jstack 12345 > 12345.tdump
"http-nio-8080-exec-3" #19 daemon prio=5 os_prio=0 tid=0x00007f6efcaa0800 nid=0x79d0 waiting on condition [0x00007f6ef5b67000]
? java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at com.example.demo.HelloController.topDemo(HelloController.java:31)
http-nio-8080-exec-3 ： thread name
prio=5 : priority
nid: thread id
0x00007f6ef5b67000: thread address
