JAVA IO 转换流

摘抄自 b站尚硅谷JAVA视频教程

 

InputStreamReader isr = null;
        OutputStreamWriter osw = null;
        try {
            FileInputStream fis = new FileInputStream("data.txt");
            FileOutputStream fis2 = new FileOutputStream("data_gbk.txt");
            isr = new InputStreamReader(fis,"utf-8");
            osw = new OutputStreamWriter(fis2,"gbk");

            char [] data = new char[20];
            int len =-1;
            while ((len=isr.read(data))!=-1){
                osw.write(data,0,len);
                System.out.print(new String(data,0,len));
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if(isr!=null)
                try {
                    isr.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            if(osw!=null)
                try {
                    osw.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
        }