FileInputStream fis = new FileInputStream("abc.txt");
// // readLine() 只读了一行
// BufferedReader br = new BufferedReader(new InputStreamReader(fis));
while(br.readLine()!=null) {
System.out.println(br.readLine());
String context=br.readLine(); //读取文件中的一行
while (context!=null) {
System.out.println(context); //输出读取的内权容
context=br.readLine();
}