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< span id = "ognl" > < / span > < h1 > ognl< a class = "headerlink" href = "#ognl" title = "永久链接至标题" > ¶< / a > < / h1 >
< blockquote >
< div > 执行ognl表达式< / div > < / blockquote >
< p > 从3.0.5版本增加< / p >
< div class = "section" id = "" >
< span id = "id1" > < / span > < h2 > 参数说明< a class = "headerlink" href = "#" title = "永久链接至标题" > ¶< / a > < / h2 >
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< th align = "right" > 参数名称< / th >
< th align = "left" > 参数说明< / th >
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< tr >
< td align = "right" > < em > express< / em > < / td >
< td align = "left" > 执行的表达式< / td >
< / tr >
< tr >
< td align = "right" > < code > [c:]< / code > < / td >
< td align = "left" > 执行表达式的 ClassLoader 的 hashcode， < / td >
< / tr >
< tr >
< td align = "right" > [x]< / td >
< td align = "left" > 结果对象的展开层次， < / td >
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< span id = "id2" > < / span > < h2 > 使用参考< a class = "headerlink" href = "#" title = "永久链接至标题" > ¶< / a > < / h2 >
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< li > OGNL特殊用法请参考： < a class = "reference external" href = "https://github.com/alibaba/arthas/issues/71" > https://github.com/alibaba/arthas/issues/71< / a > < / li >
< li > OGNL表达式官方指南： < a class = "reference external" href = "https://commons.apache.org/proper/commons-ognl/language-guide.html" > https://commons.apache.org/proper/commons-ognl/language-guide.html< / a > < / li >
< / ul >
< p > 调用静态函数：< / p >
< div class = "highlight-bash notranslate" > < div class = "highlight" > < pre > < span > < / span > $ ognl < span class = "s1" > ' @java.lang.System@out.println(" hello" )' < / span >
null
< / pre > < / div >
< / div >
< p > 获取静态类的静态字段：< / p >
< div class = "highlight-bash notranslate" > < div class = "highlight" > < pre > < span > < / span > $ ognl < span class = "s1" > ' @demo.MathGame@random' < / span >
@Random< span class = "o" > [< / span >
< span class = "nv" > serialVersionUID< / span > < span class = "o" > =< / span > @Long< span class = "o" > [< / span > < span class = "m" > 3905348978240129619< / span > < span class = "o" > ]< / span > ,
< span class = "nv" > seed< / span > < span class = "o" > =< / span > @AtomicLong< span class = "o" > [< / span > < span class = "m" > 125451474443703< / span > < span class = "o" > ]< / span > ,
< span class = "nv" > multiplier< / span > < span class = "o" > =< / span > @Long< span class = "o" > [< / span > < span class = "m" > 25214903917< / span > < span class = "o" > ]< / span > ,
< span class = "nv" > addend< / span > < span class = "o" > =< / span > @Long< span class = "o" > [< / span > < span class = "m" > 11< / span > < span class = "o" > ]< / span > ,
< span class = "nv" > mask< / span > < span class = "o" > =< / span > @Long< span class = "o" > [< / span > < span class = "m" > 281474976710655< / span > < span class = "o" > ]< / span > ,
< span class = "nv" > DOUBLE_UNIT< / span > < span class = "o" > =< / span > @Double< span class = "o" > [< / span > < span class = "m" > 1< / span > .1102230246251565E-16< span class = "o" > ]< / span > ,
< span class = "nv" > BadBound< / span > < span class = "o" > =< / span > @String< span class = "o" > [< / span > bound must be positive< span class = "o" > ]< / span > ,
< span class = "nv" > BadRange< / span > < span class = "o" > =< / span > @String< span class = "o" > [< / span > bound must be greater than origin< span class = "o" > ]< / span > ,
< span class = "nv" > BadSize< / span > < span class = "o" > =< / span > @String< span class = "o" > [< / span > size must be non-negative< span class = "o" > ]< / span > ,
< span class = "nv" > seedUniquifier< / span > < span class = "o" > =< / span > @AtomicLong< span class = "o" > [< / span > -3282039941672302964< span class = "o" > ]< / span > ,
< span class = "nv" > nextNextGaussian< / span > < span class = "o" > =< / span > @Double< span class = "o" > [< / span > < span class = "m" > 0< / span > .0< span class = "o" > ]< / span > ,
< span class = "nv" > haveNextNextGaussian< / span > < span class = "o" > =< / span > @Boolean< span class = "o" > [< / span > false< span class = "o" > ]< / span > ,
< span class = "nv" > serialPersistentFields< / span > < span class = "o" > =< / span > @ObjectStreamField< span class = "o" > [][< / span > < span class = "nv" > isEmpty< / span > < span class = "o" > =< / span > false< span class = "p" > ;< / span > < span class = "nv" > size< / span > < span class = "o" > =< / span > < span class = "m" > 3< / span > < span class = "o" > ]< / span > ,
< span class = "nv" > unsafe< / span > < span class = "o" > =< / span > @Unsafe< span class = "o" > [< / span > sun.misc.Unsafe@28ea5898< span class = "o" > ]< / span > ,
< span class = "nv" > seedOffset< / span > < span class = "o" > =< / span > @Long< span class = "o" > [< / span > < span class = "m" > 24< / span > < span class = "o" > ]< / span > ,
< span class = "o" > ]< / span >
< / pre > < / div >
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< p > 执行多行表达式， ， ： < / p >
< div class = "highlight-bash notranslate" > < div class = "highlight" > < pre > < span > < / span > $ ognl < span class = "s1" > ' #value1=@System@getProperty(" java.home" ), #value2=@System@getProperty(" java.runtime.name" ), {#value1, #value2}' < / span >
@ArrayList< span class = "o" > [< / span >
@String< span class = "o" > [< / span > /opt/java/8.0.181-zulu/jre< span class = "o" > ]< / span > ,
@String< span class = "o" > [< / span > OpenJDK Runtime Environment< span class = "o" > ]< / span > ,
< span class = "o" > ]< / span >
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