Question

您好我正在尝试从资源中读取excel并希望将其转换为JSON，但我收到错误：打开失败：ENOENT（没有此类文件或目录），搜索了许多SO问题但找不到解决方案以下是我的代码

public void readXlsFileAndConvertToJsonObject() {
     JSONArray jsonArray = new JSONArray();
     JSONArray mainJsonArray = new JSONArray();
     try {

         File file = new File("file:///android_asset/filters.xls");
         FileInputStream fis = new FileInputStream(file);
         //final FileInputStream file = new FileInputStream(new File("filters.xls"));

         int count = 0;
         // Get the workbook instance for XLS file
         HSSFWorkbook workbook = new HSSFWorkbook(fis);

         // Get first sheet from the workbook
         HSSFSheet sheet = workbook.getSheetAt(0);

         // Iterate through each rows from first sheet
         Iterator < Row > rowIterator = sheet.iterator();
         while (rowIterator.hasNext()) {
             Row row = rowIterator.next();
             //LOGGER.info("count is " + count);
             if (count == 0 || count == 1) {} else {
                 try {
                     JSONObject jsonMaterialObject = new JSONObject();
                     // Name
                     jsonMaterialObject.put("name", row.getCell(0)
                         .toString());
                     // thick ness
                     jsonMaterialObject.put("thickness", row.getCell(4)
                         .toString());
                     // rating_1
                     jsonMaterialObject.put("rating_1", row.getCell(5)
                         .toString());
                     // rating_2
                     jsonMaterialObject.put("rating_2", row.getCell(6)
                         .toString());

                     jsonMaterialObject.put("low_frequency_rank", row
                         .getCell(7).toString());

                     jsonMaterialObject.put("medium_frequency_rank", row
                         .getCell(8).toString());

                     jsonMaterialObject.put("high_frequency_rank", row
                         .getCell(9).toString());

                     // Add file size
                     final File dir = new File("file:///android_asset/filename");
                     final File[] ListFiles = dir.listFiles();
                     boolean found = false;
                     if (ListFiles.length == 0) {} else {
                         for (File aFile: ListFiles) {
                             System.out.println("Afile Name " + aFile.getName());
                             System.out.println("A file from json  Name " + row.getCell(0).toString());
                             if (aFile.getName().equalsIgnoreCase(
                                     row.getCell(0).toString() + ".pdf")) {
                                 jsonMaterialObject.put("fileSize", truncateDecimal(aFile.length() / 1024, 2));
                                 found = true;
                             }
                             if (found) {
                                 break;
                             }
                         }

                         jsonMaterialObject.put("pdfFileName", row
                             .getCell(0).toString() + ".pdf");
                     }

                     jsonArray.put(jsonMaterialObject);
                 } catch (JSONException e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                 }
             }
             count++;

         }
         ((Closeable) file).close();

     } catch (FileNotFoundException e) {} catch (IOException e) {}
     createMaterialJson(jsonArray.toString(), "finalfile.json");
 }

我提到了以下权限

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

以下是我的追踪

11-25 12:32:35.535: I/System.out(20019): Exception accured in readXlsFileAndConvertToJsonObject /file:/android_asset/filters.xls: open failed: ENOENT (No such file or directory)

Answer 1

这个问题浪费了我的时间：P

通过记录彻底检查您的文件名。

此问题附带一些带数字的文件名。

我通过更改文件名解决了这个问题。

Answer 2

使用getAssets().open("filter.xls")（它返回一个InputStream）。在上下文或活动中调用此方法。在某些情况下，只有这对我有用。

Android：打开失败：ENOENT（没有这样的文件或目录）

2 个答案: