字符流缓冲区原理之装饰模式

标签：ret   buffered   auth   line   reader   port   nts   错误   main   

/**

• 模拟字符流缓冲区 readline（）
• 装饰模式
• @author WangShuang

• */
  public class Demo {

  public static void main(String[] args) {
  MyBufferedReader my = null;
  try {
  FileReader fr = new FileReader("c:\字符流缓冲区.txt");
  my = new MyBufferedReader(fr);
  String buff = null;
  while((buff = my.myReadLine())!=null){
  System.out.println(buff);
  }
  } catch (Exception e) {
  throw new RuntimeException("读取错误");
  }finally {
  try {
  if(my!=null)
  my.close();
  } catch (IOException e) {
  e.printStackTrace();
  }
  }

  }
  }
  class MyBufferedReader extends Reader {
  Reader in = null;
  public MyBufferedReader(Reader in) {
  this.in = in;
  }
  //增强的方法
  public String myReadLine() throws IOException{
  StringBuffer sb = new StringBuffer();
  int ch = 0;
  while((ch = in.read())!=-1){
  if(ch == ‘\r‘)
  continue;
  if(ch== ‘\n‘)
  return sb.toString();
  else
  sb.append((char)ch);
  }
  if(sb.length()!=0){
  return sb.toString();
  }
  return null;br/>}
  @Override
  public int read(char[] cbuf, int off, int len) throws IOException {
  return in.read(cbuf, off, len);br/>}
  @Override
  public void close() throws IOException {
  in.close();

  }

字符流缓冲区原理之装饰模式

标签：ret   buffered   auth   line   reader   port   nts   错误   main   

原文地址：http://blog.51cto.com/13579086/2064987