今天下载Windows安装版的tomcat5.5，安装完以后启动时候出现：

The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: ......

意思是说在产品环境下可以优化工作性能的Tomcat的本地包没有找到。

Google了一下，原来Tomcat从5.5版本后增加了APR技术（Apache Portable Runtime），这是一个用C语言写成文件包，目的在于提高Tomcat的服务性能，从而使得Tomcat将不仅仅担任一个容器的功能，而是要成为一个一般的web服务器（general purpose webserver）。 所以按照上面的提示，下载了tcnative-1.dll文件，放入上面提示所列出的java.library.path中的任意一个里面，结果又出现下面的错误：

严重: An incompatible version 1.1.1 of the Apache Tomcat Native library is installed, while Tomcat requires version 1.1.3

意思是说刚才下的版本过低，需要下载一个更高高版本的。

具体下载地址：tomcat.heanet.ie/native/

里面列出了1.1.0-1.1.9所有版本的链接地址！随便下载一个高于1.1.3版本的替换掉刚才文件就可以，既然有高版本的，当然下最新的喽~~

我下载的是1.1.9 替换掉以后再次启动tomcat会出现：

org.apache.coyote.http11.Http11AprProtocol init 

这样就说明我们刚才成功了~~ 庆祝一下！

顺便附上各个版本tcnative-1.dll文件的下载地址，省的麻烦~~---->

1.1.9/           1-Apr-2007 20:45    - tomcat.heanet.ie/native/1.1.9/binaries/win32/tcnative-1.dll 1.1.8/           14-Dec-2006 09:19    - tomcat.heanet.ie/native/1.1.8/binaries/win32/tcnative-1.dll 1.1.7/           13-Nov-2006 12:18    -tomcat.heanet.ie/native/1.1.7/binaries/win32/tcnative-1.dll 1.1.6/           17-Oct-2006 08:22    - tomcat.heanet.ie/native/1.1.6/binaries/win32/tcnative-1.dll 1.1.4/           07-Sep-2006 09:11    -tomcat.heanet.ie/native/1.1.4/binaries/win32/tcnative-1.dll 1.1.3/           14-Apr-2006 09:36    - tomcat.heanet.ie/native/1.1.3/binaries/win32/tcnative-1.dll 1.1.2/           09-Feb-2006 09:57    - tomcat.heanet.ie/native/1.1.2/binaries/win32/tcnative-1.dll 1.1.14/          11-Jul-2008 16:35    - tomcat.heanet.ie/native/1.1.14/binaries/win32/tcnative-1.dll 1.1.12/          14-Jan-2008 08:01    - tomcat.heanet.ie/native/1.1.12/binaries/win32/tcnative-1.dll 1.1.10/          02-Apr-2007 07:18    - tomcat.heanet.ie/native/1.1.10/binaries/win32/tcnative-1.dll 1.1.1/           01-Dec-2005 12:54    - tomcat.heanet.ie/native/1.1.1/binaries/win32/tcnative-1.dll

#Java

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