POI - Excel 파일 내에 이미지 추출

출처 : Apache POI - the Java API for Microsoft Documents
java - Get an image and its position from excel file using Apache POI

POI로 엑셀 파일 열기

import java.io.File;
import java.io.FileInputStream;

import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class TestPoiMain {
	
	public static void main(String[] args) throws Exception {
		// 
		String fileName = "test1.xlsx";
		//
		File xlsFile = new File(fileName);
		
		Workbook workbook = null;
		try {
			if (xlsFile.exists()) {
				FileInputStream inputStream = new FileInputStream(xlsFile);
				workbook = new XSSFWorkbook(inputStream);

				System.out.println(workbook);
			}
		} finally {
			if (workbook != null)
				workbook.close();
		}
	}
}

POI로 Excel 파일 내에 이미지 추출

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import org.apache.poi.ss.usermodel.ClientAnchor;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFDrawing;
import org.apache.poi.xssf.usermodel.XSSFPicture;
import org.apache.poi.xssf.usermodel.XSSFPictureData;
import org.apache.poi.xssf.usermodel.XSSFShape;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class TestPoiMain {
	
	public static void main(String[] args) throws Exception {
		// 
		String fileName = "test1.xlsx";
		String tarDir = "c:\\test";
		//
		File xlsFile = new File(fileName);
		
		Workbook workbook = null;
		try {
			if (xlsFile.exists()) {
				FileInputStream inputStream = new FileInputStream(xlsFile);
				workbook = new XSSFWorkbook(inputStream);
				
				XSSFSheet sheet = (XSSFSheet) workbook.getSheetAt(0);
				XSSFDrawing drawing = sheet.createDrawingPatriarch(); // I know it is ugly, actually you get the actual instance here
				for (XSSFShape shape : drawing.getShapes()) {
					if (shape instanceof XSSFPicture) {
						XSSFPicture picture = (XSSFPicture) shape;
						
						if (picture.getPictureData()==null) {
							System.out.println("사진 Path 사용");
							continue;
						}
						XSSFPictureData xssfPictureData = picture.getPictureData();
						ClientAnchor anchor = picture.getPreferredSize();
						int row1 = anchor.getRow1();
						int row2 = anchor.getRow2();
						int col1 = anchor.getCol1();
						int col2 = anchor.getCol2();
						System.out.println("Row1: " + row1 + " Row2: " + row2);
						System.out.println("Column1: " + col1 + " Column2: " + col2);
						// Saving the file
						String ext = xssfPictureData.suggestFileExtension();
						byte[] data = xssfPictureData.getData();
						
						FileOutputStream out = new FileOutputStream(String.format("%s\\%s_%d_%d.%s", tarDir, sheet.getSheetName(), row1, col1, ext));
						out.write(data);
						out.close();
					}
				}
			}
		} finally {
			if (workbook != null)
				workbook.close();
		}
	}
}