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IOUtils.java
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IOUtils.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.galaxy.lemon.common.utils;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.Optional;
/**
* IO 相关工具类
* @author <mailto:eleven.hm@vip.163.com">eleven</a>
* @see
* @since 1.0.0
*/
public class IOUtils extends org.apache.commons.io.IOUtils{
public static final String DEFAULT_CHARSET = "UTF-8";
/**
* InputStreamReader 转 String
* @param reader
* @return
* @throws IOException
*/
public static String toString(Reader reader) throws IOException {
StringBuilder sb = null;
BufferedReader br = new BufferedReader(reader);
String line = null;
while((line = br.readLine()) != null) {
if(sb == null) {
sb = new StringBuilder(line);
} else {
sb.append(ResourceUtils.ENTER_NEW_LINE).append(line);
}
}
return Optional.ofNullable(sb).map(sbb -> sbb.toString()).orElse(null);
}
public static String toStringIgnoreException(InputStream input) {
return toStringIgnoreException(input, DEFAULT_CHARSET);
}
public static String toStringIgnoreException(InputStream input, String encoding) {
try {
return toString(input, encoding);
} catch (IOException e) {
return null;
}
}
/**
*
* @param inputStream
* @return
*/
public static boolean available(InputStream inputStream) throws IOException {
return null != inputStream && inputStream.available() > 0;
}
}