Jdk8中内置的JavaScript引擎nashorn被移除,导致验证码使用报错Cannot invoke "javax.script.ScriptEngine.eval(String)" because "engine" is null 项目中使用了com.github.whvcse包的easy-captcha验证码依赖,升级至Jdk17后,验证码接口报错:Cannot invoke "javax.script.ScriptEngine.eval(String)" because "engine" is ...
针对你遇到的“Cannot invoke 'javax.script.ScriptEngine.eval(String)' because 'engine' is null”错误,这个问题通常意味着在尝试调用eval方法时,ScriptEngine实例(即你的engine变量)尚未被正确初始化或已被设置为null。以下是几个解决步骤和考虑点,帮助你定位并修复这个问题: 确认engine对象在使用前已被正确初始化:...
项目中使用了 com.github.whvcse包的easy-captcha 验证码依赖,升级至Jdk17后,验证码接口报错:Cannot invoke "javax.script.ScriptEngine.eval(String)" because "engine" is null, 错误原因很明显脚本引擎执行脚本语句报错,因为执行引擎为空。 查询相关资料Jdk8自带的JavaScript引擎 nashorn 再升级到Jdk9后就被移除了...
1package ajava.codejavase;2import javaxscriptScriptEngineManager3import javaxscriptScriptEngine4import javaxscriptScriptException5import javautilDate67publicclassAjavaAccessJavaObjectFromScript{8publicstaticvoidmain(String[]args){9//创建用户数组,共5个用户10String[]users={"mark","道长","笨笨","13810","...
ScriptEngineappleScript=newScriptEngineManager().getEngineByName("AppleScript"); Stringresult=(String)appleScript.eval(script); System.out.println(result); } 代码示例来源:origin: shekhargulati/java8-the-missing-tutorial publicstaticvoidmain(String[]args)throwsScriptException{ ...
public class Main { public static void main(String[] args) { ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getEngineByName("js"); String script = "print ('www.java2s.com')"; try { engine.eval(script); } catch (ScriptException e) { e.printStackTra...
(newBeforeScriptEvent(script.getAbsolutePath()));scriptEngine.eval(reader);success = true; }catch(IOExceptionex) { throwable = ex; log.error("Error loading script: "+ script, ex); }catch(ScriptExceptionex) { throwable = ex;// Look up the cause hierarchy if we find a ModuleExecution...
isEmpty(express)){ try { ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getEngineByName("nashorn"); engine.put("value", value); engine.put("newValue", ""); engine.getBindings(ScriptContext.ENGINE_SCOPE); engine.eval(express); newValue = engine.get("...
eval() The following examples show how to use javax.script.ScriptEngine#eval() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API ...