Java InputStream Read Line readLines(final InputStream inputStream)

License

Parameter

Exception

Declaration

public static List<String> readLines(final InputStream inputStream) throws IOException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2014 eBay Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License./*from  w w w . ja v a2s . c  o m*/
 *******************************************************************************/

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

import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

public class Main {
    /** This is a convenience method thread reads an input stream into a
     * List<String>
     *
     * @param inputStream
     * @return
     * @throws IOException
     */
    public static List<String> readLines(final InputStream inputStream) throws IOException {
        final String text = readStream(inputStream);
        StringTokenizer tokenizer = new StringTokenizer(text, "\n\r");

        List<String> list = new ArrayList<String>();

        while (tokenizer.hasMoreElements()) {
            final String line = tokenizer.nextToken();
            list.add(line);
        }
        return list;
    }

    public static String readStream(final InputStream inputStream, boolean autoClose) throws IOException {
        try {
            return readStream(inputStream);
        } finally {
            if (autoClose) {
                try {
                    inputStream.close();
                } catch (Throwable e) {
                }
                ;
            }
        }
    }

    /** This is a convienence method to read text from an input stream into a
     * string.  It will use the default encoding of the OS.
     * It call the underlying readString(InputStreamReader)
     *
     * @param inputStream - InputStream
     * @return String - the text that was read in
     * @throws IOException
     */
    public static String readStream(final InputStream inputStream) throws IOException {
        final InputStreamReader isr = new InputStreamReader(inputStream);
        try {
            return readStream(isr);
        } finally {
            isr.close();
        }
    }

    /** This is a convienence method to read text from a stream into a string.
     * The transfer buffer is 4k and the initial string buffer is 75k.  If
     * this causes a problem, write your own routine.
     *
     * @param isr - InputStreamReader
     * @return String - the text that was read in
     * @throws IOException
     */
    public static String readStream(final InputStreamReader isr) throws IOException {
        StringBuilder sb = new StringBuilder(75000);
        char[] buf = new char[4096];
        int numRead;
        do {
            numRead = isr.read(buf, 0, buf.length);
            if (numRead > 0) {
                sb.append(buf, 0, numRead);
            }
        } while (numRead >= 0);
        final String result = sb.toString();
        return result;
    }
}

Related

1. readLines(ByteArrayInputStream outputSource)
2. readLines(final InputStream in)
3. readLines(final InputStream input, final String encoding)
4. readLines(final InputStream inputStream)
5. readLines(final InputStream is)
6. readlines(final InputStream stream)
7. readLines(InputStream in)