字符缓冲流BufferedWriter BufferedReader

Posted 2021-11-09 qurui1998

//字符缓冲流主要用于文本数据的高速写入

package cn.lijun.demo1;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;

public class BufferedReaderDemo {
    
    public static void main(String[] args) throws Exception {
        //创建字符输入缓冲流对象
        BufferedReader bf=new BufferedReader(new FileReader("d:\\b.txt"));
        String len=null;
        while((len=bf.readLine())!=null){
            System.out.println(len);
        }
        bf.close();
    }

}


//字节输出缓冲流
package cn.lijun.demo1;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

public class BufferedWriterDemo {
    public static void main(String[] args) throws IOException {
        //创建字符输出流 封装文件
        FileWriter fw=new FileWriter("d:\\b.txt");
        BufferedWriter bw = new BufferedWriter(fw);
        
        bw.write("您好");
        bw.newLine();     //换行
        bw.write(100);
        bw.flush();
        bw.write("adasfdsf");
        bw.close();
        
    }

}