package io;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* 1. File -> Program -> Byte Array
* File Input Stream, Byte Array Output Stream
*
* 2. Byte Array -> Program -> File
* File Output Stream, Byte Array Input Stream
* @author Lenovo
*
*/
public class Text2 {
public static void main(String[] args) throws IOException {
byte[] str=getbyteformat("D:/src/po.jpg");
setbytrform(str,"D:/src/a.jpg");
}
/**
* 2.字节数组--->程序---->文件
* 文件输出流，字节数组输入流
* @param src
* @param path
* @throws IOException
*/
public static void setbytrform(byte[] src,String path) throws IOException {
//创建目的地
File file1=new File(path);
//选择流
InputStream oInputStream=new BufferedInputStream(new ByteArrayInputStream(src));
OutputStream oStream=new BufferedOutputStream(new FileOutputStream(file1));
byte[] bt=new byte[1024];
int len=0;
while((len=oInputStream.read(bt))!=-1) {
oStream.write(bt, 0, len);
}
oStream.flush();
oInputStream.close();
oStream.close();
}
/**
* 1.文件--->程序--->字节数组
* 文件输入流，字节数组输出流
* @param str
* @return
* @throws IOException
*/
public static byte[] getbyteformat(String str) throws IOException {
//创建文件源
File file=new File(str);
//创建字节数组目的地
byte[] byt=null;
//选择流
InputStream stream=new BufferedInputStream(new FileInputStream(file));
//字节数组输出流
ByteArrayOutputStream outputStream=new ByteArrayOutputStream();
byte[] bete=new byte[1024];
int len=0;
while((len=stream.read(bete))!=-1) {
outputStream.write(bete, 0, len);
}
outputStream.flush();
byt=outputStream.toByteArray();
stream.close();
outputStream.close();
return byt;
}
}