错误：只能遍历数组或java.lang.Iterable的实例 [英] Error: can only iterate over an array or an instance of java.lang.Iterable

问题描述

请帮我看看我的错误似乎无法使其工作，因为它只能迭代一个数组或一个java.lang.Iterable的实例。我想创建一个条形码并读取它，并将其添加到word文档中。

Update Post nodeCollection来自com.aspose.words 。

  import com.aspose.barcode。*; 
 import com.aspose.barcoderecognition.BarCodeReadType; 
 import com.aspose.barcoderecognition.BarCodeReader; 
 import com.aspose.words.Document; 
 import com.aspose.words.DocumentBuilder; 
 import com.aspose.words.ImageType; 
 import com.aspose.words.NodeCollection; 
 import com.aspose.words.NodeType; 
 import com.aspose.words.Shape; 
 
尝试
 {
 //生成条形码图片
 BarCodeBuilder builder = new BarCodeBuilder（）; 
 builder.setSymbologyType（Symbology.Code39Standard）; 
 builder.setCodeText（test-123）; 
 String strBarCodeImageSave =img.jpg; 
 builder.save（strBarCodeImageSave）; 
 
 //将图像添加到Word文档
 Document doc = new Document（）; 
 DocumentBuilder docBuilder = new DocumentBuilder（doc）; 
 docBuilder.insertImage（strBarCodeImageSave）; 
 String strWordFile =docout.doc; 
 doc.save（strWordFile）; 
 
 //识别部分
 //从Word文档中提取图像
 NodeCollection< Shape> shapes = doc.getChildNodes（NodeType.SHAPE，true，false）; 
 int imageIndex = 0; 
 
（shape shape：shapes）
 {
 if（shape.hasImage（））
 {
 //如果这个图形是一个图像，将图像提取到文件
 String extension = ImageTypeToExtension（shape.getImageData（）。getImageType（））; 
 String imageFileName = MessageFormat.format（Image.ExportImages。{0} Out。{1}，imageIndex，extension）; 
 String strBarCodeImageExtracted =+ imageFileName; 
 shape.getImageData（）。save（strBarCodeImageExtracted）; 
 $ b $ //识别这张图片的条形码
 BarCodeReader reader = new BarCodeReader（（BufferedImage）Toolkit.getDefaultToolkit（）。getImage（strBarCodeImageExtracted），BarCodeReadType.Code39Standard）; （读者。读（））
 {
 System.out.println（codetext：+ reader.getCodeText（））; 
} 
 imageIndex ++; 
 
 
 $ b catch（Exception ex）
 {
 System.out.println（ex.getMessage（））; 
 
 
 
 private static String ImageTypeToExtension（int imageType）throws Exception 
 {
 switch（imageType）
 {
 case ImageType.BMP：
 returnbmp; 
 case ImageType.EMF：
 returnemf; 
 case ImageType.JPEG：
 returnjpeg; 
 case ImageType.PICT：
 returnpict; 
 case ImageType.PNG：
 returnpng; 
 case ImageType.WMF：
返回wmf; 
默认值：
抛出新的异常（未知图像类型）; 
 
}} 
  

解决方案

我假设Nodecollection是一个com.aspose.words.NodeCollection。

如果你想使用foreach语法，你最好这样做：

  Node [] shapesArray = shapes.toArray（）; 
 for（Node node：shapesArray）{... 
  

please help me with my error can't seem to make it work because of that can only iterate over an array or an instance of java.lang.Iterable. i want to create a barcode and read it and add it to the word document

Update Post the nodeCollection is from the com.aspose.words.

import com.aspose.barcode.*;
import com.aspose.barcoderecognition.BarCodeReadType;
import com.aspose.barcoderecognition.BarCodeReader;
import com.aspose.words.Document;
import com.aspose.words.DocumentBuilder;
import com.aspose.words.ImageType;
import com.aspose.words.NodeCollection;
import com.aspose.words.NodeType;
import com.aspose.words.Shape;

              try
        {
            // Generate barcode image
            BarCodeBuilder builder = new BarCodeBuilder();
            builder.setSymbologyType(Symbology.Code39Standard);
            builder.setCodeText("test-123");
            String strBarCodeImageSave = "img.jpg";
            builder.save(strBarCodeImageSave);

            // Add the image to a Word doc
            Document doc = new Document();
            DocumentBuilder docBuilder = new DocumentBuilder(doc);
            docBuilder.insertImage(strBarCodeImageSave);
            String strWordFile = "docout.doc";
            doc.save(strWordFile);

            // Recognition part
            // Extract image from the Word document
            NodeCollection<Shape> shapes = doc.getChildNodes(NodeType.SHAPE, true, false);
            int imageIndex = 0;

            for(Shape shape: shapes)
            {   
                if (shape.hasImage())
                {
                    // If this shape is an image, extract image to file
                    String extension = ImageTypeToExtension(shape.getImageData().getImageType());
                    String imageFileName = MessageFormat.format("Image.ExportImages.{0} Out.{1}", imageIndex, extension);
                    String strBarCodeImageExtracted = "" + imageFileName;
                    shape.getImageData().save(strBarCodeImageExtracted);

                    // Recognize barcode from this image
                    BarCodeReader reader = new BarCodeReader((BufferedImage) Toolkit.getDefaultToolkit().getImage(strBarCodeImageExtracted),BarCodeReadType.Code39Standard);
                    while (reader.read())
                    {
                        System.out.println("codetext: " + reader.getCodeText());
                    }
                    imageIndex++;
                }
            }
        }
        catch(Exception ex)
        {
            System.out.println(ex.getMessage());
        }
    }

    private static String ImageTypeToExtension(int imageType) throws Exception
    {
        switch (imageType)
        {
            case ImageType.BMP:
                return "bmp";
            case ImageType.EMF:
                return "emf";
            case ImageType.JPEG:
                return "jpeg";
            case ImageType.PICT:
                return "pict";
            case ImageType.PNG:
                return "png";
            case ImageType.WMF:
                return "wmf";
            default:
                throw new Exception("Unknown image type.");
        }
    }}

解决方案

I assume Nodecollection is a com.aspose.words.NodeCollection.

If you want to use the foreach syntax you better do:

Node[] shapesArray = shapes.toArray();
for (Node node : shapesArray ){ ...

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