JAVA IO 学习日志

字符转换流的使用：

        InputStreamReader和OutputStreamWriter

import java.io.*;
public class Streamreadwrite {
    public static void main(String[] args) throws Exception{
        //字节流转化成字符流
        String filepath="e:/file.txt";
        InputStreamReader isr=new InputStreamReader(new FileInputStream(filepath), "UTF-8");
        BufferedReader bufferedReader=new BufferedReader(isr);
        String res=bufferedReader.readLine();
        System.out.println(res);
        //关闭外层
        bufferedReader.close();
        //要求向目标文件中 写入 Hello World！
        OutputStreamWriter osw=new OutputStreamWriter(new FileOutputStream(filepath,true),"gbk");
        BufferedWriter bw=new BufferedWriter(osw);
        String temp="nHello World!";
        bw.write(temp);
        bw.close();
    }
}