Fixed code bugs

Author: qianmoQ

src/main/java/org/devlive/sdk/openai/entity/ImageEntity.java

@@ -14,6 +14,8 @@
 import org.devlive.sdk.openai.model.ImageFormatModel;
 import org.devlive.sdk.openai.model.ImageSizeModel;
 
+import java.util.Arrays;
+
 @Data
 @Builder
 @ToString
@@ -108,7 +110,7 @@ public ImageEntityBuilder size(ImageSizeModel size)
         {
             Object instance = EnumUtils.getEnum(ImageSizeModel.class, size.name());
             if (ObjectUtils.isEmpty(instance)) {
-                throw new ParamException(String.format("Invalid size: %s , Must be one of %s", size, ImageSizeModel.values()));
+                throw new ParamException(String.format("Invalid size: %s , Must be one of %s", size, Arrays.toString(ImageSizeModel.values())));
             }
             this.size = size.getName();
             return this;
@@ -118,7 +120,7 @@ public ImageEntityBuilder format(ImageFormatModel format)
         {
             Object instance = EnumUtils.getEnum(ImageFormatModel.class, format.name());
             if (ObjectUtils.isEmpty(instance)) {
-                throw new ParamException(String.format("Invalid format: %s , Must be one of %s", format, ImageFormatModel.values()));
+                throw new ParamException(String.format("Invalid format: %s , Must be one of %s", format, Arrays.toString(ImageFormatModel.values())));
             }
             this.format = format.name();
             return this;

src/main/java/org/devlive/sdk/openai/utils/MultipartBodyUtils.java

@@ -8,7 +8,7 @@
 
 public class MultipartBodyUtils
 {
-    public final static MediaType TYPE = MediaType.parse("multipart/form-data");
+    public static final MediaType TYPE = MediaType.parse("multipart/form-data");
 
     private MultipartBodyUtils()
     {