InputStream must not be null错误的上下文环境,是在文件读取、网络通信还是其他I/O操作中。 检查InputStream的初始化或赋值: 查看代码中InputStream对象的创建和赋值过程。例如,如果InputStream是从文件、网络资源或其他来源获取的,确保这些来源是可用的,并且在尝试读取之前已经正确初始化了InputStream。确保在使用前已...
Assert.state(is!=null,"Resource InputStream must not be null");try{longsize =0;byte[] buf =newbyte[255];intread;while((read =is.read(buf)) !=-1) { size += read; }returnsize; }finally{try{is.close(); }catch(IOException ex) { } } 已经读完了流,导致会报错,其实InputStreamResourc...
InputStream is = getInputStream(); Assert.state(is != null, "Resource InputStream must not be null"); try { long size = 0; byte[] buf = new byte[255]; int read; while ((read = is.read(buf)) != -1) { size += read; } return size; } finally { try { is.close(); } ...
This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. Methods 展开表 Available() Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking, which may be 0, or 0 when...
This has the effect of constructing a CipherInputStream using a NullCipher. Note: if the specified input stream is null, a NullPointerException may be thrown later when it is used. Parameters: Parameter Name Parameter Description is the to-be-processed input stream Method Detail read public...
* @exception IOException If the first byte cannot be read for any reason * other than end of file, or if the input stream has been closed, or if * some other I/O error occurs. * @exception NullPointerException If <code>b</code> is <code>null</code>. ...
n- the number of bytes to be skipped. Returns: the actual number of bytes skipped. Throws: IOException- if the stream does not support seek, or if some other I/O error occurs. available public int available() throwsIOException Returns an estimate of the number of bytes that can be read...
fis- file input stream; must not be null. Upon successful construction the input stream will be automatically marked at the current position of the given file input stream. Note the creation of aResettableInputStreamwould entail physically opening a file. If the opened file is meant to be clos...
It is not permitted to replace a non-null filter with a null filter. If the current filter is non-null, the value returned from the filter factory must be non-null. The filter's checkInput method is called for each class and reference in the stream. The filter can check any or all...
*/ private long contentLength = -1; private MessageBytes contentTypeMB = null; private Charset charset = null; // Retain the original, user specified character encoding so it can be // returned even if it is invalid private String characterEncoding = null; /** * Is there an expectation ...