src/org/nutz/lang/Streams.java
public static long writeAndClose(Writer writer, Reader reader) {
        try {
            return write(writer, reader);
        }
        catch (IOException e) {
            throw Lang.wrapThrow(e);
        }
        finally {
            safeClose(writer);
            safeClose(reader);
        }
    }
public static long writeAndClose(Writer writer, Reader reader) {
        try {
            return write(writer, reader);
        }
        catch (IOException e) {
            throw Lang.wrapThrow(e);
        }
        finally {
            safeClose(writer);
            safeClose(reader);
        }
    }
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>，它会关闭输入/出流

@param writer
输出流
@param reader
输入流