        return content;
    }

    public String createPDF (String fileName, String content) throws IOException{

        PDDocument document = new PDDocument();
        PDPage page = new PDPage();
        document.addPage(page);
        PDFont font = PDType1Font.HELVETICA;

        PDPageContentStream contentStream = new PDPageContentStream(document, page);
        contentStream.beginText();
        contentStream.setFont(font, 14);
        contentStream.moveTextPositionByAmount(100, 700);
        contentStream.drawString(content);

        contentStream.endText();
        contentStream.close();

        try {
            document.save(fileName);
        } catch (Exception e) {
            e.printStackTrace();
        }
        document.close();
        return "";
    }
}