Java使用iText生成PDF的步骤和示例

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13.2</version>
</dependency>

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

public class SimplePDFExample {
    public static void main(String[] args) {
        Document document = new Document();
        try {
            PdfWriter.getInstance(document, new FileOutputStream("simple.pdf"));
            document.open();
            document.add(new Paragraph("Hello, iText! This is a simple PDF document."));
            document.close();
        } catch (DocumentException | FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}

document.add(new Paragraph("Document Title", new Font(Font.FontFamily.TIMES_ROMAN, 18, Font.BOLD)));

List list = new List(List.UNORDERED);
list.add(new ListItem("Item 1"));
list.add(new ListItem("Item 2"));
document.add(list);

PdfPTable table = new PdfPTable(3); // 3列的表格
table.addCell("Column 1");
table.addCell("Column 2");
table.addCell("Column 3");
document.add(table);

Rectangle pageSize = new Rectangle(PageSize.A4);
pageSize.setBackgroundColor(BaseColor.WHITE);
document.setPageSize(pageSize);
document.setMargins(36, 36, 36, 36);

try {
    Image image = Image.getInstance("image.jpg");
    image.scaleToFit(200, 200); // 调整图像大小
    document.add(image);
} catch (BadElementException | IOException e) {
    e.printStackTrace();
}