实战获取java-pid# jps -l7ktg-admin.jar201sun.tools.jps.Jpsjstack 线程栈：死锁、CPU 飙高、线程阻塞# 输出到文件（必用）jstackjava‑pidthread.log# 进程卡死无响应，强制dumpjstack-Fjava‑pidg