java BufferedReaderºÍInputStreamReaderµÄÇø±ð
BufferedReader:
Read text from a character-input
stream, buffering characters so as to provide for the
efficient reading of characters, arrays, and lines.
InputStreamReader:
An InputStreamReader is a bridge from byte streams to
character streams: It reads bytes and decodes them
into characters using a specified charset.
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import java.io.FileWriter;
import java.io.IOException;
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