Itext 如何在ColumnText中添加章节标题？

请问，我如何才能在专栏文本中添加章节标题？ 我需要这样制作PDF：

    |    ColumnText column1   |    ColumnText column2   |
    | PdfPTable with content  |  PdfPTable with content |
    |                         |      Chapter 2 title    |
    |     Chapter 1 title     |                         |

然后将TOC添加到此文档中。 我用列文本和表格制作文档。但无法在表中添加章节。 我只能将章节添加到文档正文中，但在本例中，章节标题不在ColumnText中

---

你的问题并不清楚，因为你没有告诉我们你是否想要这样的TOC：

public class TOCCreation extends PdfPageEventHelper {

    protected PdfOutline root;
    protected List<TOCEntry> toc = new ArrayList<TOCEntry>();

    public TOCCreation() {
    }

    public void setRoot(PdfOutline root) {
        this.root = root;
    }

    public List<TOCEntry> getToc() {
        return toc;
    }

    @Override
    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
        PdfDestination dest = new PdfDestination(PdfDestination.XYZ, rect.getLeft(), rect.getTop(), 0);
        new PdfOutline(root, dest, text);
        TOCEntry entry = new TOCEntry();
        entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
        entry.title = text;
        toc.add(entry);
    }
}

new PdfOutline(root, dest, text);

document.newPage();
for (TOCEntry entry : event.getToc()) {
    Chunk c = new Chunk(entry.title);
    c.setAction(entry.action);
    document.add(new Paragraph(c));
}

如果是这种情况，则说明您使用了错误的术语，因为您在“书签”面板中看到的内容可能被称为大纲或书签

如果你说你想要TOC，你想要这样的东西：

public class TOCCreation extends PdfPageEventHelper {

    protected PdfOutline root;
    protected List<TOCEntry> toc = new ArrayList<TOCEntry>();

    public TOCCreation() {
    }

    public void setRoot(PdfOutline root) {
        this.root = root;
    }

    public List<TOCEntry> getToc() {
        return toc;
    }

    @Override
    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
        PdfDestination dest = new PdfDestination(PdfDestination.XYZ, rect.getLeft(), rect.getTop(), 0);
        new PdfOutline(root, dest, text);
        TOCEntry entry = new TOCEntry();
        entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
        entry.title = text;
        toc.add(entry);
    }
}

new PdfOutline(root, dest, text);

document.newPage();
for (TOCEntry entry : event.getToc()) {
    Chunk c = new Chunk(entry.title);
    c.setAction(entry.action);
    document.add(new Paragraph(c));
}

我提到这两个，因为您谈到了

章节

（一个您不应该再使用的类），该类创建书签/大纲，而不是TOC

我已经创建了一个PDF文件，其中包含书签和TOC:。请看一看这个例子，了解它是如何完成的

与您一样，我创建了一个带有标题和表格的

ColumnText

对象：

ColumnText ct = new ColumnText(writer.getDirectContent());
int start;
int end;
for (int i = 0; i <= 20; ) {
    start = (i * 10) + 1;
    i++;
    end = i * 10;
    String title = String.format("Numbers from %s to %s", start, end);
    Chunk c = new Chunk(title);
    c.setGenericTag(title);
    ct.addElement(c);
    ct.addElement(createTable(start, end));
}
int column = 0;
do {
    if (column == 3) {
        document.newPage();
        column = 0;
    }
    ct.setSimpleColumn(COLUMNS[column++]);
} while (ColumnText.hasMoreText(ct.go()));

在这一行中，我们声明一个泛型标记。

TOCEntry

类使用此标记，如下所示：

public class TOCCreation extends PdfPageEventHelper {

    protected PdfOutline root;
    protected List<TOCEntry> toc = new ArrayList<TOCEntry>();

    public TOCCreation() {
    }

    public void setRoot(PdfOutline root) {
        this.root = root;
    }

    public List<TOCEntry> getToc() {
        return toc;
    }

    @Override
    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
        PdfDestination dest = new PdfDestination(PdfDestination.XYZ, rect.getLeft(), rect.getTop(), 0);
        new PdfOutline(root, dest, text);
        TOCEntry entry = new TOCEntry();
        entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
        entry.title = text;
        toc.add(entry);
    }
}

new PdfOutline(root, dest, text);

document.newPage();
for (TOCEntry entry : event.getToc()) {
    Chunk c = new Chunk(entry.title);
    c.setAction(entry.action);
    document.add(new Paragraph(c));
}

