fileinputstreame和fileoutputstream

将string转化为流

public class Main {
    public static void main(String[] args) {
        String text = "Example on how to convert a String to an InputStream";

        try {
            InputStream is = new ByteArrayInputStream(text.getBytes());

            int byteRead;
            while ((byteRead = is.read()) != -1) {
                System.out.print((char)byteRead);
            }
            System.out.println();
            is.close();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

http://blog.youkuaiyun.com/caixiexin/article/details/6719407

1. import java.io.FileInputStream;  
2. import java.io.FileOutputStream;  
3. import java.io.IOException;  
4. class IODemo  
5. {  
6.     public static void main(String[] args)   
7.     {  
8.         try  
9.         {  
10.         //使用FileInputStream和FileOutputStream进行文件复制  
11.         FileInputStream fis=new FileInputStream("a.txt");  
12.         FileOutputStream fos=new FileOutputStream("b.txt");  
13.             int read;  
14.             //read=fis.read();  
15.             byte b[]=new byte[1024];  
16.             //读取文件，存入字节数组b，返回读取到的字符数，存入read,默认每次将b数组装满  
17.             read=fis.read(b);  
18.             while(read!=-1)  
19.             {  
20.                 fos.write(b,0,read);  
21.                 read=fis.read(b);  
22.                 //read=fis.read();  
23.             }  
24.             fis.close();  
25.             fos.close();  
26.         }  
27.         catch (IOException e)  
28.         {  
29.             e.printStackTrace();  
30.         }  
31.           
32.     }  
33. }