public class TsetWiteTeade {
public static void main(String[] args) {
TsetWiteTeade tw = new TsetWiteTeade();
tw.writeToFileRead(new File("D:\\a学习\\javaIO\\IO.txt"));
}
public void writeToFileRead(File file) {
RandomAccessFile raf = null;
Scanner sc = null;
try {
raf = new RandomAccessFile(file, "rw");
raf.setLength(0); //清空文件内容
sc = new Scanner(System.in);
String str = null;
int len = 0;
System.out.println("请输入要写入文件的内容(以#号结束):");
byte[] datas = null;
while (!(str = sc.nextLine()).equals("#")) {
datas = str.getBytes(); //转字节,防止中文乱码
raf.write(datas);
raf.write("\n".getBytes()); //设置转行,将"\n"转字符
}
System.out.println("写入成功");
raf.seek(0);//设置指针到最前,因为前面写入会让指针指向末尾
while (raf.getFilePointer() < raf.length()) {
len = raf.read(datas);
System.out.println(new String(datas,0,len));
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
if (raf != null) {
try {
raf.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (sc != null) {
sc.close();
}
}
}
}