原文連結:https://www.cnblogs.com/DreamDrive/p/7389672.html

1.出現這個bug的大體邏輯程式碼如下:

1     private static void findMovieId() throws Exception {
2         File resultFile = new File("C:\\2016.txt");
3         
4         OutputStreamWriter outputStreamWriter = new OutputStreamWriter(new FileOutputStream(resultFile));
5         BufferedWriter bufferWriter = new BufferedWriter(outputStreamWriter);
6         
7         outputStreamWriter.close();
8         bufferWriter.close();
9     }

2.報錯大體資訊如下:

 3.解決方式:

原因:

bufferwriter流使用了outputStreamWriter流，所以關閉bufferwriter流也會關閉outputStreamWriter流； 但是下面有使用outputStreamWriter流，相當於使用一個關閉了的流。解決辦法是換下位置就可以了.

程式碼改為:

    private static void findMovieId() throws Exception {
        File resultFile = new File("C:\\2016.txt");
        
        OutputStreamWriter outputStreamWriter = new OutputStreamWriter(new FileOutputStream(resultFile));
        BufferedWriter bufferWriter = new BufferedWriter(outputStreamWriter);

        bufferWriter.close();        
        outputStreamWriter.close();
    }

同理:FileWriter和BufferWriter之間的關係:

            FileWriter fileWriter=new FileWriter(file);
            BufferWriter bufferWriter=new BufferedWriter(fileWriter);

這裡關閉流要從大到小關閉,BufferWriter包裝了FileWriter,BufferWriter"大",FileWriter"小"
FileWriter.close();
BufferWriter.close();
這樣的順序就是不行，FileWriter流自己關閉了。然後BufferWriter流又把FileWriter流關閉一次就會報錯java.io.IOException: Stream closed.