package 字节流;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
/*字符流
* FileWriter
* BufferedReader
* BufferedWriter
*
* 字节流
* InputStream
* OutputStream
*
* 想要操作图片数据，这时就要用到字节流
*/
public class FileOutputStreamDemo {
public static void main(String[] args) {
// TODO Auto-generated method stub
//写字节
// FileOutputSteamFun();
//读字节
FileInputSteamFun_3();
}
public static void FileOutputSteamFun(){
FileOutputStream fs = null;
try {
fs = new FileOutputStream("src/fox.txt");
try {
fs.write("abcdeddddd".getBytes());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
try {
fs.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public static void FileInputSteamFun_1(){
FileInputStream fis = null;
try {
fis = new FileInputStream("src/fox.txt");
int ch = 0;
try {
while ((ch=fis.read())!=-1) {
System.out.println((char)(ch));
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
try {
fis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public static void FileInputSteamFun_2(){
FileInputStream fis = null;
try {
fis = new FileInputStream("src/fox.txt");
byte[] buf = new byte[1024];
int len = 0;
// try {
// System.out.println(fis.available());//打印字节数的个数
// } catch (IOException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
try {
while ((len=fis.read(buf))!=-1) {
System.out.println(new String(buf,0,len));
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
try {
fis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public static void FileInputSteamFun_3(){
FileInputStream fis = null;
try {
fis = new FileInputStream("src/fox.txt");
try {
byte[] buf = new byte[fis.available()];
fis.read(buf);
System.out.println(new String(buf));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}//打印字节数的个数
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
try {
fis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
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