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POJava fast stream copy with ISO-8859-1
 

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  1. POJava fast stream copy with ISO-8859-1
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    <p>I have the following code, which will read in files in ISO-8859-1, as thats what is required in this application, </p> <pre><code>private static String readFile(String filename) throws IOException { String lineSep = System.getProperty("line.separator"); File f = new File(filename); StringBuffer sb = new StringBuffer(); if (f.exists()) { BufferedReader br = new BufferedReader( new InputStreamReader( new FileInputStream(filename), "ISO-8859-1")); String nextLine = ""; while ((nextLine = br.readLine()) != null) { sb.append(nextLine+ " "); // note: BufferedReader strips the EOL character. // sb.append(lineSep); } br.close(); } return sb.toString(); } </code></pre> <p>The problem is it is pretty slow. I have this function, which is MUCH faster, but I can not seem to find how to place the character encoding:</p> <pre><code>private static String fastStreamCopy(String filename) { String s = ""; FileChannel fc = null; try { fc = new FileInputStream(filename).getChannel(); MappedByteBuffer byteBuffer = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size()); int size = byteBuffer.capacity(); if (size &gt; 0) { byteBuffer.clear(); byte[] bytes = new byte[size]; byteBuffer.get(bytes, 0, bytes.length); s = new String(bytes); } fc.close(); } catch (FileNotFoundException fnfx) { System.out.println("File not found: " + fnfx); } catch (IOException iox) { System.out.println("I/O problems: " + iox); } finally { if (fc != null) { try { fc.close(); } catch (IOException ignore) { } } } return s; } </code></pre> <p>Any one have an idea of where i should be putting the ISO encoding?</p>
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    1. USrecursive9
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    1. COWhy are you talking about "stream copy" in your title and method name? There's only one stream involved.
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      1. USJoachim Sauer
    2. COSince you appear to just be reading all the lines, why not use the **java.nio.file.Files** class method **readAllLines(Path path, Charset cs)**?
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      1. USJere
 

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