在Java中访问未知Groovy类中的字段

import groovy.lang.GroovyObject;
import org.codehaus.groovy.runtime.InvokerHelper;

public class GroovyFieldAccessor {
    public static void main(String[] args) throws Exception {
        // 假设我们有一个Groovy类UnknownGroovyClass
        GroovyObject groovyObject = (GroovyObject) Class.forName("UnknownGroovyClass").newInstance();

        // 获取字段名
        String fieldName = "someField";

        // 使用Groovy的InvokerHelper获取字段值
        Object fieldValue = InvokerHelper.getProperty(groovyObject, fieldName);
        System.out.println("Field value: " + fieldValue);
    }
}

import groovy.lang.Binding;
import groovy.lang.GroovyShell;
import groovy.lang.Script;

public class GroovyScriptFieldAccessor {
    public static void main(String[] args) {
        // Groovy脚本字符串
        String scriptText = "class UnknownGroovyClass { String someField = 'Hello, World!' } UnknownGroovyClass instance = new UnknownGroovyClass()";

        // 创建GroovyShell
        Binding binding = new Binding();
        GroovyShell shell = new GroovyShell(binding);

        // 执行脚本
        Script script = shell.parse(scriptText);
        Object result = script.run();

        // 获取字段值
        Object fieldValue = InvokerHelper.getProperty(result, "someField");
        System.out.println("Field value: " + fieldValue);
    }
}