如何使用iText创建表格，使所有列的宽度与内容无关？

Document document = new Document();

PdfPTable table = new PdfPTable(3);

table.setTotalWidth(500);
table.setLockedWidth(true);

PdfPCell cell = new PdfPCell(new Phrase("内容"));
table.addCell(cell);

document.add(table);

document.close();

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import com.itextpdf.text.pdf.PdfWriter;

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

public class CreateTableWithFixedWidth {
    public static void main(String[] args) {
        Document document = new Document();
        try {
            PdfWriter.getInstance(document, new FileOutputStream("table.pdf"));
            document.open();

            PdfPTable table = new PdfPTable(3);
            table.setTotalWidth(500);
            table.setLockedWidth(true);

            PdfPCell cell1 = new PdfPCell(new Phrase("内容1"));
            PdfPCell cell2 = new PdfPCell(new Phrase("内容2"));
            PdfPCell cell3 = new PdfPCell(new Phrase("内容3"));

            table.addCell(cell1);
            table.addCell(cell2);
            table.addCell(cell3);

            document.add(table);
            document.close();

            System.out.println("表格已创建并保存为table.pdf");
        } catch (DocumentException | FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}