java利用表达式开源项目中的jexl 对 templateId1fieldName product_codefieldOperatorcontainsfieldValueZAKB规则解析成表达式rootproduct_codecontainsZAKB 具体代码怎么实现？以及利用该表达式判断某个对象是否符合条件

使用JEXL解析规则生成表达式：

import org.apache.commons.jexl3.*;

public class RuleParser {
    
    public String parse(String rule) {
        String expression = "";
        try {
            JexlEngine jexl = new JexlBuilder().create();
            JexlExpression jexlExp = jexl.createExpression(rule);
            expression = jexlExp.toString();
        } catch (Exception e) {
            System.out.println("解析规则失败：" + e.getMessage());
        }
        return expression;
    }
}

判断对象是否符合条件：

import org.apache.commons.jexl3.*;

public class RuleEvaluator {
    
    public boolean evaluate(String expression, Object object) {
        try {
            JexlEngine jexl = new JexlBuilder().create();
            JexlExpression jexlExp = jexl.createExpression(expression);
            JexlContext jexlContext = new MapContext();
            jexlContext.set("root", object);
            Object result = jexlExp.evaluate(jexlContext);
            return (Boolean)result;
        } catch (Exception e) {
            System.out.println("判断对象是否符合条件失败：" + e.getMessage());
            return false;
        }
    }
}

示例代码：

public class Main {
    public static void main(String[] args) {
        // 解析规则生成表达式
        String rule = "root.product_code.contains(\"ZAKB\")";
        RuleParser parser = new RuleParser();
        String expression = parser.parse(rule);
        System.out.println(expression);
        
        // 判断对象是否符合条件
        Map<String, String> object = new HashMap<>();
        object.put("product_code", "ZAKB123");
        RuleEvaluator evaluator = new RuleEvaluator();
        boolean result = evaluator.evaluate(expression, object);
        System.out.println(result);
    }
}
``