Java实现将TXT文本文件转换为PDF文件

import com.spire.pdf.FileFormat;
import com.spire.pdf.PdfDocument;
import com.spire.pdf.PdfPageBase;
import com.spire.pdf.graphics.*;
 
import java.awt.*;
import java.awt.geom.Rectangle2D;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
 
public class ConvertTextToPdf {
    public static void main(String[] args) throws Exception {
        //从TXT文件读取文本
        String text = readTextFromFile("C:\\Users\\Administrator\\Desktop\\文本.txt");
 
        //创建PdfDocument类的对象
        PdfDocument pdf = new PdfDocument();
        //添加一个页面
        PdfPageBase page = pdf.getPages().add();
 
        //创建PdfFont类的对象
        Font font = new Font("宋体", Font.PLAIN, 11);
        PdfTrueTypeFont font1 = new PdfTrueTypeFont(font);
 
        //创建PdfTextLayout类的对象
        PdfTextLayout textLayout = new PdfTextLayout();
        textLayout.setBreak(PdfLayoutBreakType.Fit_Page);
        textLayout.setLayout(PdfLayoutType.Paginate);
 
        //创建PdfStringFormat类的对象
        PdfStringFormat format = new PdfStringFormat();
        format.setLineSpacing(20f);
 
        //用读取的文本创建PdfTextWidget类的对象
        PdfTextWidget textWidget = new PdfTextWidget(text, font1, PdfBrushes.getBlack());
        //设置字符格式
        textWidget.setStringFormat(format);
 
        //将文本添加到PDF页面的指定位置
        Rectangle2D.Float bounds = new Rectangle2D.Float();
        bounds.setRect(0,25,page.getCanvas().getClientSize().getWidth(),page.getCanvas().getClientSize().getHeight());
        textWidget.draw(page, bounds, textLayout);
 
        //保存结果文件
        pdf.saveToFile("TXT转PDF.pdf", FileFormat.PDF);
    }
    public static String readTextFromFile(String fileName) throws IOException {
        StringBuffer sb = new StringBuffer();
        BufferedReader br = new BufferedReader(new FileReader(fileName));
        String content = null;
        while ((content = br.readLine()) != null) {
            sb.append(content);
            sb.append("\n");
        }
        return sb.toString();
    }
}

  	<dependency>
        <groupId>org.xhtmlrenderer</groupId>
        <artifactId>flying-saucer-pdf</artifactId>
        <version>9.1.2</version>
    </dependency>
    <dependency>
        <groupId>cn.lesper</groupId>
        <artifactId>iTextAsian</artifactId>
        <version>2.0</version>
    </dependency>    

package yll2023;
 
import java.io.FileOutputStream;
import java.io.IOException;
 
import com.lowagie.text.*;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfWriter;
 
/**
 * 将文本内容转成pdf
 * @author y
 *
 */
public class ObjectToPdf {
    
    public void strToPdf() throws DocumentException, IOException {
        Document document = new Document();
        PdfWriter.getInstance(document,new FileOutputStream("E:\\a\\test.pdf"));
        BaseFont bfChinese = BaseFont.createFont("STSong-Light","UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);
        Font font = new Font(bfChinese,12,Font.NORMAL);
        // 设置标题
        Paragraph pHeader = new Paragraph("line",font);
        // 设置标题居中
        pHeader.setAlignment(Element.ALIGN_CENTER);
        
        // 设置正文
        Paragraph ph = new Paragraph("content",font);
        document.open();
        document.add(pHeader);
        document.add(ph);
        document.close();
    }
}

import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;

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

public class TextToPdfConverter {

    public static void main(String[] args) {
        String text = "Hello, World! This is a sample text.";

        try {
            PdfDocument pdfDocument = new PdfDocument(new PdfWriter(new FileOutputStream("output.pdf")));
            Document document = new Document(pdfDocument);

            Paragraph paragraph = new Paragraph(text);
            document.add(paragraph);

            document.close();
            System.out.println("PDF created successfully.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}