JAVA基础复习-输入、输出字符缓冲流整合（实现复制文本文件）

BufferedReader

BufferedWriter

package com.winson.iotest;

import org.junit.Test;

import java.io.*;

/**
 * @description：输入、输出字符缓冲流整合（实现复制文本文件）
 * @date： 2020/7/5 21:32
 * @author： winson
 */
public class BufferedReadBufferedWriterTest {

    @Test
    public void test1() {
        BufferedReader bufferedReader = null;
        BufferedWriter bufferedWriter = null;
        try {
            File srcFile = new File("hello.txt");
            File desFile = new File("hello_out.txt");

            FileReader fileReader = new FileReader(srcFile);
            FileWriter fileWriter = new FileWriter(desFile);

            bufferedReader = new BufferedReader(fileReader);
            bufferedWriter = new BufferedWriter(fileWriter);
//            方式一
//            char[] chars = new char[1024];
//            int len;
//            while ((len = bufferedReader.read(chars)) != -1) {
//                bufferedWriter.write(chars, 0, len);
//            }
//            方式二
            String data;
            while ((data = bufferedReader.readLine()) != null) {
//                写入方式一
//                bufferedWriter.write(data + "\n");
//                写入方式二
                bufferedWriter.newLine();
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                bufferedWriter.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                bufferedReader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}