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BAEL-7278 Modify the code based on the feedback

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SGWebFreelancer 2023-12-13 10:33:56 +08:00
parent c314363bcf
commit 29c0b906b5
3 changed files with 111 additions and 29 deletions
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140
pdf-2/src/main/java/com/baeldung/exceltopdf/ExcelToPDFConverter.java
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@ -3,10 +3,13 @@ package com.baeldung.exceltopdf;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.math.BigDecimal;
import java.util.Iterator;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.xssf.usermodel.XSSFColor;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFSheet;
@ -14,31 +17,40 @@ import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Cell;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Font;
import com.itextpdf.text.FontFactory;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import com.itextpdf.text.pdf.PdfWriter;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class ExcelToPDFConverter {
private static final Logger logger = LogManager.getLogger(ExcelToPDFConverter.class);
public static XSSFWorkbook readExcelFile(String excelFilePath) throws IOException {
FileInputStream inputStream = new FileInputStream(excelFilePath);
XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
inputStream.close();
return workbook;
}
private static Document createPDFDocument(String pdfFilePath) throws IOException, DocumentException {
Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream(pdfFilePath));
document.open();
return document;
}
public static void convertExcelToPDF(String excelFilePath, String pdfFilePath) throws IOException, DocumentException {
XSSFWorkbook workbook = readExcelFile(excelFilePath);
Document document = createPDFDocument(pdfFilePath);
@ -48,6 +60,7 @@ public class ExcelToPDFConverter {
// Add header with sheet name as title
Paragraph title = new Paragraph(worksheet.getSheetName(), new Font(Font.FontFamily.HELVETICA, 18, Font.BOLD));
title.setSpacingAfter(20f);
title.setAlignment(Element.ALIGN_CENTER);
document.add(title);
@ -63,7 +76,8 @@ public class ExcelToPDFConverter {
}
private static void createAndAddTable(XSSFSheet worksheet, Document document) throws DocumentException, IOException {
PdfPTable table = new PdfPTable(worksheet.getRow(0).getPhysicalNumberOfCells());
PdfPTable table = new PdfPTable(worksheet.getRow(0)
.getPhysicalNumberOfCells());
table.setWidthPercentage(100);
addTableHeader(worksheet, table);
addTableData(worksheet, table);
@ -74,9 +88,27 @@ public class ExcelToPDFConverter {
Row headerRow = worksheet.getRow(0);
for (int i = 0; i < headerRow.getPhysicalNumberOfCells(); i++) {
Cell cell = headerRow.getCell(i);
String headerText = cell.getCellType() == CellType.STRING ? cell.getStringCellValue() : String.valueOf(cell.getNumericCellValue());
String headerText;
switch (cell.getCellType()) {
case STRING:
headerText = cell.getStringCellValue();
break;
case NUMERIC:
headerText = String.valueOf(BigDecimal.valueOf(cell.getNumericCellValue()));
break;
case BLANK:
headerText = ""; // or null
break;
default:
logger.warn("Unsupported cell type: {}", cell.getCellType());
headerText = ""; // or throw an exception
break;
}
PdfPCell headerCell = new PdfPCell(new Phrase(headerText, getCellStyle(cell)));
headerCell.setHorizontalAlignment(Element.ALIGN_CENTER);
setBackgroundColor(cell, headerCell);
setCellAlignment(cell, headerCell);
table.addCell(headerCell);
}
}
@ -91,42 +123,81 @@ public class ExcelToPDFConverter {
for (int i = 0; i < row.getPhysicalNumberOfCells(); i++) {
Cell cell = row.getCell(i);
String cellValue;
if (cell != null) {
if (cell.getCellType() == CellType.STRING) {
cellValue = cell.getStringCellValue();
