1 2
3 import java.io.File;
4 import java.io.FileInputStream;
5 import java.io.FileOutputStream;
6 import java.io.InputStream;
7 import java.io.OutputStream;
8 import java.util.Scanner;
9
10 public class TestFile {
11
12 public static void main(String[] args) throws Exception {
13 File f=new File("D:"+File.separator+"tt.txt");
14 //write
15 OutputStream out=new FileOutputStream(f,true);
16 Scanner reader=new Scanner(System.in);
17 StringBuffer sb=new StringBuffer();
18 System.out.println("Enter String end with 'save'");
19 String s=reader.nextLine();
20 while(!s.equals("save")){
21
22 sb.append(s+"\r\n"); // \r\n增加换行
23 s=reader.nextLine();
24 }
25 byte[] b=sb.toString().getBytes();
26 out.write(b);
27
28 //read
29 InputStream in=new FileInputStream(f);
30 byte r[]=new byte[(int) f.length()];
31 int len=in.read(r);
32 System.out.println(new String(r,0,len));
33 }
34
35 }
