Java itext 7表格边界问题

当前版本的itext 7在呈现表格中某些单元格跨越几行的单元格边框时遇到问题

呈现边框的正确方式（通过文档，如下所示）会导致空指针异常

.setBorder(Border.NO_BORDER)
.setBorderTop(new SolidBorder(1f))

直观的方式（如下所示）不忽略任何边界请求，只渲染所有边界

这只会发生在第一行，最后一个右边的单元格（在我的例子中标记为“1.4”）。 除此之外，我发现iText7是一个令人惊叹的产品，也是伟大软件工程的一个例子。谢谢

下面是说明这两种情况的完整源代码：

import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.border.Border;
import com.itextpdf.layout.border.SolidBorder;
import com.itextpdf.layout.element.Cell;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Table;
import com.itextpdf.layout.property.VerticalAlignment;
import java.io.File;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;


public class TableBorderTest {

public static final String OUTPUT_FOLDER = "./target/test/";

@BeforeClass
public static void beforeClass() {
    new File(OUTPUT_FOLDER).mkdirs();
}

@AfterClass
public static void tearDownClass() throws Exception {
}

/**
 * Test of generate method, of class SummaryResultsVsAll.
 * @throws java.lang.Exception
 */
@Test
public void testGenerate1() throws Exception {
    System.out.println("generate");

    String outPdf = OUTPUT_FOLDER + "TableBorderTest.pdf";
    PdfWriter writer = new PdfWriter(outPdf);
    PdfDocument pdfDocument;
    pdfDocument = new PdfDocument(writer);
    Document document = new Document(pdfDocument);

    Table table = new Table(new float[]{10f, 10f, 20.0F, 70.0F});
    table.setWidthPercent(100)
            .setPadding(0)
            .setFontSize(9);

    Cell aCell = new Cell(7, 1);
    aCell.add("1.1").setBorder(Border.NO_BORDER).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f));

    table.addCell(aCell);

    //create row
    Cell bCell = new Cell(3, 1);
    Paragraph paragraph = new Paragraph("1.2");
    paragraph.setBold();
    bCell.add(paragraph);
    bCell.setBorder(Border.NO_BORDER).setBorderTop(new SolidBorder(1f));
    table.addCell(bCell);

    //row
    paragraph = new Paragraph("1.3").setFontSize(7).setPaddingTop(10);
    Cell someCell = createTableCellNoBorder();
    someCell.add(paragraph).setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    someCell = createTableCellNoBorder();
    someCell.add("1.4").setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    // row        
    paragraph = new Paragraph("2.1").setFontSize(7);
    someCell = createTableCellNoBorder();
    someCell.add(paragraph);
    table.addCell(someCell);

    someCell = createTableCellNoBorder();
    someCell.add("2.2");
    table.addCell(someCell);

    //row
    paragraph = new Paragraph("3.1").setFontSize(7);
    someCell = createTableCellNoBorder();
    someCell.add(paragraph);
    table.addCell(someCell);

    someCell = createTableCellNoBorder();
    someCell.add("3.2");
    table.addCell(someCell);

    //row
    someCell = createDoubleTableCell();
    paragraph = new Paragraph("4.1");
    paragraph.setBold();
    someCell.add(paragraph).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    someCell = createTableCellWithTopAndBottomBorders();
    someCell.add("4.2");
    table.addCell(someCell);

    //create row
    someCell = createDoubleTableCell();
    paragraph = new Paragraph("5.1");
    paragraph.setBold();
    someCell.add(paragraph).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    someCell = createTableCellWithTopAndBottomBorders();

    someCell.add("5.2");
    table.addCell(someCell);

    //create row
    someCell = createDoubleTableCell();
    paragraph = new Paragraph("6.1");
    paragraph.setBold();
    someCell.add(paragraph).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    someCell = createTableCellWithTopAndBottomBorders();

    someCell.add("6.2");
    table.addCell(someCell);

    //create row
    someCell = createDoubleTableCell();
    paragraph = new Paragraph("7.1");
    paragraph.setBold();
    someCell.add(paragraph).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    someCell = createTableCellWithTopAndBottomBorders();

    someCell.add("7.2");
    table.addCell(someCell);

    document.add(table);

    pdfDocument.close();
    writer.flush();
    writer.close();

}
    /**
 * Test of generate method, of class SummaryResultsVsAll.
 * @throws java.lang.Exception
 */
@Test
public void testGenerate2() throws Exception {
    System.out.println("generate");

    String outPdf = OUTPUT_FOLDER + "TableBorderTest2.pdf";
    PdfWriter writer = new PdfWriter(outPdf);
    PdfDocument pdfDocument;
    pdfDocument = new PdfDocument(writer);
    Document document = new Document(pdfDocument);

    Table table = new Table(new float[]{10f, 10f, 20.0F, 70.0F});
    table.setWidthPercent(100)
            .setPadding(0)
            .setFontSize(9);

    Cell aCell = new Cell(7, 1);
    aCell.add("1.1").setBorder(Border.NO_BORDER).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f));

    table.addCell(aCell);

    //create row
    Cell bCell = new Cell(3, 1);
    Paragraph paragraph = new Paragraph("1.2");
    paragraph.setBold();
    bCell.add(paragraph);
    bCell.setBorder(Border.NO_BORDER).setBorderTop(new SolidBorder(1f));
    table.addCell(bCell);

    //row
    paragraph = new Paragraph("1.3").setFontSize(7).setPaddingTop(10);
    Cell someCell = createTableCellNoBorder();
    someCell.add(paragraph).setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    someCell = createTableCellWithTopBorder();
    someCell.add("1.4");
    table.addCell(someCell);

