不正確的文件路徑

Question

我不知道爲什麼，但outStream = new FileOutputStream(file)和inStream = new FileInputStream(new File(file1.getName()))拋出異常。我不知道該怎麼做。

這裏是這樣的代碼：

 File tempf = new File(cmds[1]); //cmds is a String with filename cmds[1] and pathname cmds[2] where to move the file 
     File tempw = new File(cmds[2]); 
     if(!tempf.isAbsolute() || !tempw.isAbsolute()){//here i make paths absolute 
      tempf = new File(tempf.getAbsolutePath()); 
      tempw = new File(tempw.getAbsolutePath()); 
     } 
     String from = cmds[1]; 
     String where = cmds[2]; 
     File file1 = tempf; 
     File file2 = new File (tempw.toString() + "/" + new File(cmds[1]).getName()); 
     InputStream inStream = null; 
     OutputStream outStream = null; 
     try { 
      inStream = new FileInputStream(new File(file1.getName())); //throws an exception 
      outStream = new FileOutputStream(file2); //throws an exception too 
      byte[] buffer = new byte[16384]; 
      int length; 
      while ((length = inStream.read(buffer)) > 0) { 
       outStream.write(buffer, 0, length); 
      } 

      if (inStream != null) 
       inStream.close(); 
      if (outStream != null) 
       outStream.close(); 
      file1.delete(); 

     } catch (IOException e) { 
      System.err.println("permission denied"); 
     } 
    } else { 
     System.err.println("incorrect syntax"); 
    } 
    continue; 
} 

看起來一切都應該工作正常，但事實並非如此。我越來越

java.io.FileNotFoundException: C:\Users\Maxim\IdeaProjects\Testing\OneDrive\1234.txt 

但是，正如我所看到的是錯誤的道路。真正的路徑是C:\Users\Maxim\OneDrive

UPD！發現問題是getAbsolutePath()返回項目所在的路徑，但它不是我需要的路徑。我需要C:\Users\Maxim\OneDrive但它返回C:\Users\Maxim\IdeaProjects\Testing\OneDrive但是！ .../Testng沒有OneDrive！

Answer 1

FileInputStream和FileOutputStream的構造函數在訪問文件時存在問題（如不存在）會拋出錯誤。要阻止它拋出FileNotFoundException，請確保在實例化FileInput/OutputStream對象之前創建該文件。

try{ 
    FileInputStream fis = new FileInputStream(file); 
}catch(FileNotFoundException e){ 
    e.printStackTrace(); 
} 

請看文檔here。