IO 转换流InputStreamReader & OutputStreamWriter

java

转换流(字节到字符流，别瞎玩)

public class 转换流 {
    public static void main(String[] args) throws Exception {
        File sourceFile = new File("E:/JavaTaskIO/123.txt");
        FileInputStream fis = new FileInputStream(sourceFile);
        InputStreamReader isr = new InputStreamReader(fis,"UTF-8");
        File targetFile = new File("E:/JavaTaskIO/转换流123.txt");
        FileOutputStream fos = new FileOutputStream(targetFile);
        OutputStreamWriter osw = new OutputStreamWriter(fos,"UTF-8");
        BufferedReader br = new BufferedReader(isr);
        BufferedWriter bw = new BufferedWriter(osw);
        long startTime = System.currentTimeMillis();
        String line = null;
        //br.readLine() 一行一行读
        while ((line = br.readLine()) != null) {
            bw.write(line);
            //bw.write("\r\n");//\r 回车 (windows)换行
            bw.flush();
            bw.newLine();//(跨平台)换行
        }
        long endTime = System.currentTimeMillis();  
        System.out.println("复制完成。。。共用时"+(endTime-startTime)+"毫秒");
        br.close();
        bw.close();
    }
}