} else if (cell.getCellType() == CellType.NUMERIC) {
cellValue = String.valueOf(cell.getNumericCellValue());
} else {
cellValue = "";
}
if (cell.getCellType() == CellType.STRING) {
cellValue = cell.getStringCellValue();
} else if (cell.getCellType() == CellType.NUMERIC) {
cellValue = String.valueOf(cell.getNumericCellValue());
} else {
cellValue = "";
}
PdfPCell cellPdf = new PdfPCell(new Phrase(cellValue, getCellStyle(cell)));
// Set background color
short bgColorIndex = cell.getCellStyle()
.getFillForegroundColor();
if (bgColorIndex != IndexedColors.AUTOMATIC.getIndex()) {
XSSFColor bgColor = (XSSFColor) cell.getCellStyle()
.getFillForegroundColorColor();
if (bgColor != null) {
byte[] rgb = bgColor.getRGB();
if (rgb != null && rgb.length == 3) {
cellPdf.setBackgroundColor(new BaseColor(rgb[0] & 0xFF, rgb[1] & 0xFF, rgb[2] & 0xFF));
}
}
}
cellPdf.setHorizontalAlignment(Element.ALIGN_CENTER);
setBackgroundColor(cell, cellPdf);
setCellAlignment(cell, cellPdf);
table.addCell(cellPdf);
}
}
}
private static Font getCellStyle(Cell cell) throws DocumentException, IOException {
Font font = new Font(Font.FontFamily.HELVETICA, 12);
private static void setBackgroundColor(Cell cell, PdfPCell cellPdf) {
// Set background color
short bgColorIndex = cell.getCellStyle()
.getFillForegroundColor();
if (bgColorIndex != IndexedColors.AUTOMATIC.getIndex()) {
XSSFColor bgColor = (XSSFColor) cell.getCellStyle()
.getFillForegroundColorColor();
if (bgColor != null) {
byte[] rgb = bgColor.getRGB();
if (rgb != null && rgb.length == 3) {
cellPdf.setBackgroundColor(new BaseColor(rgb[0] & 0xFF, rgb[1] & 0xFF, rgb[2] & 0xFF));
}
}
}
}
private static void setCellAlignment(Cell cell, PdfPCell cellPdf) {
CellStyle cellStyle = cell.getCellStyle();
org.apache.poi.ss.usermodel.Font cellFont = cell.getSheet().getWorkbook().getFontAt(cellStyle.getFontIndexAsInt());
HorizontalAlignment horizontalAlignment = cellStyle.getAlignment();
VerticalAlignment verticalAlignment = cellStyle.getVerticalAlignment();
switch (horizontalAlignment) {
case LEFT:
cellPdf.setHorizontalAlignment(Element.ALIGN_LEFT);
break;
case CENTER:
cellPdf.setHorizontalAlignment(Element.ALIGN_CENTER);
break;
case JUSTIFY:
case FILL:
cellPdf.setVerticalAlignment(Element.ALIGN_JUSTIFIED);
break;
case RIGHT:
cellPdf.setHorizontalAlignment(Element.ALIGN_RIGHT);
break;
}
switch (verticalAlignment) {
case TOP:
cellPdf.setVerticalAlignment(Element.ALIGN_TOP);
break;
case CENTER:
cellPdf.setVerticalAlignment(Element.ALIGN_MIDDLE);
break;
case JUSTIFY:
cellPdf.setVerticalAlignment(Element.ALIGN_JUSTIFIED);
break;
case BOTTOM:
cellPdf.setVerticalAlignment(Element.ALIGN_BOTTOM);
break;
}
}
private static Font getCellStyle(Cell cell) throws DocumentException, IOException {
Font font = new Font();
CellStyle cellStyle = cell.getCellStyle();
org.apache.poi.ss.usermodel.Font cellFont = cell.getSheet()
.getWorkbook()
.getFontAt(cellStyle.getFontIndexAsInt());
short fontColorIndex = cellFont.getColor();
if (fontColorIndex != IndexedColors.AUTOMATIC.getIndex() && cellFont instanceof XSSFFont) {
@ -138,6 +209,7 @@ public class ExcelToPDFConverter {
}
}
}
if (cellFont.getItalic()) {
font.setStyle(Font.ITALIC);
}
@ -156,6 +228,16 @@ public class ExcelToPDFConverter {
if (cellFont.getBold()) {
font.setStyle(Font.BOLD);
}
String fontName = cellFont.getFontName();
if (FontFactory.isRegistered(fontName)) {
font.setFamily(fontName); // Use extracted font family if supported by iText
} else {
logger.warn("Unsupported font type: {}", fontName);
// - Use a fallback font (e.g., Helvetica)
font.setFamily("Helvetica");
}
return font;
}

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pdf-2/src/main/resources/excelsample.xlsx
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pdf-2/src/main/resources/pdfsample.pdf
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