java使用rhino-engine执行动态js代码

引用依赖rhino-engine

<dependency>
    <groupId>org.mozilla</groupId>
    <artifactId>rhino-engine</artifactId>
    <version>1.8.0</version>
</dependency>

核心代码

private static Object runJsCode(String jsCode,  String functionName, Object... args) throws ScriptException, NoSuchMethodException {
    ScriptEngineManager sem = new ScriptEngineManager();
    ScriptEngine engine = sem.getEngineByName("rhino");
    engine.eval(jsCode);

    Invocable jsInvoke = (Invocable) engine;
    return jsInvoke.invokeFunction(functionName, args);
}

完整功能示例

import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

/**
 * @author Mingkai
 * @date 2025/5/19 10:55
 * @description java运行js代码
 */
public class RunJs {
    public static void main(String[] args) throws ScriptException, NoSuchMethodException {

        String jsCode = """
                function add(a, b) {
                    return parseInt(a) + parseInt(b);
                }
                """;
        System.out.println(runJsCode(jsCode, "add", 5, 3));
    }

    /**
     * 泛型方法：运行 JS 函数并返回指定类型的返回值
     *
     * @param jsCode JS 脚本代码
     * @return JS 执行结果
     * @throws ScriptException       脚本执行异常
     * @throws NoSuchMethodException JS 方法不存在
     */
    private static Object runJsCode(String jsCode,  String functionName, Object... args) throws ScriptException, NoSuchMethodException {
        ScriptEngineManager sem = new ScriptEngineManager();
        ScriptEngine engine = sem.getEngineByName("rhino");
        engine.eval(jsCode);

        Invocable jsInvoke = (Invocable) engine;
        return jsInvoke.invokeFunction(functionName, args);
    }
}