Merge pull request #1976 from Hccake/bugfix-EncryptedExcelCorrupted

🐛 fix 当进行加密导出时，由于输出流未关闭导致的文件损坏异常

src/main/java/com/alibaba/excel/context/WriteContextImpl.java

@@ -483,6 +483,19 @@ public class WriteContextImpl implements WriteContext {
         POIFSFileSystem fileSystem = new POIFSFileSystem();
         Encryptor encryptor = new EncryptionInfo(EncryptionMode.standard).getEncryptor();
         encryptor.confirmPassword(writeWorkbookHolder.getPassword());
+        OPCPackage opcPackage = null;
+        OutputStream outputStream = null;
+        try {
+            opcPackage = OPCPackage.open(file, PackageAccess.READ_WRITE);
+            outputStream = encryptor.getDataStream(fileSystem);
+            opcPackage.save(outputStream);
+        } finally {
+            if (opcPackage != null) {
+                opcPackage.close();
+            }
+            if (outputStream != null) {
+                outputStream.close();
+            }
         try (OPCPackage opcPackage = OPCPackage.open(file, PackageAccess.READ_WRITE);
              OutputStream outputStream = encryptor.getDataStream(fileSystem)) {
             opcPackage.save(outputStream);