//用BufferedReader类,我想你应该看的懂
String dz="D:\\myedipsework\\ajax\\WebRoot\\update.txt";
InputStream in=new FileInputStream(dz);//
BufferedReader in2=new BufferedReader(new InputStreamReader(in));
String y="";
while((y=in2.readLine())!=null){//一行一行读
System.out.println(y);
}
inputstream 里面有 readline 这个方法,就可以读取一行