| /*
|
| * Copyright 1999-2011 Alibaba Group.
|
| *
|
| * 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.
|
| */
|
| package com.alibaba.dubbo.common.utils; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.OutputStream; |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| import java.io.Reader; |
| import java.io.StringReader; |
| import java.io.StringWriter; |
| import java.io.Writer; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class IOUtils |
| { |
| private static final int BUFFER_SIZE = 1024 * 8; |
| |
| private IOUtils() {} |
| |
| /** |
| * write. |
| * |
| * @param is InputStream instance. |
| * @param os OutputStream instance. |
| * @return count. |
| * @throws IOException. |
| */ |
| public static long write(InputStream is, OutputStream os) throws IOException |
| { |
| return write(is, os, BUFFER_SIZE); |
| } |
| |
| /** |
| * write. |
| * |
| * @param is InputStream instance. |
| * @param os OutputStream instance. |
| * @param bufferSize buffer size. |
| * @return count. |
| * @throws IOException. |
| */ |
| public static long write(InputStream is, OutputStream os, int bufferSize) throws IOException |
| { |
| int read; |
| long total = 0; |
| byte[] buff = new byte[bufferSize]; |
| while( is.available() > 0 ) |
| { |
| read = is.read(buff, 0, buff.length); |
| if( read > 0 ) |
| { |
| os.write(buff, 0, read); |
| total += read; |
| } |
| } |
| return total; |
| } |
| |
| /** |
| * read string. |
| * |
| * @param reader Reader instance. |
| * @return String. |
| * @throws IOException. |
| */ |
| public static String read(Reader reader) throws IOException |
| { |
| StringWriter writer = new StringWriter(); |
| try |
| { |
| write(reader, writer); |
| return writer.getBuffer().toString(); |
| } |
| finally{ writer.close(); } |
| } |
| |
| /** |
| * write string. |
| * |
| * @param writer Writer instance. |
| * @param string String. |
| * @throws IOException. |
| */ |
| public static long write(Writer writer, String string) throws IOException |
| { |
| Reader reader = new StringReader(string); |
| try{ return write(reader, writer); }finally{ reader.close(); } |
| } |
| |
| /** |
| * write. |
| * |
| * @param reader Reader. |
| * @param writer Writer. |
| * @return count. |
| * @throws IOException. |
| */ |
| public static long write(Reader reader, Writer writer) throws IOException |
| { |
| return write(reader, writer, BUFFER_SIZE); |
| } |
| |
| /** |
| * write. |
| * |
| * @param reader Reader. |
| * @param writer Writer. |
| * @param bufferSize buffer size. |
| * @return count. |
| * @throws IOException. |
| */ |
| public static long write(Reader reader, Writer writer, int bufferSize) throws IOException |
| { |
| int read; |
| long total = 0; |
| char[] buf = new char[BUFFER_SIZE]; |
| while( ( read = reader.read(buf) ) != -1 ) |
| { |
| writer.write(buf, 0, read); |
| total += read; |
| } |
| return total; |
| } |
| |
| /** |
| * read lines. |
| * |
| * @param file file. |
| * @return lines. |
| * @throws IOException. |
| */ |
| public static String[] readLines(File file) throws IOException |
| { |
| if( file == null || !file.exists() || !file.canRead() ) |
| return new String[0]; |
| |
| return readLines(new FileInputStream(file)); |
| } |
| |
| /** |
| * read lines. |
| * |
| * @param is input stream. |
| * @return lines. |
| * @throws IOException. |
| */ |
| public static String[] readLines(InputStream is) throws IOException |
| { |
| List<String> lines = new ArrayList<String>(); |
| BufferedReader reader = new BufferedReader(new InputStreamReader(is)); |
| try |
| { |
| String line; |
| while( (line = reader.readLine()) != null ) |
| lines.add(line); |
| return lines.toArray(new String[0]); |
| } |
| finally |
| { |
| reader.close(); |
| } |
| } |
| |
| /** |
| * write lines. |
| * |
| * @param os output stream. |
| * @param lines lines. |
| * @throws IOException. |
| */ |
| public static void writeLines(OutputStream os, String[] lines) throws IOException |
| { |
| PrintWriter writer = new PrintWriter(new OutputStreamWriter(os)); |
| try |
| { |
| for( String line : lines ) |
| writer.println(line); |
| writer.flush(); |
| } |
| finally |
| { |
| writer.close(); |
| } |
| } |
| |
| /** |
| * write lines. |
| * |
| * @param file file. |
| * @param lines lines. |
| * @throws IOException. |
| */ |
| public static void writeLines(File file, String[] lines) throws IOException |
| { |
| if( file == null ) |
| throw new IOException("File is null."); |
| writeLines(new FileOutputStream(file), lines); |
| } |
| |
| /** |
| * append lines. |
| * |
| * @param file file. |
| * @param lines lines. |
| * @throws IOException. |
| */ |
| public static void appendLines(File file, String[] lines) throws IOException |
| { |
| if( file == null ) |
| throw new IOException("File is null."); |
| writeLines(new FileOutputStream(file, true), lines); |
| } |
| |
| } |