一、代码如下
package www.wujianbotwo;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
public class Demo09 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Demo09 demo09= new Demo09();
demo09.byteRead();
}
private void byteRead() {
try {
File file= new File("D:\\Test.txt");
InputStream in= new FileInputStream(file);
byte[] buf= new byte[(int)file.length()];
in.read(buf);
in.close();
for(byte b: buf) {
System.out.println(b);
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
package www.wujianbotwo;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class Demo09 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Demo09 demo09= new Demo09();
//demo09.byteRead();
demo09.byteWrite();
demo09.byteWriteFalse();
}
private void byteRead() {
try {
File file= new File("D:\\Test.txt");
InputStream in= new FileInputStream(file);
byte[] buf= new byte[(int)file.length()];
in.read(buf);
in.close();
for(byte b: buf) {
System.out.println(b);
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void byteWrite() {
try {
File file= new File("D:\\Test.txt");
OutputStream out= new FileOutputStream(file, true);
String content= "这是文件内容。\r\n";
byte[] buf= content.getBytes();
out.write(buf, 0, buf.length);
out.close();
System.out.println("输入成功！！");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void byteWriteFalse() {
try {
File file= new File("D:\\Test.txt");
OutputStream out= new FileOutputStream(file, false);
String content= "这是文件内容。\r\n";
byte[] buf= content.getBytes();
out.write(buf, 0, buf.length);
out.close();
System.out.println("输入成功！！");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
