java.io.IOException: Stream closed

原文链接:https://www.cnblogs.com/DreamDrive/p/7389672.html

1.出现这个bug的大体逻辑代码如下:

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.报错大体信息如下:

 

 3.解决方式:

原因:

bufferwriter流使用了outputStreamWriter流，所以关闭bufferwriter流也会关闭outputStreamWriter流； 但是下面有使用outputStreamWriter流，相当于使用一个关闭了的流。解决办法是换下位置就可以了.

代码改为:

    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之间的关系:

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

 

这里关闭流要从大到小关闭,BufferWriter包装了FileWriter,BufferWriter"大",FileWriter"小"
FileWriter.close();
BufferWriter.close();
这样的顺序就是不行，FileWriter流自己关闭了。然后BufferWriter流又把FileWriter流关闭一次就会报错java.io.IOException: Stream closed.