java _io_字符缓冲流的输入、输出

新增方法: 输入: BufferedReader breader=new BufferedReader(Reader reader); .readLine()读取一行内容，返回字符串 输出: BufferedWriter bwriter=new BufferedWirter(Writer writer); .newLine() 写入一个换行符

输入: File f =new File("C:\Users\10853\eclipse-workspace\hell\src\hell\abc"); BufferedReader reader=null; try {

		reader=new BufferedReader(new FileReader(f));
		
		String line=null;
		while((line=reader.readLine())!=null)//要添上!=null，不像c语言赋值表达式整个也有个真假结果
		{
			System.out.println(line);
		}
	}catch(FileNotFoundException e)
	{
		e.printStackTrace();
	}catch(IOException e)
	{
		e.printStackTrace();
	}finally {
		
		try {
			if(null!=reader)
			{
				reader.close();
			}
		}catch(IOException e)
		{
			e.printStackTrace();
		}
	}

输出:

	File f=new File("D:d/c.txt");
	
	BufferedWriter bwriter=null;
	try
	{
		bwriter=new BufferedWriter(new FileWriter(f));
		
		String s="addad";
		bwriter.write(s);
		bwriter.newLine();
		bwriter.append("aaaff");
		bwriter.flush();
	}catch(FileNotFoundException e)
	{
		e.printStackTrace();
	}catch(IOException e)
	{
		e.printStackTrace();
	}finally {
		try {
			if(null!=bwriter)
			{
				bwriter.close();
			}
		}catch(IOException e)
		{
			e.printStackTrace();
		}	
	}