安卓:打开失败:ENOENT(没有这样的文件或目录) [英] Android: open failed: ENOENT (No such file or directory)

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问题描述

你好我试图读取资产脱颖而出,并希望将其转换成JSON,但我得到的错误:打开失败:ENOENT(没有这样的文件或目录)后,搜查了许多SO问题但无法找到解决方案
下面是我的code

 公共无效readXlsFileAndConvertToJsonObject(){
     JSONArray jsonArray =新JSONArray();
     JSONArray mainJsonArray =新JSONArray();
     尝试{         档案文件=新的文件(文件:///android_asset/filters.xls);
         FIS的FileInputStream =新的FileInputStream(文件);
         //最后的FileInputStream文件=新的FileInputStream(新文件(filters.xls));         诠释计数= 0;
         //获取XLS文件的工作簿实例
         HSSFWorkbook工作簿=新HSSFWorkbook(FIS);         //从工作簿中第一张
         HSSFSheet片= workbook.getSheetAt(0);         //通过从第一张各行迭代
         迭代器<行> rowIterator = sheet.iterator();
         而(rowIterator.hasNext()){
             鳞次栉比= rowIterator.next();
             //LOGGER.info(\"count是+计数);
             如果(计数== 0 ||计数== 1){}其他{
                 尝试{
                     JSONObject的jsonMaterialObject =新的JSONObject();
                     // 名称
                     jsonMaterialObject.put(姓名,row.getCell(0)
                         的ToString());
                     //厚内斯
                     jsonMaterialObject.put(厚度,row.getCell(4)
                         的ToString());
                     // RATING_1
                     jsonMaterialObject.put(RATING_1,row.getCell(5)
                         的ToString());
                     // rating_2
                     jsonMaterialObject.put(rating_2,row.getCell(6)
                         的ToString());                     jsonMaterialObject.put(low_frequency_rank,排
                         .getCell(7)的ToString());                     jsonMaterialObject.put(medium_frequency_rank,排
                         .getCell(8)的ToString());                     jsonMaterialObject.put(high_frequency_rank,排
                         .getCell(9)的ToString());                     //添加文件大小
                     最终文件DIR =新的文件(文件:/// android_asset /文件名);
                     最终文件[] = ListFiles dir.listFiles();
                     布尔发现= FALSE;
                     如果(ListFiles.length == 0){}其他{
                         对于(文件å文件:ListFiles){
                             的System.out.println(å文件名称+ aFile.getName());
                             的System.out.println(从JSON文件名的文件+ row.getCell(0)的ToString());
                             如果(aFile.getName()。equalsIgnoreCase(
                                     row.getCell(0)的ToString()+.PDF)){
                                 jsonMaterialObject.put(档案大小,truncateDecimal(aFile.length()/ 1024,2));
                                 发现= TRUE;
                             }
                             如果(找到){
                                 打破;
                             }
                         }                         jsonMaterialObject.put(pdfFileName,排
                             .getCell(0)的ToString()+.PDF);
                     }                     jsonArray.put(jsonMaterialObject);
                 }赶上(JSONException E){
                     // TODO自动生成catch块
                     e.printStackTrace();
                 }
             }
             算上++;         }
         ((可关闭)文件).close();     }赶上(FileNotFoundException异常五){}赶上(IOException异常五){}
     createMaterialJson(jsonArray.toString(),finalfile.json);
 }

我提到的权限如下

 <使用许可权的android:NAME =android.permission.READ_EXTERNAL_STORAG​​E/>
    <使用许可权的android:NAME =android.permission.ACCESS_NETWORK_STATE/>
    <使用许可权的android:NAME =android.permission.WRITE_EXTERNAL_STORAG​​E/>

下面是我的跟踪

  12月11日至25日:32:35.535:我/的System.out(20019):异常的readXlsFileAndConvertToJsonObject /file:/android_asset/filters.xls计提坏账:打开失败:ENOENT(无这样的文件或目录)


解决方案

此问题浪费了我个小时的时间:P

彻底记录检查的文件名。

此问题是配备了一个带数字的一些文件名。

我通过改变文件名解决了这个。

Hi i am trying to read excel from assets and wanted to convert it into JSON, But i am getting the error: open failed:ENOENT(No such file or directory), searched many SO questions but could not find the solution Below is my code

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");
 }

I mentioned the permissions as below

<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"/>

Below is my Trace

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)

解决方案

This issue wasted my hours of time :P

Thoroughly check your file names by Logging.

This issue is comes with some file names with digits.

I solved this by changing the file name.

这篇关于安卓:打开失败:ENOENT(没有这样的文件或目录)的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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