ex">&para;</a></h4>
    <pre class="funcdecl">func NewWriterLevel(w <a href="io.htm">io</a>.<a href="io.htm#Writer">Writer</a>, level <a href="builtin.htm#int">int</a>) (*<a href="#Writer">Writer</a>, <a href="builtin.htm#error">error</a>)</pre>
    <p align="left">NewWriterLevel类似NewWriter但指定了压缩水平而不是采用默认的DefaultCompression。</p>
    <p align="left">参数level可以是DefaultCompression、NoCompression或BestSpeed与BestCompression之间包括二者的任何整数。如