如果需要书签，可以创建如下

PdfOutline

：

public class TOCCreation extends PdfPageEventHelper {

    protected PdfOutline root;
    protected List<TOCEntry> toc = new ArrayList<TOCEntry>();

    public TOCCreation() {
    }

    public void setRoot(PdfOutline root) {
        this.root = root;
    }

    public List<TOCEntry> getToc() {
        return toc;
    }

    @Override
    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
        PdfDestination dest = new PdfDestination(PdfDestination.XYZ, rect.getLeft(), rect.getTop(), 0);
        new PdfOutline(root, dest, text);
        TOCEntry entry = new TOCEntry();
        entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
        entry.title = text;
        toc.add(entry);
    }
}

new PdfOutline(root, dest, text);

document.newPage();
for (TOCEntry entry : event.getToc()) {
    Chunk c = new Chunk(entry.title);
    c.setAction(entry.action);
    document.add(new Paragraph(c));
}

如果您想要TOC，可以将

字符串

和

pdp>存储在
列表中
：

TOCEntry entry = new TOCEntry();
entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
entry.title = text;
toc.add(entry);

现在我们了解了
tocreation
类，我们来看看如何使用它：

PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));
TOCCreation event = new TOCCreation();
writer.setPageEvent(event);
document.open();
event.setRoot(writer.getRootOutline())

我们创建一个
事件
对象，将其传递给
编写器
，打开文档后，将大纲树的根传递给事件。书签将自动创建，TOC不会。如果要添加TOC，则需要以下内容：

public class TOCCreation extends PdfPageEventHelper {

    protected PdfOutline root;
    protected List<TOCEntry> toc = new ArrayList<TOCEntry>();

    public TOCCreation() {
    }

    public void setRoot(PdfOutline root) {
        this.root = root;
    }

    public List<TOCEntry> getToc() {
        return toc;
    }

    @Override
    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
        PdfDestination dest = new PdfDestination(PdfDestination.XYZ, rect.getLeft(), rect.getTop(), 0);
        new PdfOutline(root, dest, text);
        TOCEntry entry = new TOCEntry();
        entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
        entry.title = text;
        toc.add(entry);
    }
}

new PdfOutline(root, dest, text);

document.newPage();
for (TOCEntry entry : event.getToc()) {
    Chunk c = new Chunk(entry.title);
    c.setAction(entry.action);
    document.add(new Paragraph(c));
}

您现在有了一个标题列表，您可以单击该列表跳转到相应的表格。
您的问题并不清楚，因为您没有告诉我们您是否想要这样的TOC：

public class TOCCreation extends PdfPageEventHelper {

    protected PdfOutline root;
    protected List<TOCEntry> toc = new ArrayList<TOCEntry>();

    public TOCCreation() {
    }

    public void setRoot(PdfOutline root) {
        this.root = root;
    }

    public List<TOCEntry> getToc() {
        return toc;
    }

    @Override
    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
        PdfDestination dest = new PdfDestination(PdfDestination.XYZ, rect.getLeft(), rect.getTop(), 0);
        new PdfOutline(root, dest, text);
        TOCEntry entry = new TOCEntry();
        entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
        entry.title = text;
        toc.add(entry);
    }
}

new PdfOutline(root, dest, text);

document.newPage();
for (TOCEntry entry : event.getToc()) {
    Chunk c = new Chunk(entry.title);
    c.setAction(entry.action);
    document.add(new Paragraph(c));
}


如果是这种情况，则说明您使用了错误的术语，因为您在“书签”面板中看到的内容可能被称为大纲或书签

如果你说你想要TOC，你想要这样的东西：

public class TOCCreation extends PdfPageEventHelper {

    protected PdfOutline root;
    protected List<TOCEntry> toc = new ArrayList<TOCEntry>();

    public TOCCreation() {
    }

    public void setRoot(PdfOutline root) {
        this.root = root;
    }

    public List<TOCEntry> getToc() {
        return toc;
    }

    @Override
    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
        PdfDestination dest = new PdfDestination(PdfDestination.XYZ, rect.getLeft(), rect.getTop(), 0);
        new PdfOutline(root, dest, text);
        TOCEntry entry = new TOCEntry();
        entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
        entry.title = text;
        toc.add(entry);
    }
}

new PdfOutline(root, dest, text);

document.newPage();
for (TOCEntry entry : event.getToc()) {
    Chunk c = new Chunk(entry.title);
    c.setAction(entry.action);
    document.add(new Paragraph(c));
}


