我在使用iText将主PdfPTable的第一行和第二行保持在一起时遇到麻烦。我的第一行包括一个带有一些基本信息的PdfPTable。第二行包含一个PdfPTable，其中包含所有列表信息。每次列表信息太大而跨越多页时，它都会自动踢到第二页，而不是直接显示在基本信息下方，然后分页到下一页。如何避免这个问题？我尝试使用setSplitRows（false），但我只是得到了一个空白文档（请参见第117和170行注释）。如何将列表数据（第二行）放在第一页上？我的代码示例如下所示（您应该能够复制/粘贴）。
public class TestHelper{
private TestEventHelper helper;
public TestHelper(){
super();
helper = new TestEventHelper();
}
public TestEventHelper getHelper() {
return helper;
}
public void setHelper(TestEventHelper helper) {
this.helper = helper;
}
public static void main(String[] args){
TestHelper test = new TestHelper();
TestEventHelper helper = test.getHelper();
FileOutputStream file = null;
Document document = null;
PdfWriter writer = null;
try {
file = new FileOutputStream(new File("C://Documents and Settings//All Users//Desktop//pdffile2.pdf"));
document = new Document(PageSize.A4.rotate(), 36, 36, 36, 36);
writer = PdfWriter.getInstance(document, file);
// writer.setPageEvent(templateHelper);
writer.setPdfVersion(PdfWriter.PDF_VERSION_1_7);
writer.setUserunit(1f);
document.open();
List<Element> pages = null;
try {
pages = helper.createTemplate();
} catch (Exception e) {
e.printStackTrace();
}
Iterator<Element> iterator = pages.iterator();
while (iterator.hasNext()) {
Element element = iterator.next();
if (element instanceof Phrase) {
document.newPage();
} else {
document.add(element);
}
}
} catch (Exception de) {
de.printStackTrace();
// log.debug("Exception " + de + " " + de.getMessage());
} finally {
if (document != null) {
document.close();
}
if (writer != null) {
writer.close();
}
}
System.out.println("Done!");
}
private class TestEventHelper extends PdfPageEventHelper{
// The PdfTemplate that contains the total number of pages.
protected PdfTemplate total;
protected BaseFont helv;
private static final float SMALL_MARGIN = 20f;
private static final float MARGIN = 36f;
private final Font font = new Font(Font.HELVETICA, 12, Font.BOLD);
private final Font font2 = new Font(Font.HELVETICA, 10, Font.BOLD);
private final Font smallFont = new Font(Font.HELVETICA, 10, Font.NORMAL);
private String[] datatableHeaderFields = new String[]{"Header1", "Header2", "Header3", "Header4", "Header5", "Header6", "Header7", "Header8", "Header9"};
public TestEventHelper(){
super();
}
public List<Element> createTemplate() throws Exception {
List<Element> elementList = new ArrayList<Element>();
float[] tableWidths = new float[]{1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.25f, 1.25f, 1.25f, 1.25f};
// logger.debug("entering create reports template...");
PdfPTable splitTable = new PdfPTable(1);
splitTable.setSplitRows(false);
splitTable.setWidthPercentage(100f);
PdfPTable pageTable = new PdfPTable(1);
pageTable.setKeepTogether(true);
pageTable.setWidthPercentage(100f);
PdfPTable searchTable = generateSearchFields();
if(searchTable != null){
searchTable.setSpacingAfter(25f);
}
PdfPTable outlineTable = new PdfPTable(1);
outlineTable.setKeepTogether(true);
outlineTable.setWidthPercentage(100f);
PdfPTable datatable = new PdfPTable(datatableHeaderFields.length);
datatable.setKeepTogether(false);
datatable.setWidths(tableWidths);
generateDatatableHeader(datatable);
for(int i = 0; i < 100; i++){
addCell(datatable, String.valueOf(i), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+1), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+2), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+3), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+4), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+5), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+6), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+7), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+8), 1, Rectangle.NO_BORDER, Element.ALIGN_RIGHT, smallFont, true);
}
PdfPCell dataCell = new PdfPCell(datatable);
dataCell.setBorder(Rectangle.BOX);
outlineTable.addCell(dataCell);
PdfPCell searchCell = new PdfPCell(searchTable);
searchCell.setVerticalAlignment(Element.ALIGN_TOP);
PdfPCell outlineCell = new PdfPCell(outlineTable);
outlineCell.setVerticalAlignment(Element.ALIGN_TOP);
addCell(pageTable, searchCell, 1, Rectangle.NO_BORDER, Element.ALIGN_LEFT, null, null);
addCell(pageTable, outlineCell, 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, null, null);
PdfPCell pageCell = new PdfPCell(pageTable);
pageCell.setVerticalAlignment(Element.ALIGN_TOP);
addCell(splitTable, pageCell, 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, null, null);
elementList.add(pageTable);
// elementList.add(splitTable);
return elementList;
}
public void onOpenDocument(PdfWriter writer, Document document) {
total = writer.getDirectContent().createTemplate(100, 100);
total.setBoundingBox(new Rectangle(-20, -20, 100, 100));
try {
helv = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
} catch (Exception e) {
throw new ExceptionConverter(e);
