2019-09-02今天是周一,应该是学校升国旗开学典礼的一天吧~
然而垃圾的我还是没有找到工作,大专狗是真的没用~简历也不会看你的呀~
在之前我自己也mark了字节和字符的流,但是呢读取数据量比较大时,速度是8是会有点慢?影响到你郭良俊自己的脾气呢?
好了~那就在内存/不怕被坑情况下自己弄一下呗~好了马记录起~
缓冲流,根据流的分类:字节缓冲流和字符缓冲流。目的可能提高IO流的读写速度,至于利弊嘛-->出门右拐-->百度/谷歌走起~
字节缓冲流:BufferedInputStream、BufferedOutputStream
字符缓冲流:BufferedReader、BufferedWriter
它们的内部都包含了一个缓冲区,通过缓冲区读写,就可以提高了IO流的读写速度,做到缓存的作用~
字节缓冲流例子
String destFile = "D:"+File.separator+"destfile.txt"; String lineSeparator = System.getProperty("line.separator"); //字节缓冲输出流 try(FileOutputStream fos = new FileOutputStream(destFile,true); BufferedOutputStream bos = new BufferedOutputStream(fos)) { bos.write(lineSeparator.getBytes()); bos.write("hello FileOutputStream".getBytes()); //使用try-with-resources优雅关闭资源(https://199604.com/1241) //bos.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } //字节缓冲输入流 try { FileInputStream fis = new FileInputStream(destFile); BufferedInputStream bis = new BufferedInputStream(fis); byte[] buffer = new byte[1024]; int len = -1; while ((len = bis.read(buffer))!=-1){ System.out.println(new String(buffer,0,len)); } fis.close(); bis.close(); } catch (FileNotFoundException e) { e.printStackTrace(); }catch (IOException e1){ e1.printStackTrace(); }
字符缓冲流例子
tring destFile = "D:"+File.separator+"destfile.txt"; String lineSeparator = System.getProperty("line.separator"); //字符输出流 try(BufferedWriter out = new BufferedWriter(new FileWriter(destFile,true))){ out.write("郭大傻?"); out.write(lineSeparator); out.write("结束~"); //使用try-with-resources优雅关闭资源(https://199604.com/1241) //out.close(); } catch (IOException e) { e.printStackTrace(); } //字符输入流 try(BufferedReader in = new BufferedReader(new FileReader(destFile))) { String line = null; while ((line= in.readLine())!=null){ System.out.println(line); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }
一位辣鸡的菜鸡mark结束系列~