流对象InputStreamReader OutputStreamWriter

[java]代码库

public InputStreamReader (InputStream in);
/*in是字节流，而InputStreamReader是字符流，但是其来源是字节流in，
因此InputStreamReader就可以把字节流in转换成字符流处理。/*

public InputStreamReader(InputStream in,String enc) throws UnsupportedEncodingException;
/*enc是编码方式，就是从字节流到字符流进行转换时所采用的编码方式，
例如 ISO8859-1，UTF-8，UTF-16等等*/

public OutputStreamWriter (OutputStream out);
/*out是字节流，而OutputStreamReader是字符流 */

public OutputStreamWriter (OutputStream out, String enc) throws UnsupportedEncodingException; //enc是编码方式