Java IO包中InputStreamReader和OutputStreamWriter的简介说明

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Java IO包中InputStreamReader和OutputStreamWriter的简介说明

下文笔者讲述java.io包中InputStreamReader和OutputStreamWriter的简介说明,如下所示:

InputStreamReader和OutputStreamWriter的功能:
    将一个字节流转换为字符流

InputStreamReader

InputStreamReader的功能:
将输入的字节流转换为字符流,如下所示:

InputStream inputStream = new FileInputStream("e:\\test\\test.txt");
Reader reader = new InputStreamReader(inputStream);
int data = reader.read();
while(data != -1){
    char theChar = (char) data;
    data = reader.read();
}
reader.close();

此处的read()方法，将返回一个int型的值(0~65535)
当read()返回-1时,则代表没有剩余可读字符，此时可关闭Reader

OutputStreamWriter

OutputStreamWriter将该输出字节流转换成字符流,如下例所示：

OutputStream outputStream = new FileOutputStream("e:\\test\\output.txt");
   Writer writer = new OutputStreamWriter(outputStream);
          writer.write("java265.com is my webSite.");
          writer.close();