Java I/O---字符与字节转换流---FileReader&FileWriter：

public class SubTransStreamDemo {
 
    /**
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        /**
         * 转换流的子类，专门用于操作文本文件的流对象
         */
        writeText();
        readText();
    }
 
    private static void readText() throws IOException {
        // TODO Auto-generated method stub
        FileReader fr = new FileReader("H:\\workspace\\Testfile\\1.txt");
 
        //等效于
//        FileInputStream fis = new FileInputStream("H:\\workspace\\Testfile\\1.txt");
//        InputStreamReader isr = new InputStreamReader(fis);        
 
        int ch = 0;
        while((ch = fr.read()) != -1){
            System.out.println((char)ch);
        }
        fr.close();
    }
 
    private static void writeText() throws IOException {
        // TODO Auto-generated method stub
        //创建一个用于操作文件的字符输出流对象
        FileWriter fw= new FileWriter("H:\\workspace\\Testfile\\1.txt");//默认码表GBK
        //上面一句等效于下面两行
//        FileOutputStream fos = new FileOutputStream("H:\\workspace\\Testfile\\1.txt");
//        OutputStreamWriter osw = new OutputStreamWriter(fos,"gbk");
        fw.write("你好");
 
        fw.close();
 
    }
 
}