我提到这两个，因为您谈到了
章节
（一个您不应该再使用的类），该类创建书签/大纲，而不是TOC

我已经创建了一个PDF文件，其中包含书签和TOC:。请看一看这个例子，了解它是如何完成的

与您一样，我创建了一个带有标题和表格的
ColumnText
对象：

ColumnText ct = new ColumnText(writer.getDirectContent());
int start;
int end;
for (int i = 0; i <= 20; ) {
    start = (i * 10) + 1;
    i++;
    end = i * 10;
    String title = String.format("Numbers from %s to %s", start, end);
    Chunk c = new Chunk(title);
    c.setGenericTag(title);
    ct.addElement(c);
    ct.addElement(createTable(start, end));
}
int column = 0;
do {
    if (column == 3) {
        document.newPage();
        column = 0;
    }
    ct.setSimpleColumn(COLUMNS[column++]);
} while (ColumnText.hasMoreText(ct.go()));

在这一行中，我们声明一个泛型标记。
TOCEntry
类使用此标记，如下所示：

public class TOCCreation extends PdfPageEventHelper {

    protected PdfOutline root;
    protected List<TOCEntry> toc = new ArrayList<TOCEntry>();

    public TOCCreation() {
    }

    public void setRoot(PdfOutline root) {
        this.root = root;
    }

    public List<TOCEntry> getToc() {
        return toc;
    }

    @Override
    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
        PdfDestination dest = new PdfDestination(PdfDestination.XYZ, rect.getLeft(), rect.getTop(), 0);
        new PdfOutline(root, dest, text);
        TOCEntry entry = new TOCEntry();
        entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
        entry.title = text;
        toc.add(entry);
    }
}

new PdfOutline(root, dest, text);

document.newPage();
for (TOCEntry entry : event.getToc()) {
    Chunk c = new Chunk(entry.title);
    c.setAction(entry.action);
    document.add(new Paragraph(c));
}

如果需要书签，可以创建如下
PdfOutline
：

public class TOCCreation extends PdfPageEventHelper {

    protected PdfOutline root;
    protected List<TOCEntry> toc = new ArrayList<TOCEntry>();

    public TOCCreation() {
    }

    public void setRoot(PdfOutline root) {
        this.root = root;
    }

    public List<TOCEntry> getToc() {
        return toc;
    }

    @Override
    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
        PdfDestination dest = new PdfDestination(PdfDestination.XYZ, rect.getLeft(), rect.getTop(), 0);
        new PdfOutline(root, dest, text);
        TOCEntry entry = new TOCEntry();
        entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
        entry.title = text;
        toc.add(entry);
    }
}

new PdfOutline(root, dest, text);

document.newPage();
for (TOCEntry entry : event.getToc()) {
    Chunk c = new Chunk(entry.title);
    c.setAction(entry.action);
    document.add(new Paragraph(c));
}

如果您想要TOC，可以将
字符串
和
pdp>存储在
列表中
：

TOCEntry entry = new TOCEntry();
entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
entry.title = text;
toc.add(entry);

现在我们了解了
tocreation
类，我们来看看如何使用它：

PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));
TOCCreation event = new TOCCreation();
writer.setPageEvent(event);
document.open();
event.setRoot(writer.getRootOutline())

我们创建一个
事件
对象，将其传递给
编写器
，打开文档后，将大纲树的根传递给事件。书签将自动创建，TOC不会。如果要添加TOC，则需要以下内容：

public class TOCCreation extends PdfPageEventHelper {

    protected PdfOutline root;
    protected List<TOCEntry> toc = new ArrayList<TOCEntry>();

    public TOCCreation() {
    }

    public void setRoot(PdfOutline root) {
        this.root = root;
    }

    public List<TOCEntry> getToc() {
        return toc;
    }

    @Override
    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
        PdfDestination dest = new PdfDestination(PdfDestination.XYZ, rect.getLeft(), rect.getTop(), 0);
        new PdfOutline(root, dest, text);
        TOCEntry entry = new TOCEntry();
        entry.action = PdfAction.gotoLocalPage(writer.getPageNumber(), dest, writer);
        entry.title = text;
        toc.add(entry);
    }
}

new PdfOutline(root, dest, text);

document.newPage();
for (TOCEntry entry : event.getToc()) {
    Chunk c = new Chunk(entry.title);
    c.setAction(entry.action);
    document.add(new Paragraph(c));
}

现在您有了一个标题列表，可以单击该列表跳转到相应的表