Searching an input buffer

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Alan - 03 Oct 2007 12:24 GMT

Is there an easy way to search a BufferedInputStream for
occurrence of a string?

I am reading web pages into the stream and wanted to search them
for the occurrence of URLs and certain HTML tags in them. This data
can span multiple lines.

I am new to Java. If there is a better way to accomplish this, I
am open to suggestions.

Thanks, Alan

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Chris - 04 Oct 2007 03:51 GMT

> Is there an easy way to search a BufferedInputStream for
> occurrence of a string?
[quoted text clipped - 7 lines]
>
> Thanks, Alan

There are multiple ways to do it. First, you have wrap the InputStream
in a Reader (an InputStreamReader will do), to convert the bytes to chars.

Once you've done this, you can:

1. Read the whole page into a String and use regular expresions on it.
See java.util.regex.

2. Use a more flexible package like JFlex (http://jflex.de). JFlex is
super powerful and super fast, but there is a learning curve. It's what
I use for this purpose.

3. Use one of the HTML parsers out there, like JTidy or NekoHTML.

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