IO流的操作规律。
1. 明确源和目的
源代表输入流: InputStream, Reader
目的代表输出流: OutputStream, Writer
2. 操作数据是否纯文本
纯文本:字符流
非纯文本: 字节流
键盘输入基本模型
BufferedReader br = new BufferedReader((new InputStreamReader(System.in)));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
从文件读取
BufferedReader br = new BufferedReader((new InputStreamReader(new FileInputStream("xxx.txt")));
存入到文件
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("xxx.txt")));
String line;
while((line=br.readLine())!=null)
{
if(line.equals("over"))
break;
bw.write(line);
bw.newLine();
bw.flush();
}