    // row        
    paragraph = new Paragraph("2.1").setFontSize(7);
    someCell = createTableCellNoBorder();
    someCell.add(paragraph);
    table.addCell(someCell);

    someCell = createTableCellNoBorder();
    someCell.add("2.2");
    table.addCell(someCell);

    //row
    paragraph = new Paragraph("3.1").setFontSize(7);
    someCell = createTableCellNoBorder();
    someCell.add(paragraph);
    table.addCell(someCell);

    someCell = createTableCellNoBorder();
    someCell.add("3.2");
    table.addCell(someCell);

    //row
    someCell = createDoubleTableCell();
    paragraph = new Paragraph("4.1");
    paragraph.setBold();
    someCell.add(paragraph).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    someCell = createTableCellWithTopAndBottomBorders();
    someCell.add("4.2");
    table.addCell(someCell);

    //create row
    someCell = createDoubleTableCell();
    paragraph = new Paragraph("5.1");
    paragraph.setBold();
    someCell.add(paragraph).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    someCell = createTableCellWithTopAndBottomBorders();

    someCell.add("5.2");
    table.addCell(someCell);

    //create row
    someCell = createDoubleTableCell();
    paragraph = new Paragraph("6.1");
    paragraph.setBold();
    someCell.add(paragraph).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    someCell = createTableCellWithTopAndBottomBorders();

    someCell.add("6.2");
    table.addCell(someCell);

    //create row
    someCell = createDoubleTableCell();
    paragraph = new Paragraph("7.1");
    paragraph.setBold();
    someCell.add(paragraph).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f));
    table.addCell(someCell);

    someCell = createTableCellWithTopAndBottomBorders();

    someCell.add("7.2");
    table.addCell(someCell);

    document.add(table);

    pdfDocument.close();
    writer.flush();
    writer.close();

}

    private Cell createTableCellNoBorder() {
    Cell someCell;
    someCell = new Cell()
            .setPadding(0)
            .setBorder(Border.NO_BORDER)
            .setVerticalAlignment(VerticalAlignment.TOP);
    return someCell;
}
 private Cell createTableCellWithTopBorder() {
    Cell someCell;
    someCell = new Cell()
            .setPadding(0)
            .setBorderBottom(Border.NO_BORDER).setBorderLeft(Border.NO_BORDER).setBorderRight(Border.NO_BORDER).setBorderTop(new SolidBorder(1f))
            .setVerticalAlignment(VerticalAlignment.TOP);
    return someCell;
}

private Cell createTableCellWithTopAndBottomBorders() {
    Cell someCell;
    someCell = new Cell()
            .setPadding(0)
            .setBorder(Border.NO_BORDER).setBorderBottom(new SolidBorder(1f)).setBorderTop(new SolidBorder(1f))
            .setVerticalAlignment(VerticalAlignment.TOP);
    return someCell;
}

private Cell createDoubleTableCell() {
    Cell someCell;
    someCell = new Cell(1, 2)
            .setPadding(0)
            .setBorder(Border.NO_BORDER)
            .setVerticalAlignment(VerticalAlignment.TOP);
    return someCell;
}

---

}NullPointerException问题本质上与本文分析的错误相同。作为回应，开发代码中的bug已经修复

因此，使用当前的iText开发代码（当前的7.0.1-SNAPSHORT）运行测试类并没有导致异常并不令人惊讶

.setBorder(Border.NO_BORDER)
.setBorderTop(new SolidBorder(1f))

此外，两种试验方法的结果相同，如下所示：

---

因此，itext忽略无边框请求而只呈现所有边框的问题似乎也已得到解决。

NullPointerException问题本质上与本文分析的问题相同。作为回应，开发代码中的bug已经修复

因此，使用当前的iText开发代码（当前的7.0.1-SNAPSHORT）运行测试类并没有导致异常并不令人惊讶

.setBorder(Border.NO_BORDER)
.setBorderTop(new SolidBorder(1f))

此外，两种试验方法的结果相同，如下所示：

---

因此，itext忽略无边框请求而只呈现所有边框的问题似乎也已得到解决。

NullPointerException问题本质上与分析的问题相同。如果我没记错的话，它已经在开发代码中修复了。我刚刚使用iText 7.0.1-SNAPSHOT运行了您的测试代码，肯定没有例外。关于另一个问题，我不能确切地确定预期输出和您观察到的输出是什么，但确实没有iText只呈现所有边界的单元格：根本没有垂直边界。顺便说一下，很高兴你提供了一个可运行的示例。我更新了这个问题，以包括我得到的输出，其中单元格1.4呈现了所有四个边框。我还没有尝试过7.0.1-SNAPSHOT，所以希望它能解决这两个问题。谢谢。我想你有理由抱有希望。据我回忆，我在office的测试运行结果在这两种情况下都只有1.4的上边框。

NullPointerException

问题本质上与分析的错误相同。如果我没记错的话，它已经在开发代码中修复了。我刚刚使用iText 7.0.1-SNAPSHOT运行了您的测试代码，肯定没有例外。关于另一个问题，我不能确切地确定预期输出和您观察到的输出是什么，但确实没有iText只呈现所有边界的单元格：根本没有垂直边界。顺便说一下，很高兴你提供了一个可运行的示例。我更新了这个问题，以包括我得到的输出，其中单元格1.4呈现了所有四个边框。我还没有尝试过7.0.1-SNAPSHOT，所以希望它能解决这两个问题。谢谢。我想你有理由抱有希望。据我回忆，我在office中对这两种情况的测试结果都只有1.4的顶部边界。谢谢，我刚刚运行并验证了这两个问题将在7.0.1版本中得到修复。谢谢，我刚刚运行并验证了这两个问题将在7.0.1版本中得到修复。