查看和诊断JVM线程信息
使用方法:例:/usr/tomcat55/jdk1.6.0_27/bin/jstack 24189"Attach Listener" daemon prio=10 tid=0x0000000042835000 nid=0x7227 waiting on condition [0x0000000000000000]java.lang.Thread.State: RUNNABLE"http-8080-Processor799" daemon prio=10 tid=0x0000000042887000 nid=0x70fb in Object....