Java文本文档的读写操作（复习笔记）

package com.xing.test;

import java.io.*;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
/**
 * 
 * @author LiuYinxing
 *
 */
public class T5
{
 public static void main(String args[])throws Exception
 {
	 HashMap<Integer, LinkedList<String>> readtxt = new HashMap<>();
     File file = new File("file.txt");//Text文件
     BufferedReader br = new BufferedReader(new FileReader(file));//构造一个BufferedReader类来读取文件
     String s = null;
     int lin = 0;
     while((s = br.readLine())!=null)
      {//使用readLine方法，一次读一行
         System.out.println(s);
         LinkedList<String> strings = new LinkedList<>();
         String[] temp = s.toString().split(" ");
         for (int i = 0; i < temp.length; i++) 
         {
			strings.add(temp[i]);
		 }
         readtxt.put(lin, strings);
         lin++;
      }
      br.close();
      for (int i = 0; i < readtxt.size(); i++) 
      {
    	  Iterator<String> iter = readtxt.get(i).iterator();
          while (iter.hasNext()) 
          {
        	   System.out.print(iter.next()+",");
          }
          System.out.println();
	 }
    
 }
}

package com.xing.test;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
/**
 * 
 * @author LiuYinXing
 *
 */
public class T2 
{ 
    public void dbToFile() throws Exception{    	
    	BufferedWriter bufferedWriter=null;	
    	String teString = "我爱你  程序员";
    	String filepath = "D:\\1.txt";
    	File file = new File(filepath);  	
    	try 
    	{
    	 bufferedWriter = new  BufferedWriter(new OutputStreamWriter(new FileOutputStream(file)));	    	
    	 bufferedWriter.write(teString);
		 bufferedWriter.newLine();									
		} 
    	catch (FileNotFoundException e) 
		{
			e.printStackTrace();
		}
    	finally
    	{
     		bufferedWriter.close();
    	}	
	} 	
	public static void main(String[] args) throws Exception
	{	
		T2 dbToFile =new T2();
		dbToFile.dbToFile();
	}
}