RemoveHTMLReaderpublic class RemoveHTMLReader extends FilterReader | A simple FilterReader that strips HTML tags (or anything between
pairs of angle brackets) out of a stream of characters. |
| Fields Summary |
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| boolean | intag |
| Constructors Summary |
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public RemoveHTMLReader(Reader in)A trivial constructor. Just initialize our superclass super(in);
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| Methods Summary |
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| public int | read(char[] buf, int from, int len)This is the implementation of the no-op read() method of FilterReader.
It calls in.read() to get a buffer full of characters, then strips
out the HTML tags. (in is a protected field of the superclass). // Used to remember whether we are "inside" a tag
int numchars = 0; // how many characters have been read
// Loop, because we might read a bunch of characters, then strip them
// all out, leaving us with zero characters to return.
while (numchars == 0) {
numchars = in.read(buf, from, len); // Read characters
if (numchars == -1) return -1; // Check for EOF and handle it.
// Loop through the characters we read, stripping out HTML tags.
// Characters not in tags are copied over previous tags
int last = from; // Index of last non-HTML char
for(int i = from; i < from + numchars; i++) {
if (!intag) { // If not in an HTML tag
if (buf[i] == '<") intag = true; // check for tag start
else buf[last++] = buf[i]; // and copy the character
}
else if (buf[i] == '>") intag = false; // check for end of tag
}
numchars = last - from; // Figure out how many characters remain
} // And if it is more than zero characters
return numchars; // Then return that number.
| | public int | read()This is another no-op read() method we have to implement. We
implement it in terms of the method above. Our superclass implements
the remaining read() methods in terms of these two.
char[] buf = new char[1];
int result = read(buf, 0, 1);
if (result == -1) return -1;
else return (int)buf[0];
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