Java InputStream Read Line readLinesUntil(InputStream br, String ln)

Description

read Lines Until

License

Apache License

Declaration

public static final String readLinesUntil(InputStream br, String ln)
        throws Exception 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.IOException;
import java.io.InputStream;

public class Main {

    public static final String readLinesUntil(InputStream br, String ln)
            throws Exception {
        return readLinesUntil(br, ln, null);
    }/*from  w w w.j a v a 2s.  com*/

    public static final String readLinesUntil(InputStream br, String ln,
            String charset) throws Exception {
        StringBuffer result = new StringBuffer();
        String s = readLine(br, charset);
        while ((s != null) && !s.equals(ln)) {
            result.append(s);
            s = readLine(br, charset);
            if ((s != null) && !s.equals(ln))
                result.append("\r\n");
        }
        return result.toString();
    }

    public static final String readLine(InputStream in) throws IOException {
        return readLine(in, null);
    }

    public static final String readLine(InputStream in, String charset)
            throws IOException {
        int rd = in.read();
        if (rd == -1)
            return null;
        byte r = (byte) rd;
        int i = 0;
        int l = 50;
        byte[] buf = new byte[l];
        while (r != '\n') {
            if (i >= l - 1) {
                l += 50;
                byte[] old = buf;
                buf = new byte[l];
                System.arraycopy(old, 0, buf, 0, old.length);
            }
            if (r != '\r')
                buf[i++] = r;
            rd = in.read();
            if (rd == -1)
                break;
            r = (byte) rd;
        }
        if (charset == null) {
            return new String(buf, 0, i);
        }
        return new String(buf, 0, i, charset);
    }
}

Related

1. readLineSet(InputStream stream)
2. readLinesStream(InputStream is, boolean trim)
3. readLineString(InputStream is)
4. readLineStringBuilder(InputStream is)
5. readLineStringConcat(InputStream is)