Linux tomcat apr的下载和安装
在linux环境里面运行tomcat都要安装apr，否则会报：

 The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/local/java/jdk1.6.0_13/jre/lib/i386/client:/usr/local/java/jdk1.6.0_13/jre/lib/i386:/usr/local/java/jdk1.6.0_13/jre/../lib/i386:/usr/java/packages/lib/i386:/lib:/usr/lib

下载地址：
http://apache.spd.co.il/apr/

参考：
http://www.iteye.com/topic/349703
http://forcer521.iteye.com/blog/1188518
http://hi.baidu.com/javazyw/blog/item/aa5c5b20a62baa45925807f3.html
http://evgeny-goldin.com/blog/ubuntu-installing-apr-tomcat/