resolve #1386

src/main/java/stirling/software/SPDF/config/FileFallbackTemplateResolver.java

@@ -1,6 +1,7 @@
 package stirling.software.SPDF.config;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.util.Map;
 
 import org.springframework.core.io.Resource;
@@ -11,6 +12,8 @@ import org.thymeleaf.templateresource.ClassLoaderTemplateResource;
 import org.thymeleaf.templateresource.FileTemplateResource;
 import org.thymeleaf.templateresource.ITemplateResource;
 
+import stirling.software.SPDF.model.InputStreamTemplateResource;
+
 public class FileFallbackTemplateResolver extends AbstractConfigurableTemplateResolver {
 
     private final ResourceLoader resourceLoader;
@@ -40,9 +43,10 @@ public class FileFallbackTemplateResolver extends AbstractConfigurableTemplateRe
 
         }
 
-        return new ClassLoaderTemplateResource(
-                Thread.currentThread().getContextClassLoader(),
-                "classpath:/templates/" + resourceName,
-                characterEncoding);
+        InputStream inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("templates/" + resourceName);
+        if (inputStream != null) {
+            return new InputStreamTemplateResource(inputStream, "UTF-8");
+        }
+        return null;
     }
 }

src/main/java/stirling/software/SPDF/model/InputStreamTemplateResource.java

@@ -0,0 +1,45 @@
+package stirling.software.SPDF.model;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+
+import org.thymeleaf.templateresource.ITemplateResource;
+
+public class InputStreamTemplateResource implements ITemplateResource {
+    private InputStream inputStream;
+    private String characterEncoding;
+
+    public InputStreamTemplateResource(InputStream inputStream, String characterEncoding) {
+        this.inputStream = inputStream;
+        this.characterEncoding = characterEncoding;
+    }
+
+    @Override
+    public Reader reader() throws IOException {
+        return new InputStreamReader(inputStream, characterEncoding);
+    }
+
+    @Override
+    public ITemplateResource relative(String relativeLocation) {
+        // Implement logic for relative resources, if needed
+        throw new UnsupportedOperationException("Relative resources not supported");
+    }
+
+    @Override
+    public String getDescription() {
+        return "InputStream resource [Stream]";
+    }
+
+    @Override
+    public String getBaseName() {
+        return "streamResource";
+    }
+
+	@Override
+	public boolean exists() {
+		// TODO Auto-generated method stub
+		return false;
+	}
+}