gzip,zlib,以及图形格式png，使用的是同一个压缩算法deflate。我们通过对gzip源码的分析来对deflate压缩算法做一个详细的说明。我阅读的gzip版本为 gzip-1.2.4。我们对算法做三种程度的说明。第一种程度，对gzip所使用压缩算法基本原理的说明。第二种程度，对gzip压缩算法实现方法的说明。第三种程度，对gzip实现源码级的说明。

-gzip, zlib, and graphics formats png, using the same compression algorithm deflate. Through the analysis of source code for gzip deflate compression algorithm to make a detailed descr iption. I read a gzip version of gzip-1.2.4. Our algorithm to do the three levels of descr iption. The first level, the gzip compression algorithm used in the descr iption of the basic principles. The second level, the gzip compression algorithm descr iption of the method. The third level of implementation of the gzip source-level descr iption.