package com.io;

 import java.io.*;

 /**

  * 文件字符流的读取

  * @author ganhang

  *

  */

 public class FileReaderDemo {

     public static void read(){

         File file =new File("1.txt");

         try {

             FileReader fr=new FileReader(file);

             StringBuffer sb=new StringBuffer();

             char [] cbuf=new char[10];

             int len=-1;

             while((len=fr.read(cbuf))!=-1){

                 sb.append(cbuf,0,len);

             }

             fr.close();

             System.out.println(sb);

         } catch (FileNotFoundException e) {

             e.printStackTrace();

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

     public static void main(String[] args) {

         read();

     }

 }

 package com.io;

 import java.io.*;

 /**

  * 文件字符流的写入

  * @author ganhang

  *

  */

 public class FileWriterDemo {

     public static void write(){

         File file =new File("1.txt");

         try {

             FileWriter fr = new FileWriter(file,true);

             String str="哈哈哈哈";

             fr.write(str);

             fr.close();

             System.out.println("写入成功！");

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

     public static void main(String[] args) {

         write();

     }

 }