public static long write(Writer writer, Reader reader) throws IOException {
        if (null == writer || null == reader)
            return 0;

        char[] cbuf = new char[BUF_SIZE];
        int len, count = 0;
        while (true) {
            len = reader.read(cbuf);
            if (len == -1)
                break;
            writer.write(cbuf, 0, len);
            count += len;
        }
        return count;
    }
public static long write(Writer writer, Reader reader) throws IOException {
        if (null == writer || null == reader)
            return 0;

        char[] cbuf = new char[BUF_SIZE];
        int len, count = 0;
        while (true) {
            len = reader.read(cbuf);
            if (len == -1)
                break;
            writer.write(cbuf, 0, len);
            count += len;
        }
        return count;
    }
public static long write ( Writer writer , Reader reader ) throws IOException { if ( null == writer || null == reader ) return 0 ; char [ ] cbuf = new char [ BUF_SIZE ] ; int len , count = 0 ; while ( true ) { len = reader . read ( cbuf ) ; if ( len == - 1 ) break ; writer . write ( cbuf , 0 , len ) ; count += len ; } return count ; }
将文本输入流写入一个文本输出流。块大小为 8192
<p>
<b style=color:red>注意</b>，它并不会关闭输入/出流

@param writer
输出流
@param reader
输入流
@throws IOException
将文本输入流写入一个文本输出流。块大小为 8192 <p > <b style = color : red > 注意< / b > ，它并不会关闭输入 / 出流