[DEV-000] 동아리원 명단 다운로드 파일 메뉴얼 이미지 추가 (#96)

src/main/java/ddingdong/ddingdongBE/file/service/ExcelFileService.java

@@ -7,18 +7,24 @@
 import ddingdong.ddingdongBE.file.dto.ExcelClubMemberDto;
 import java.awt.Color;
 import java.io.ByteArrayOutputStream;
+import java.io.FileInputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.apache.poi.openxml4j.exceptions.NotOfficeXmlFileException;
 import org.apache.poi.ss.usermodel.Cell;
 import org.apache.poi.ss.usermodel.CellType;
+import org.apache.poi.ss.usermodel.ClientAnchor;
+import org.apache.poi.ss.usermodel.CreationHelper;
+import org.apache.poi.ss.usermodel.Drawing;
 import org.apache.poi.ss.usermodel.FillPatternType;
 import org.apache.poi.ss.usermodel.Font;
 import org.apache.poi.ss.usermodel.Row;
 import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.util.IOUtils;
 import org.apache.poi.xssf.usermodel.XSSFCellStyle;
 import org.apache.poi.xssf.usermodel.XSSFColor;
 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
@@ -29,38 +35,18 @@
 @RequiredArgsConstructor
 public class ExcelFileService {
 
+    private static final String CLUB_MEMBER_EXCEL_MANUAL_IMAGE_PATH = "src/main/resources/static/club_member_excel_menual.png";
+
     public byte[] generateClubMemberListFile(List<ClubMember> clubMembers) {
         try (Workbook workbook = new XSSFWorkbook()) {
             Sheet sheet = workbook.createSheet("동아리원 명단");
+            sheet.setZoom(125);
+            createHeaderRow(workbook, sheet);
+            createDataRow(clubMembers, sheet);
+            addManualImage(workbook, sheet);
 
-            XSSFCellStyle headerCellStyle = (XSSFCellStyle) workbook.createCellStyle();
-            XSSFColor myColor = new XSSFColor(new Color(177, 207, 149), null);
-            headerCellStyle.setFillForegroundColor(myColor);
-            headerCellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
-
-            Font headerFont = workbook.createFont();
-            headerFont.setBold(true);
-            headerCellStyle.setFont(headerFont);
-
-            // Header row
-            Row headerRow = sheet.createRow(0);
-            String[] headers = {"식별자(수정X)", "이름", "학번", "연락처", "비교(임원진) - 영어만", "학과(부)"};
-            for (int i = 0; i < headers.length; i++) {
-                Cell cell = headerRow.createCell(i);
-                cell.setCellValue(headers[i]);
-                cell.setCellStyle(headerCellStyle);
-            }
-
-            // Data rows
-            int rowNum = 1;
-            for (ClubMember clubMember : clubMembers) {
-                Row row = sheet.createRow(rowNum++);
-                row.createCell(0).setCellValue(clubMember.getId());
-                row.createCell(1).setCellValue(clubMember.getName());
-                row.createCell(2).setCellValue(clubMember.getStudentNumber());
-                row.createCell(3).setCellValue(clubMember.getPhoneNumber());
-                row.createCell(4).setCellValue(clubMember.getPosition().name());
-                row.createCell(5).setCellValue(clubMember.getDepartment());
+            for (int i = 0; i < 13; i++) {
+                sheet.autoSizeColumn(i);
             }
 
             ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
@@ -102,4 +88,55 @@ private List<ExcelClubMemberDto> parsingClubMemberListFile(MultipartFile clubMem
         return requestedClubMembersDto;
     }
 
+
+    private void createHeaderRow(Workbook workbook, Sheet sheet) {
+        XSSFCellStyle headerCellStyle = (XSSFCellStyle) workbook.createCellStyle();
+        XSSFColor myColor = new XSSFColor(new Color(177, 207, 149), null);
+        headerCellStyle.setFillForegroundColor(myColor);
+        headerCellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
+
+        Font headerFont = workbook.createFont();
+        headerFont.setBold(true);
+        headerCellStyle.setFont(headerFont);
+
+        Row headerRow = sheet.createRow(0);
+        String[] headers = {"식별자(수정X)", "이름", "학번", "연락처", "비교(임원진) - 영어만", "학과(부)"};
+        for (int i = 0; i < headers.length; i++) {
+            Cell cell = headerRow.createCell(i);
+            cell.setCellValue(headers[i]);
+            cell.setCellStyle(headerCellStyle);
+        }
+
+    }
+
+    private void createDataRow(List<ClubMember> clubMembers, Sheet sheet) {
+        int rowNum = 1;
+        for (ClubMember clubMember : clubMembers) {
+            Row row = sheet.createRow(rowNum++);
+            row.createCell(0).setCellValue(clubMember.getId());
+            row.createCell(1).setCellValue(clubMember.getName());
+            row.createCell(2).setCellValue(clubMember.getStudentNumber());
+            row.createCell(3).setCellValue(clubMember.getPhoneNumber());
+            row.createCell(4).setCellValue(clubMember.getPosition().name());
+            row.createCell(5).setCellValue(clubMember.getDepartment());
+        }
+    }
+
+    private void addManualImage(Workbook workbook, Sheet sheet) throws IOException {
+        InputStream inputStream = new FileInputStream(CLUB_MEMBER_EXCEL_MANUAL_IMAGE_PATH);
+        byte[] bytes = IOUtils.toByteArray(inputStream);
+        int pictureIdx = workbook.addPicture(bytes, Workbook.PICTURE_TYPE_PNG);
+        inputStream.close();
+
+        CreationHelper helper = workbook.getCreationHelper();
+        Drawing<?> drawing = sheet.createDrawingPatriarch();
+        ClientAnchor anchor = helper.createClientAnchor();
+
+        anchor.setCol1(8);
+        anchor.setRow1(0);
+        anchor.setCol2(anchor.getCol1() + 7);
+        anchor.setRow2(26);
+
+        drawing.createPicture(anchor, pictureIdx);
+    }
 }