java.io.IOException: No such file or directory

 異常資訊

java.io.IOException: No such file or directoryat java.io.FileOutputStream.writeBytes(Native Method)at java.io.FileOutputStream.write(FileOutputStream.java:247)at com.nstc.framework.web.util.jsloader.JsFileModelMgrTest.testGetJs(JsFileModelMgrTest.java:53)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)at java.lang.reflect.Method.invoke(Method.java:585)at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)

 

異常原因

出現此類異常的情境就太多了，這隻是其中一種原因，當建立完成檔案流執行個體然後這裡使用了FileChannel，通過NIO對檔案內容進行操作，操作完成之後把FileChannel關閉，這裡嘗試寫就會拋錯了。

代碼

    @Test    public void testGetJs() {        jfmmInst.doLoaderJs();        FileOutputStream fous = null;        FileChannel fileChannel = null;        try {            fous = new FileOutputStream(testFile, false);            fileChannel = fous.getChannel();            jfmmInst.doRestoreIO("ExtExtension", fileChannel);            fileChannel.close();            fous.write("HelloWorld\n".getBytes());        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException ioe) {            ioe.printStackTrace();        } finally {            if (fous != null) {                try {                    fous.close();                } catch (IOException ioe) {                    ioe.printStackTrace();                }            }        }    }