error handling, excel, bug fixes, name fixes (#57)

src/main/java/stirling/software/SPDF/controller/converters/ConvertImgPDFController.java

@@ -43,7 +43,7 @@ public class ConvertImgPDFController {
         byte[] bytes = PdfUtils.convertToPdf(file.getInputStream());
         logger.info("File {} successfully converted to pdf", file.getOriginalFilename());
 
-        return PdfUtils.bytesToWebResponse(bytes, file.getName() + "_coverted.pdf");
+        return PdfUtils.bytesToWebResponse(bytes, file.getOriginalFilename().replaceFirst("[.][^.]+$", "")+ "_coverted.pdf");
     }
 
     @PostMapping("/pdf-to-img")

src/main/java/stirling/software/SPDF/controller/converters/ConvertXlsxController.java

@@ -0,0 +1,81 @@
+package stirling.software.SPDF.controller.converters;
+
+import java.io.ByteArrayOutputStream;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+import org.apache.poi.ss.usermodel.Color;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.ss.usermodel.WorkbookFactory;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.multipart.MultipartFile;
+
+import com.itextpdf.text.BaseColor;
+import com.itextpdf.text.Document;
+import com.itextpdf.text.DocumentException;
+import com.itextpdf.text.Element;
+import com.itextpdf.text.pdf.PdfPCell;
+import com.itextpdf.text.pdf.PdfPTable;
+import com.itextpdf.text.pdf.PdfWriter;
+
+import stirling.software.SPDF.utils.PdfUtils;
+
+@Controller
+public class ConvertXlsxController {
+
+    
+    @GetMapping("/xlsx-to-pdf")
+    public String cinvertToPDF(Model model) {
+        model.addAttribute("currentPage", "xlsx-to-pdf");
+        return "convert/xlsx-to-pdf";
+    }
+
+    @PostMapping("/xlsx-to-pdf")
+    public ResponseEntity<byte[]> convertToPDF(@RequestParam("fileInput") MultipartFile xlsx) throws IOException, DocumentException{
+     // Load Excel file
+
+        Workbook workbook = WorkbookFactory.create(xlsx.getInputStream());
+        
+        // Create PDF document
+        Document document = new Document();
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        PdfWriter.getInstance(document, outputStream);
+        document.open();
+
+        // Convert each sheet in Excel to a separate page in PDF
+        for (int i = 0; i < workbook.getNumberOfSheets(); i++) {
+            PdfPTable table = new PdfPTable(workbook.getSheetAt(i).getRow(0).getPhysicalNumberOfCells());
+            for (int row = 0; row < workbook.getSheetAt(i).getPhysicalNumberOfRows(); row++) {
+                for (int cell = 0; cell < workbook.getSheetAt(i).getRow(row).getPhysicalNumberOfCells(); cell++) {
+                    PdfPCell pdfCell = new PdfPCell();
+                    pdfCell.addElement(new com.itextpdf.text.Paragraph(workbook.getSheetAt(i).getRow(row).getCell(cell).toString()));
+
+                 // Copy cell style, borders, and background color
+                    pdfCell.setBorderColor(new BaseColor(workbook.getSheetAt(i).getRow(row).getCell(cell).getCellStyle().getBottomBorderColor()));
+                    pdfCell.setBorderColor(new BaseColor(workbook.getSheetAt(i).getRow(row).getCell(cell).getCellStyle().getTopBorderColor()));
+                    pdfCell.setBorderColor(new BaseColor(workbook.getSheetAt(i).getRow(row).getCell(cell).getCellStyle().getLeftBorderColor()));
+                    pdfCell.setBorderColor(new BaseColor(workbook.getSheetAt(i).getRow(row).getCell(cell).getCellStyle().getRightBorderColor()));
+                    Short bc = workbook.getSheetAt(i).getRow(row).getCell(cell).getCellStyle().getFillBackgroundColor();
+                    pdfCell.setBackgroundColor(new BaseColor(bc));
+
+                    table.addCell(pdfCell);
+                }
+            }
+            document.add(table);
+        }
+        // Close document and output stream
+        document.close();
+        outputStream.flush();
+        outputStream.close();
+        return PdfUtils.boasToWebResponse(outputStream, xlsx.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_convertedToPDF.pdf");
+        // Close document and input stream
+        
+
+    }
+}