//示例1,file基本操作

import java.io.File;
import java.io.IOException;
class FileDemo{
 public static void main(String args[]){
  try{
   File file=new File("file1.txt");
   
   System.out.println("文件是否存在: "+file.exists());
   
   System.out.println("是文件嗎: "+file.isFile());
   
   System.out.println("是文件夾嗎: "+file.isDirectory());
   
   System.out.println("是否隱藏: "+file.isHidden());
   
   System.out.println("名稱: "+file.getName());
   System.out.println("標(biāo)準(zhǔn)文件名: "+file.getCanonicalFile());
   
   System.out.println("相對(duì)路徑: "+file.getPath());  
   System.out.println("絕對(duì)路徑: "+file.getAbsolutePath());
   System.out.println("標(biāo)準(zhǔn)路徑: "+file.getCanonicalPath());
    
   System.out.println("最后修改時(shí)間: "+file.lastModified());
   
   System.out.println("文件大小: "+file.length()+" 字節(jié)"); 
   
    
  }
  
  catch(IOException ex){
   ex.printStackTrace();
  }   
 }
}

//示例2,簡(jiǎn)單讀寫操作

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.FileReader;
import java.io.IOException;
class BufferedReaderAndBufferedWriterTest{
 public static void main(String args[]){
  try{
   FileWriter fw=new FileWriter("file1.txt");
   BufferedWriter bw=new BufferedWriter(fw);
   bw.write("大家好,我正在學(xué)習(xí)Java");
   bw.newLine();
   bw.write("請(qǐng)多多指教");
   System.out.println("file1.txt寫入成功!***************開始讀..\n");
   bw.flush();
   bw.close();
   
   FileReader fr=new FileReader("file1.txt");
   BufferedReader br=new BufferedReader(fr);
   String temp=null;
   do{
    temp=br.readLine();
    System.out.println(temp==null?"":temp);
   }
   while(temp!=null);
   fr.close();
   br.close();
   
   System.out.println("file1.txt已經(jīng)讀完!***************");
  }
  
  catch(IOException ex){
   ex.printStackTrace();
  }   
 }
}

轉(zhuǎn)貼網(wǎng)址：http://blog./user14/73186/archives/2006/2909.shtml