학습데이터 업로드, unzip 로직 진행중

src/main/java/com/kamco/cd/training/common/utils/FIleChecker.java

@@ -5,6 +5,8 @@ import static java.lang.String.CASE_INSENSITIVE_ORDER;
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.io.BufferedReader;
 import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.FileReader;
 import java.io.IOException;
 import java.io.InputStream;
@@ -25,13 +27,17 @@ import java.util.Set;
 import java.util.function.Predicate;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
 import lombok.Getter;
+import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.io.FilenameUtils;
 import org.geotools.coverage.grid.GridCoverage2D;
 import org.geotools.gce.geotiff.GeoTiffReader;
 import org.springframework.util.FileSystemUtils;
 import org.springframework.web.multipart.MultipartFile;
 
+@Slf4j
 public class FIleChecker {
 
   static SimpleDateFormat dttmFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
@@ -492,16 +498,30 @@ public class FIleChecker {
 
   public static boolean multipartChunkSaveTo(
       MultipartFile mfile, String targetPath, int chunkIndex) {
-    File dest = new File(targetPath, String.valueOf(chunkIndex));
 
-    boolean fileUpload = true;
     try {
+      File dir = new File(targetPath);
+      if (!dir.exists()) {
+        dir.mkdirs();
+      }
+
+      File dest = new File(dir, String.valueOf(chunkIndex));
+
+      log.info("chunkIndex={}, uploadSize={}", chunkIndex, mfile.getSize());
+      log.info("savedSize={}", dest.length());
+      // ⭐ 핵심
+      if (dest.exists()) {
+        dest.delete();
+      }
+
+      log.info("after delete={}", dest.length());
       mfile.transferTo(dest);
+
+      return true;
     } catch (IOException e) {
+      log.error("chunk save error", e);
       return false;
     }
-
-    return true;
   }
 
   public static boolean deleteFolder(String path) {
@@ -680,4 +700,59 @@ public class FIleChecker {
       this.lastModified = lastModified;
     }
   }
+
+  public static void unzip(String fileName, String destDirectory) throws IOException {
+    File destDir = new File(destDirectory);
+    if (!destDir.exists()) {
+      destDir.mkdirs(); // 대상 폴더가 없으면 생성
+    }
+
+    String zipFilePath = destDirectory + "/" + fileName;
+
+    try (ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFilePath))) {
+      ZipEntry zipEntry = zis.getNextEntry();
+
+      while (zipEntry != null) {
+        File newFile = newFile(destDir, zipEntry);
+
+        if (zipEntry.isDirectory()) {
+          if (!newFile.isDirectory() && !newFile.mkdirs()) {
+            throw new IOException("디렉토리 생성 실패: " + newFile);
+          }
+
+        } else {
+
+          // 상위 디렉토리가 없는 경우 생성
+          File parent = newFile.getParentFile();
+          if (!parent.exists() && !parent.mkdirs()) {
+            throw new IOException("상위 디렉토리 생성 실패: " + parent);
+          }
+
+          // 실제 파일 쓰기
+          try (FileOutputStream fos = new FileOutputStream(newFile)) {
+            byte[] buffer = new byte[1024];
+            int len;
+            while ((len = zis.read(buffer)) > 0) {
+              fos.write(buffer, 0, len);
+            }
+          }
+        }
+        zipEntry = zis.getNextEntry();
+      }
+      zis.closeEntry();
+    }
+  }
+
+  public static File newFile(File destinationDir, ZipEntry zipEntry) throws IOException {
+    File destFile = new File(destinationDir, zipEntry.getName());
+
+    String destDirPath = destinationDir.getCanonicalPath();
+    String destFilePath = destFile.getCanonicalPath();
+
+    if (!destFilePath.startsWith(destDirPath + File.separator)) {
+      throw new IOException("엔트리가 대상 디렉토리를 벗어남: " + zipEntry.getName());
+    }
+
+    return destFile;
+  }
 }