115 lines
3.3 KiB
Java
115 lines
3.3 KiB
Java
/*
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* Copyright 2015 Hippo Seven
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.hippo.yorozuya;
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import java.io.ByteArrayOutputStream;
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import java.io.Closeable;
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import java.io.EOFException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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public final class IOUtils {
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private static final int EOF = -1;
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private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
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private IOUtils() {
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}
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/**
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* Close the closeable stuff. Don't worry about anything.
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*
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* @param is the closeable stuff
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*/
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public static void closeQuietly(Closeable is) {
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try {
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if (is != null) {
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is.close();
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}
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} catch (IOException e) {
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// Ignore
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}
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}
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/**
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* Copy bytes from an <code>InputStream</code> to an
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* <code>OutputStream</code>.
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*
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* @param input the InputStream
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* @param output the OutputStream
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* @return the number of bytes copied
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* @throws IOException
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*/
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public static long copy(InputStream input, OutputStream output)
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throws IOException {
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byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
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long count = 0;
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int n;
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while (EOF != (n = input.read(buffer))) {
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output.write(buffer, 0, n);
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count += n;
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}
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return count;
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}
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/**
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* Returns the ASCII characters up to but not including the next "\r\n", or
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* "\n".
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*
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* @throws java.io.EOFException if the stream is exhausted before the next
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* newline character.
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*/
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public static String readAsciiLine(final InputStream in) throws IOException {
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final StringBuilder result = new StringBuilder(80);
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while (true) {
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final int c = in.read();
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if (c == -1) {
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throw new EOFException();
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} else if (c == '\n') {
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break;
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}
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result.append((char) c);
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}
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final int length = result.length();
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if (length > 0 && result.charAt(length - 1) == '\r') {
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result.setLength(length - 1);
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}
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return result.toString();
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}
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public static String readString(final InputStream is, String encoding) throws IOException {
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InputStreamReader reader = new InputStreamReader(is, encoding);
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StringBuilder sb = new StringBuilder();
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char[] buffer = new char[DEFAULT_BUFFER_SIZE];
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int n;
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while (EOF != (n = reader.read(buffer))) {
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sb.append(buffer, 0, n);
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}
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return sb.toString();
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}
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public static byte[] getAllByte(InputStream is) throws IOException {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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copy(is, baos);
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return baos.toByteArray();
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}
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}
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