InputStreamReader与OutputStreamWriter

　　InputStreamReader与OutputStreamWriter都能够通过其构造方法将字节流转为字符流，不同点在于流向不同：
　　
InputStreamReader继承自Reader其构造方法为：

public static void test()throws Exception{    File file = new File("e:/data.txt");    FileInputStream inputStream = new FileInputStream(file);    InputStreamReader inputStreamReader = new InputStreamReader(inputStream,"utf-8");    for(int i = 0;i < file.length();i++){        System.out.print((char)inputStreamReader.read());    }}

OutputStreamWriter继承自Writer其构造方法为：

public static void test()throws Exception{    File file = new File("e:/data.txt");    OutputStream outputStream = new FileOutputStream(file);    OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream,"utf-8");    System.out.println(outputStreamWriter.getEncoding());    outputStreamWriter.write("abcdefg",0,5);    outputStreamWriter.flush();    outputStreamWriter.close();}