Java读写操作指定编码格式（指定字符集）

读文件 ：BufferedReader；

BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(saveFilename),"GB2K"));

写文件：BufferedWriter；

PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(saveFilename),"GBK")));