您能否建议如何处理这些情况？我知道在第二个例子中，它很少发生在 unix 上，是吗？如果访问权限没问题。该文件甚至不会被创建。我不明白为什么 IOException 存在，无论它是否被创建，我们为什么要打扰 IOException ？
但在第一个例子中，会有一个损坏的僵尸文件。现在如果你告诉用户再次上传它，同样的事情可能会发生。如果你不能这样做，并且输入流没有标记。你丢失了你的数据？我真的不喜欢在 Java 中如何做到这一点，我希望 Java 7 中的新 IO 更好
删除它是不是很正常
public void inputStreamToFile(InputStream in, File file) throws SystemException {
OutputStream out;
try {
out = new FileOutputStream(file);
} catch (FileNotFoundException e) {
throw new SystemException("Temporary file created : " + file.getAbsolutePath() + " but not found to be populated", e);
}
boolean fileCorrupted = false;
int read = 0;
byte[] bytes = new byte[1024];
try {
while ((read = in.read(bytes)) != -1) {
out.write(bytes, 0, read);
}
} catch (IOException e) {
fileCorrupted = true;
logger.fatal("IO went wrong for file : " + file.getAbsolutePath(), e);
} finally {
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
if(fileCorrupted) {
???
}
}
}
public File createTempFile(String fileId, String ext, String root) throws SystemException {
String fileName = fileId + "." + ext;
File dir = new File(root);
if (!dir.exists()) {
if (!dir.mkdirs())
throw new SystemException("Directory " + dir.getAbsolutePath() + " already exists most probably");
}
File file = new File(dir, fileName);
boolean fileCreated = false;
boolean fileCorrupted = false;
try {
fileCreated = file.createNewFile();
} catch (IOException e) {
fileCorrupted = true;
logger.error("Temp file " + file.getAbsolutePath() + " creation fail", e);
} finally {
if (fileCreated)
return file;
else if (!fileCreated && !fileCorrupted)
throw new SystemException("File " + file.getAbsolutePath() + " already exists most probably");
else if (!fileCreated && fileCorrupted) {
}
}
}