包路径:javax.script.ScriptEngine 类名称:ScriptEngine 方法名:eval ScriptEngine.eval介绍 [英]Evaluates a script obtained using the specified reader as the script source. Returns null for scripts that don't return a value. [中]计算使用指定读取器作为脚本源获得的脚本。对于不返回值的脚本,返回null。 代...
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"”错误,以下是一些详细的解决步骤和考虑点: 检查engine对象是否已正确初始化: 确保在调用eval方法之前,engine对象已经被正确初始化。这通常通过ScriptEngineManager的getEngineByName方法实现。例如: java ScriptEngineManager manager =...
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...
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...
publicvoidexecuteScript(String script){ScriptEngineManager manager=newScriptEngineManager();ScriptEngine engine=manager.getEngineByName("JavaScript");try{// 在执行脚本之前先校验脚本是否包含语法错误Compilable compilable=(Compilable)engine;CompiledScript compiledScript=compilable.compile(script);compiledScript.eval();...
(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("...
package complier.test; import java.io.IOException; import java.text.DecimalFormat; import java.util.Arrays; import java.util.Random; import javax.script.Bindings; import javax.script.Compilable; import javax.script.CompiledScript; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; ...
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 ...