缓冲流

BufferedInputStream

package test;
import java.io.*;
public class Test {
    public static void main(String[] args) {
        File fs = new File("./aaa.txt");
        try {
            FileInputStream input = new FileInputStream(fs);
            BufferedInputStream bs = new BufferedInputStream(input);
            // 用法跟其他的一样
            int code = bs.read();
            bs.close();
            bs.read(byte[]);
            bs.skip();
            bs.available()
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

BufferedOutputStream

package test;
import java.io.*;
public class Test {
    public static void main(String[] args) {
        File fs = new File("./aaa.txt");
        try {
            FileOutputStream input = new FileOutputStream(fs);
            BufferedOutputStream bs = new BufferedOutputStream(input);
            // 用法跟其他的一样 
            bs.write();
            bs.flush();
            bs.close();
            bs.write(byte[]);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

BufferedReader

package test;
import java.io.*;
public class Test {
    public static void main(String[] args) {
        File fs = new File("./aaa");
        try {
            FileReader reader = new FileReader(fs);
            BufferedReader br = new BufferedReader(reader);
            String str = br.readLine();
            while (str != null){
                System.out.println(str);
                str = br.readLine(); // 可以读一行， 其他的方法一样
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

BufferedWriter

package test;
import java.io.*;
public class Test {
    public static void main(String[] args) {
        File fs = new File("./aaa");
        try {
            FileWriter ws = new FileWriter(fs,true);
            BufferedWriter w = new BufferedWriter(ws);
            w.newLine(); // 写入换行 其他的方法一样
            w.write("aaa");
            w.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}