arthas/tutorials/katacoda/command-getstatic-cn/getstatic.md

• 推荐直接使用ognl命令，更加灵活。

通过getstatic命令可以方便的查看类的静态属性。使用方法为getstatic class_name field_name

getstatic demo.MathGame random{{execute T2}}

$ getstatic demo.MathGame random
field: random
@Random[
    serialVersionUID=@Long[3905348978240129619],
    seed=@AtomicLong[120955813885284],
    multiplier=@Long[25214903917],
    addend=@Long[11],
    mask=@Long[281474976710655],
    DOUBLE_UNIT=@Double[1.1102230246251565E-16],
    BadBound=@String[bound must be positive],
    BadRange=@String[bound must be greater than origin],
    BadSize=@String[size must be non-negative],
    seedUniquifier=@AtomicLong[-3282039941672302964],
    nextNextGaussian=@Double[0.0],
    haveNextNextGaussian=@Boolean[false],
    serialPersistentFields=@ObjectStreamField[][isEmpty=false;size=3],
    unsafe=@Unsafe[sun.misc.Unsafe@2eaa1027],
    seedOffset=@Long[24],
]

如果该静态属性是一个复杂对象，还可以支持在该属性上通过ognl表示进行遍历，过滤，访问对象的内部属性等操作。

• OGNL特殊用法请参考：https://github.com/alibaba/arthas/issues/71
• OGNL表达式官方指南：https://commons.apache.org/proper/commons-ognl/language-guide.html