fix

src/main/java/cn/com/qmth/am/bean/ds/ImageContent.java

@@ -4,22 +4,22 @@ public class ImageContent extends OcrContent {
 
     private String type = "image_url";
 
-    private ImageUrl image_url;
+    private String image_url;
 
     public ImageContent(String image_url) {
         super();
-        this.image_url = new ImageUrl(image_url);
+        this.image_url = image_url;
     }
 
     public String getType() {
         return type;
     }
 
-    public ImageUrl getImage_url() {
+    public String getImage_url() {
         return image_url;
     }
 
-    public void setImage_url(ImageUrl image_url) {
+    public void setImage_url(String image_url) {
         this.image_url = image_url;
     }