src/org/nutz/lang/Streams.java
public static void write(Writer writer, CharSequence cs) throws IOException {
        if (null != cs && null != writer) {
            writer.write(cs.toString());
            writer.flush();
        }
    }
public static void write(Writer writer, CharSequence cs) throws IOException {
        if (null != cs && null != writer) {
            writer.write(cs.toString());
            writer.flush();
        }
    }
将一段文本全部写入一个writer。
<p>
<b style=color:red>注意</b>，它并不会关闭输出流

@param writer

@param cs
文本
@throws IOException