}
}
public void onEndPage(PdfWriter writer, Document document) {
//TODO
}
public void onCloseDocument(PdfWriter writer, Document document) {
total.beginText();
total.setFontAndSize(helv, 10);
total.setTextMatrix(0, 0);
total.showText(String.valueOf(writer.getPageNumber() - 1));
total.endText();
}
private PdfPTable generateSearchFields(){
PdfPTable searchTable = new PdfPTable(2);
for(int i = 0; i < 6; i++){
addCell(searchTable, "Search Key" +i, 1, Rectangle.NO_BORDER, Element.ALIGN_RIGHT, font2, MARGIN, true);
addCell(searchTable, "Search Value +i", 1, Rectangle.NO_BORDER, Element.ALIGN_LEFT, smallFont, null, true);
}
return searchTable;
}
private void generateDatatableHeader(PdfPTable datatable) {
if (datatableHeaderFields != null && datatableHeaderFields.length != 0) {
for (int i = 0; i < datatableHeaderFields.length; i++) {
addCell(datatable, datatableHeaderFields[i], 1, Rectangle.BOX, Element.ALIGN_CENTER, font2);
}
}
}
private PdfPCell addCell(PdfPTable table, String cellContent, int colspan, int cellBorder, int horizontalAlignment, Font font) {
return addCell(table, cellContent, colspan, cellBorder, horizontalAlignment, font, null, null);
}
private PdfPCell addCell(PdfPTable table, String cellContent, int colspan, int cellBorder, int horizontalAlignment, Font font, Boolean noWrap) {
return addCell(table, cellContent, colspan, cellBorder, horizontalAlignment, font, null, noWrap);
}
private PdfPCell addCell(PdfPTable table, String cellContent, Integer colspan, Integer cellBorder, Integer horizontalAlignment, Font font, Float paddingLeft, Boolean noWrap) {
PdfPCell cell = new PdfPCell(new Phrase(cellContent, font));
return addCell(table, cell, colspan, cellBorder, horizontalAlignment, paddingLeft, noWrap);
}
private PdfPCell addCell(PdfPTable table, PdfPCell cell, int colspan, int cellBorder, int horizontalAlignment, Float paddingLeft, Boolean noWrap) {
cell.setColspan(colspan);
cell.setBorder(cellBorder);
cell.setHorizontalAlignment(horizontalAlignment);
if(paddingLeft != null){
cell.setPaddingLeft(paddingLeft);
}
if(noWrap != null){
cell.setNoWrap(noWrap);
}
table.addCell(cell);
return cell;
}
}
}
最佳答案
该问题是由嵌套的PdfPTable引起的。 iText无法以您想要的方式拆分包含大表的单个单元格。最好的选择是使用2个单独的表，其中1个用于顶部的基本信息，第二个用于数据。
我通过注释掉createTemplate（）中的一些嵌套代码来使您的代码正常工作
public List<Element> createTemplate() throws Exception {
List<Element> elementList = new ArrayList<Element>();
float[] tableWidths = new float[]{1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.25f, 1.25f, 1.25f, 1.25f};
// logger.debug("entering create reports template...");
PdfPTable splitTable = new PdfPTable(1);
splitTable.setSplitRows(false);
splitTable.setWidthPercentage(100f);
PdfPTable pageTable = new PdfPTable(1);
pageTable.setKeepTogether(true);
pageTable.setWidthPercentage(100f);
PdfPTable searchTable = generateSearchFields();
if(searchTable != null){
searchTable.setSpacingAfter(25f);
}
PdfPTable outlineTable = new PdfPTable(1);
outlineTable.setKeepTogether(true);
outlineTable.setWidthPercentage(100f);
PdfPTable datatable = new PdfPTable(datatableHeaderFields.length);
// datatable.setKeepTogether(false);
datatable.setWidths(tableWidths);
generateDatatableHeader(datatable);
for(int i = 0; i < 100; i++){
addCell(datatable, String.valueOf(i), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+1), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+2), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+3), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+4), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+5), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+6), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+7), 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, smallFont, true);
addCell(datatable, String.valueOf(i+8), 1, Rectangle.NO_BORDER, Element.ALIGN_RIGHT, smallFont, true);
}
// PdfPCell dataCell = new PdfPCell(datatable);
// dataCell.setBorder(Rectangle.BOX);
// outlineTable.addCell(dataCell);
//
// PdfPCell searchCell = new PdfPCell(searchTable);
// searchCell.setVerticalAlignment(Element.ALIGN_TOP);
//
// PdfPCell outlineCell = new PdfPCell(outlineTable);
// outlineCell.setVerticalAlignment(Element.ALIGN_TOP);
//
// addCell(pageTable, searchCell, 1, Rectangle.NO_BORDER, Element.ALIGN_LEFT, null, null);
// addCell(pageTable, outlineCell, 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, null, null);
//
// PdfPCell pageCell = new PdfPCell(pageTable);
// pageCell.setVerticalAlignment(Element.ALIGN_TOP);
// addCell(splitTable, pageCell, 1, Rectangle.NO_BORDER, Element.ALIGN_CENTER, null, null);
elementList.add(searchTable);
elementList.add(datatable);
// elementList.add(pageTable);
// elementList.add(splitTable);
return elementList;
}
关于java - iText无法将行保持在一起，第二行跨越多页，但不会与第一行保持一致，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/2959193/