diff --git a/library/src/main/ets/components/imageknife/Downsampling/Downsampler.ets b/library/src/main/ets/components/imageknife/Downsampling/Downsampler.ets
index 568ab4a..2bf9a9e 100644
--- a/library/src/main/ets/components/imageknife/Downsampling/Downsampler.ets
+++ b/library/src/main/ets/components/imageknife/Downsampling/Downsampler.ets
@@ -1,8 +1,8 @@
 /*
  * asdfasdfasdfasdfasdf*/
 import { CenterOutside, FitCenter, SampleSizeRounding } from './Downsamplestrategy';
-import { FileTypeutil } from '../../utits/Fitetypeutit';
-import { Request0ption } from '../../Requestoption';
+import { FileTypeUtil } from '../../utits/Fitetypeutit';
+import { RequestOption } from '../../Requestoption';
 let TAG = 'downsampling'
 export class Downsampler {
   calculateScaling(
@@ -37,9 +37,10 @@ export class Downsampler {
     let exactScaleFactor: number = FitCenter.getScaleFactor(orientedSourceWidth, orientedSourceHeight, targetWidth, targetHeight)
     if (exactScaleFactor <= 0) {
       throw new Error("Cannot	round	with exactScaleFactor");
+    }
       console.log('exactScaleFactor', exactScaleFactor)
       /*安卓的模式*/
-      let rounding: SampleSizeRounding = Center0utside.getSampleSizeRounding(orientedSourceWidth, orientedSourceHeight, targetWidth, targetHeight)
+      let rounding: SampleSizeRounding = CenterOutside.getSampleSizeRounding(orientedSourceWidth, orientedSourceHeight, targetWidth, targetHeight)
       if (rounding == null) {
         throw new Error("Cannot round with null rounding");
       }
@@ -118,8 +119,9 @@ export class Downsampler {
     round(value: number): number {
       return Math.floor(value +0.5);
     }
-    isRotationRequired(degreesToRotate: number): boolean{
+    isRotationRequired(degreesToRotate: number): boolean {
       return degreesToRotate == 90 || degreesToRotate == 270;
+    }
       // isScaling(options: ESObject): boolean {
       //	return options.inTargetDensity >0
       //	&& options.inDensity>0
@@ -135,4 +137,4 @@ export class Downsampler {
         let difference = adjustedScaleFactor / scaleFactorWithError;
         return this.round(difference * targetDensity);
       }
-    }
\ No newline at end of file
+  }
\ No newline at end of file