com.sicheng.common.utils.IOUtils Maven / Gradle / Ivy
/**
* 本作品使用 木兰公共许可证,第2版（Mulan PubL v2） 开源协议，请遵守相关条款，或者联系sicheng.net获取商用授权。
* Copyright (c) 2016 SiCheng.Net
* This software is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
package com.sicheng.common.utils;
import java.io.*;
/**
*
* 标题: IOUtils
*
*
* 描述:
*
*
* 公司: 思程科技 www.sicheng.net
*
*
* @author zhaolei
* @date 2017年9月13日 下午6:05:44
*/
public class IOUtils extends org.apache.commons.io.IOUtils {
/**
* 流转数组 从输入流中读取数据到字节数组，供后续业务使用
*
* @param inputStream
* @return
*/
public static byte[] inputStream2ByteArray(InputStream inputStream) {
if (inputStream == null) {
throw new NullPointerException("inputStream is null");
}
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024 * 4];
int len;
while ((len = inputStream.read(buffer)) > -1) {
baos.write(buffer, 0, len);
}
baos.flush();
return baos.toByteArray();
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
//谁读了流，谁负责关，流被读了就不能再被使用了.
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
}
}
}
}
/**
* 数组转流 把字节数组中的内容读到输入流，供后续业务使用
*
* @param data
* @return
*/
public static InputStream byteArray2InputStream(byte[] data) {
ByteArrayInputStream inputStream = new ByteArrayInputStream(data);
return inputStream;
}
/**
* 输入流转输出流 从输入流中读取数据，再写入到输出流
*
* @param inputStream
* @param outputStream
* @return
*/
public static boolean inputStream2OutStream(InputStream inputStream, OutputStream outputStream) {
if (inputStream == null) {
throw new NullPointerException("inputStream is null");
}
if (outputStream == null) {
throw new NullPointerException("outputStream is null");
}
try {
byte[] buffer = new byte[1024 * 4];
int len;
while ((len = inputStream.read(buffer)) > -1) {
outputStream.write(buffer, 0, len);
}
outputStream.flush();
return true;
} catch (Exception e) {
return false;
} finally {
//谁读了流，谁负责关，流被读了就不能再被使用了
if (inputStream != null) {
try {
// 关闭输入流
inputStream.close();
} catch (IOException e) {
}
}
if (outputStream != null) {
try {
// 关闭输出流
outputStream.close();
} catch (IOException e) {
}
}
}
}
}