filereader

用文件字符流复制.txt文件 代码： package cn.tedu.io.file; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; public class FileCopyText1 { public static void main(String[] args) { //在try块外声明文件字符流对象 FileReader read=null; FileWriter writer=null; try{ //进行对象的初始化 //指明从哪获取数据 read=new FileReader(“D:\1.txt”); //指明往哪存储数据 writer=new FileWriter(“D:\5\4.txt”); //自建缓冲区 char[] cs=new char[1024*1024]; int len=-1;//用于接受获取的字符个数 while ((len=read.read(cs))!=-1){//如果返回值是-1循环结束 //往外写出数据 writer.write(new String(cs,0,len)); //冲刷 writer.flush(); } }catch (IOException e){ }finally { //判断字符输出流对象是否为null

import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.*; import java.util.ArrayList; import java.util.List; public class Test { private static final Logger logger = LoggerFactory.getLogger(Test.class); //读取：FileReader //写入：FileWriter //读取内容 public static String readTxt(File file) throws IOException { // 创建文件 //file.createNewFile(); FileReader fileReader = new FileReader(file); String s = ""; // InputStreamReader in = new InputStreamReader(new FileInputStream(file),"UTF-8"); BufferedReader br = new BufferedReader(fileReader); StringBuffer content = new StringBuffer(); while (