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package com.video.utils;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
/**
* 流转换工具类
* @author yule.zhang
*
*/
public class IOUtils {
/**
* InputStream 转化成 ByteArrayOutputStream
* InputStream 适用于FileInputStream,ByteArrayInputStream,DataInputStream
* @param inputStream
*/
public static ByteArrayOutputStream inputStreamToByteArrayOutputStream(InputStream inputStream) {
ByteArrayOutputStream byteArrayOutputStream = null;
try {
byteArrayOutputStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int n;
while ((n = inputStream.read(buffer)) != -1) {
byteArrayOutputStream.write(buffer, 0, n);
}
}catch(Exception e) {
e.printStackTrace();
}
return byteArrayOutputStream;
}
/**
* ByteArrayOutputStream 转化成 byte[]
* @param byteArrayOutputStream
* @return
*/
public static byte[] byteArrayOutputStreamTOByte(ByteArrayOutputStream byteArrayOutputStream) {
byte[] bytes = null;
try {
bytes = byteArrayOutputStream.toByteArray();
}catch(Exception e) {
e.printStackTrace();
}
return bytes;
}
/**
* byte [] 转化成 ByteArrayInputStream
* @param bytes
* @return
*/
public static ByteArrayInputStream byteToByteArrayInputStream(byte [] bytes) {
ByteArrayInputStream byteArrayInputStream = null;
try {
byteArrayInputStream = new ByteArrayInputStream(bytes);
}catch(Exception e) {
e.printStackTrace();
}
return byteArrayInputStream;
}
}