java中IO字符缓冲流的使用

java中IO字符缓冲流的使用

字符缓冲流的基础使用

/*
* 字符缓冲流
* BufferedWriter和BufferedReader
* */

import java.io.*;

public class Buffer {
    public static void main(String[] args) throws IOException {
        /*
        * 构造方法源码
        * public BufferedReader(Reader in) {
            this(in, defaultCharBufferSize);
        }
        *
        * public BufferedWriter(Writer out) {
            this(out, defaultCharBufferSize);
        }
    *  */
        BufferedReader br = new BufferedReader(new FileReader("java基础\\src\\com\\io\\buffer\\chars\\java.txt"));
        BufferedWriter bw = new BufferedWriter(new FileWriter("java基础\\src\\com\\io\\buffer\\chars\\java.txt"));

        // 写入数据
        bw.write("你好");
        // 刷新数据
        bw.flush();

        // 读取数据
        char[] chars = new char[1024];
        int length;
        while ((length = br.read(chars)) != -1){
            System.out.println(new String(chars,0,length));
        }

        // 关闭资源
        bw.close();
        br.close();
    }
}

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使用字符缓冲流进行复制java文件

/*
 *  使用字符缓冲流
 *  将Before.java复制到Copy.java
 * */

import java.io.*;

public class Demo {
    public static void main(String[] args) throws IOException {
        // 数据源
        BufferedReader br = new BufferedReader(new FileReader("java基础\\src\\com\\io\\buffer\\chars\\copy\\Before.java"));
        // 目标
        BufferedWriter bw = new BufferedWriter(new FileWriter("java基础\\src\\com\\io\\buffer\\chars\\copy\\Copy.java"));

        // 读取数据源
        char[] chars = new char[1024];
        int readLength;
        while ((readLength = br.read(chars)) != -1){
            // 写入数据
            bw.write(chars,0,readLength);
        }

        // 关闭资源
        bw.close();
        br.close();
    }
}

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