UTF-8转GDK

Posted 2020-09-05

思路：建立一个my.txt文本，输入“中华人民共和国万岁”，从文件系统中获得输入字节，将字节流转换为字符流，默认码为UTF-8

　　　读取文本行，建立一个my2.txt文本，默认码为GDK，把之前读到的文本行写在my2.txt。

代码：

package zuoye;

//2017.0321 by小方
import java.io.*;

public class F0321 {
    public static void main(String args[]) throws Exception{
        String a= "d:\\\\my.txt";
        FileInputStream f = new FileInputStream(a);
        InputStreamReader i = new InputStreamReader(f,"UTF-8");
        BufferedReader br = new BufferedReader(i);
        String s = br.readLine();
        if(s==null){
            System.out.println(a);
            return;
        }else{
            System.out.println(s);
        }
        FileOutputStream fo = new FileOutputStream("d:\\\\my2.txt");
        OutputStreamWriter b = new OutputStreamWriter(fo,"GBK");
        b.write(s.substring(0));
        b.flush();
    }

}

检验:

刚开始建立的my.txt为27个字节，notepad++默认打开是utf-8，后来形成的my2.txt为18个字节,notepad++默认打开是GDK。如图所示：