在使用tomcat6.0时老提示“The APR based Apache Tomcat Native library which allows optimal performanc e in production environments was not found ”，需要向其安装目录下的bin目录下添加tcnative-1 1.1.17而事实上需要的版本是1.1.19.
tcnative-1 本地库，在出现The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: 错误的时候要用上， 把该文件放在bin目录下即可
