ByteArrayInputStream和ByteArrayOutputStream的使用
ByteArrayInputStream需要绑定数据源
ByteArrayInputStream bais=new ByteArrayInputStream(fileByteArray);//fileByteArray为字节数组
ByteArrayOutputStream则不需要绑定数据输出目标:
ByteArrayOutputStream baos= new ByteArrayOutputStream();
进行ByteArrayInputStream和ByteArrayOutputStream的使用,示例代码如下:
package com.wd.IO;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
/**
* 测试字节数组输入(ByteArrayInputStream)和字节数组输出(ByteArrayOutputStream)
* 将文件输入流转化为字节数组
* 将字节数组输出为文件
* @author Steven
*
*/
public class TestByteArrayIO {
public static void main(String[] args) {
// TestByteArrayIO.TestBis();
byte[] testBos = TestByteArrayIO.TestBos();
TestByteArrayIO.TestBis(testBos);
// System.out.println(testBos.length);
}
/*
* 测试ByteArrayInputStream
* 将字节数组输出到文件
* 由控制台进行键盘输入直接输出到文件中保存
*/
public static void TestBis(byte[] fileByteArray){
// BufferedReader SysIn = new BufferedReader(new InputStreamReader(System.in));
int len=-1;
byte[] flush= new byte[1024];
try(/*ByteArrayInputStream bais=new ByteArrayInputStream("assfgghhjkddsdfs".getBytes());*/
ByteArrayInputStream bais=new ByteArrayInputStream(fileByteArray);
/*ByteArrayInputStream bais=new ByteArrayInputStream(SysIn.readLine().getBytes());*/
BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream("C:/Users/Steven/Desktop/1-copy.jpg",true))){
while((len=bais.read(flush))!=-1){
bos.write(flush, 0, len);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/*
* 测试ByteArrayOutputStream
* 将文件转化为字节数组
*/
public static byte[] TestBos(){
byte[] flush=new byte[1024];
int len=-1;
try(BufferedInputStream bis=new BufferedInputStream(
new FileInputStream("C:/Users/Steven/Desktop/1.jpg"));
ByteArrayOutputStream baos= new ByteArrayOutputStream();){
while((len=bis.read(flush))!=-1){
baos.write(flush, 0, len);
}
return baos.toByteArray();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}