import java.io.File;

import java.io.FileOutputStream;

public class FileTest {

public static void main(String[] args) {

File file=new File("word.txt");

try {

FileOutputStream out=new FileOutputStream(file);

byte buy[]="心怀梦想，永不言弃，勿忘初心，砥砺前行".getBytes();

out.write(buy);

out.close();

}catch(Exception e) {

e.printStackTrace();

}

try {

FileOutputStream out=new FileOutputStream(file);

byte byt[]=new byte[1024];

int len=in.read(byt);

System.out.println("文中的信息是"+new String(byt,0,len));

in.close();

}catch(Exception e) {

e.printStackTrace();

}

}

}