java: fix NPE in SeaweedWrite and Makefile env var scope

- Add null check for HttpEntity in SeaweedWrite.multipartUpload()
  to prevent NPE when response.getEntity() returns null
- Fix Makefile test target to properly export SEAWEEDFS_TEST_ENABLED
  by setting it on the same command line as mvn test
- Update docker-compose commands to use V2 syntax (docker compose)
  for consistency with GitHub Actions workflow

other/java/client/src/main/java/seaweedfs/client/SeaweedWrite.java

@@ -2,6 +2,7 @@ package seaweedfs.client;
 
 import com.google.common.base.Strings;
 import com.google.protobuf.ByteString;
+import org.apache.http.HttpEntity;
 import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.entity.mime.HttpMultipartMode;
@@ -192,9 +193,10 @@ public class SeaweedWrite {
 
         try {
             if (response.getStatusLine().getStatusCode() / 100 != 2) {
-                if (response.getEntity().getContentType() != null
-                        && response.getEntity().getContentType().getValue().equals("application/json")) {
-                    throw new IOException(EntityUtils.toString(response.getEntity(), "UTF-8"));
+                HttpEntity entity = response.getEntity();
+                if (entity != null && entity.getContentType() != null
+                        && entity.getContentType().getValue().equals("application/json")) {
+                    throw new IOException(EntityUtils.toString(entity, "UTF-8"));
                 } else {
                     throw new IOException(response.getStatusLine().getReasonPhrase());
                 }

test/java/spark/Makefile

@@ -19,9 +19,8 @@ build:
 test:
 	@if [ -z "$$SEAWEEDFS_TEST_ENABLED" ]; then \
 		echo "Setting SEAWEEDFS_TEST_ENABLED=true"; \
-		export SEAWEEDFS_TEST_ENABLED=true; \
 	fi
-	mvn test
+	SEAWEEDFS_TEST_ENABLED=true mvn test
 
 test-local:
 	@echo "Testing against local SeaweedFS (localhost:8888)..."
@@ -29,12 +28,12 @@ test-local:
 
 test-docker:
 	@echo "Running tests in Docker..."
-	docker-compose up --build --abort-on-container-exit spark-tests
-	docker-compose down
+	docker compose up --build --abort-on-container-exit spark-tests
+	docker compose down
 
 docker-up:
 	@echo "Starting SeaweedFS in Docker..."
-	docker-compose up -d seaweedfs-master seaweedfs-volume seaweedfs-filer
+	docker compose up -d seaweedfs-master seaweedfs-volume seaweedfs-filer
 	@echo "Waiting for services to be ready..."
 	@sleep 5
 	@echo "SeaweedFS is ready!"
@@ -43,7 +42,7 @@ docker-up:
 
 docker-down:
 	@echo "Stopping SeaweedFS Docker containers..."
-	docker-compose down -v
+	docker compose down -v
 
 run-example:
 	@echo "Running example application..."