JDK小工具

1. jsp

顯示當前所有java進程pid

$ jps
27689 jar
14781 jar
27678 Jps
$ jps -l   # 輸出應用程序main class的完整package名或者應用程序的jar文件完整路徑名
27655 sun.tools.jps.Jps
27689 baqisCloud-0.0.1-SNAPSHOT.jar
14781 baqisCloud-0.0.1-SNAPSHOT.jar
$ jps -v  # 輸出傳遞給JVM的參數
27689 jar -Djasypt.encryptor.password=bAq1sC1oud -Djava.library.path=/home/spinq/baqisCloud/simulator/build/uat -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -Xloggc:/home/spinq/baqisCloud/backend/logs/sit/java-gc/gc.log
27626 Jps -Dapplication.home=/usr/lib/jvm/java-8-openjdk-amd64 -Xms8m
14781 jar -Djasypt.encryptor.password=bAq1sC1oud -Djava.library.path=/home/spinq/baqisCloud/simulator/build/uat -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -Xloggc:/home/spinq/baqisCloud/backend/logs/uat/java-gc/gc.log

2. jmap

jmap 命令使用