io流
output
input
写输出 读输入
字节流:
output
Stream(内存——文件),
input
Stream(文件——内存)(直接进行操作)
字符流:Read,Write(先缓存在操作)
对内容按行读用字符流
简单的输入流
package com.lenvov.io; import java.io.*; public class InputOutput { public static void main(String[] args) { // TODO Auto-generated method stub try { FileInputStream input=new FileInputStream("d:/lenovo/hello.txt"); FileOutputStream output=new FileOutputStream("d:/lenovo/study/log.txt"); int n=input.read(); while(n>-1){ output.write(n); n=input.read(); } input.close(); output.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
简单的输出流
package com.lenvov.io; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; public class NewOutputStream { public static void main(String[] args){ // TODO Auto-generated method stub try { FileOutputStream out=new FileOutputStream("d:/lenovo/hello.txt"); String s="1213"; out.write(s.getBytes()); out.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }