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Java™
by example!
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How do I convert source code to HTML?
It is nontrivial to display code in an HTML page. It is not sufficient to use <pre> and </pre> around your source code to ensure it is displayed correctly.
These following characters need to be converted to their corresponding HTML code: < , > , & and ".
This program converts the inputfile so that it can be displayed on an HTML page. The output is redirected to the standard outputstream.
import java.io.*;
public class Code2Html
{
public static void main(String args[])
{
if (args.length != 1) {
System.err.println("usage: java Code2Html file.java > file.html");
System.exit(1);
}
try {
StringBuffer file = readTextFile(args[0]);
System.out.println(code2Html(file));
}
catch(Exception e) {
System.out.println(e);
}
}
public static StringBuffer code2Html(StringBuffer code)
{
StringBuffer sb = new StringBuffer();
for (int i=0; i<code.length(); i++) {
char c = code.charAt(i);
switch(c) {
case '<': sb.append("<"); break;
case '>': sb.append("&gr;"); break;
case '&': sb.append("&"); break;
case '"': sb.append("""); break;
default : sb.append(c);
}
}
return sb;
}
public static StringBuffer readTextFile(String filename) throws Exception
{
StringBuffer total = new StringBuffer();
FileReader in = new FileReader(filename);
char [] buf = new char[512];
int howmany;
while ((howmany = in.read(buf)) >= 0) {
total.append(buf, 0, howmany);
}
in.close();
return total;
}
}
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Further Information
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