IO流——练习3

package cn.jason.test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Test3 {

 public static void main(String[] args) throws IOException {

  /*
   * 需求3：读取键盘录入的数据，转成大写打印到控制台上。录入over结束
   *
   * 需求4：读取文本文件，将数据按照U8编码保存到文件中
   */
  setInfoPrint();
//  setFileInfo();
 }

 private static void setFileInfo() throws IOException {
  
  //需求4：读取文本文件，将数据按照U8编码保存到文件中
  File file = new File("tempfile\\copy_fos.txt");
  if(!file.exists()){
   file.createNewFile();
  }
   
  BufferedReader bufr = new BufferedReader(new FileReader("tempfile\\fos.txt"));
  BufferedWriter bufw = new BufferedWriter(new FileWriter(file));
    
  String line = null;
  while((line=bufr.readLine())!=null){
   bufw.write(line);
   bufw.write("\r\n");
   bufw.flush();
  }
  
//  byte[] by = new byte[1024];
//  
//  int len = 0;
//  
//  while((len=bufr.read())!=-1){
//   bufw.write(len);
//   bufw.flush();
//  }
  
  
//  BufferedInputStream bufr = new BufferedInputStream(new FileInputStream("tempfile\\img0.jpg"));
//  BufferedOutputStream bufw = new BufferedOutputStream(new FileOutputStream(file));
//  
//  byte[] by = new byte[1024];
//  
//  int len = 0;
//  
//  while((len=bufr.read())!=-1){
//   bufw.write(len);
//   bufw.flush();
//  }
//  
  
  
  /*String str=null;
  
  while((str=bufr.readLine())!=null){
   
   bufw.write(str);
   bufw.flush();
  }
  */
  
  
  bufw.close();
  bufr.close();
 }

 private static void setInfoPrint() throws IOException {
  //需求3：读取键盘录入的数据，转成大写打印到控制台上。录入over结束
  BufferedReader bur = new BufferedReader(new InputStreamReader(System.in));
  BufferedWriter buw = new BufferedWriter(new OutputStreamWriter(System.out));
  
  String line = null;
  while((line=bur.readLine())!=null){
   
   //键盘录入结束标记
   if("over".equals(line)){
    break;      //跳出当前循环 不会在录入  
    }
   buw.write(line+"\n");   
   buw.flush();   
  }  
  buw.close();
  bur.close();
 }

}