1、定义JavaScriptEngine

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

public class JavaScriptEngine {
    public static ScriptEngine engine;
    static {
        if (engine == null) {
            ScriptEngineManager mgr = new ScriptEngineManager();
            engine = mgr.getEngineByName("JavaScript");
        }
    }
}

2、使用

public static void main(String[] args) {

        try {

            SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd 'at' HH:mm:ss z");
            Date date = new Date(System.currentTimeMillis());
            System.out.println(formatter.format(date));
            for (int i = 0; i< 10000; i++) {
                boolean val = (boolean) JavaScriptEngine.engine.eval("function ss(){ var b=2; var x='21'; return 11&&x!='2';} ss();");
            }
            Date date1 = new Date(System.currentTimeMillis());
            System.out.println(formatter.format(date1));

        } catch (Exception ex) {
            System.out.println(ExceptionUtil.getERROR(ex));
        }
    }

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