Lambda函数式接口获取字段名称

TypeFunction.java 函数式接口

@FunctionalInterface
public interface TypeFunction extends Serializable, Function {

    
    static String getLambdaColumnName(Serializable lambda) {
        try {
            Method method = lambda.getClass().getDeclaredMethod("writeReplace");
            method.setAccessible(Boolean.TRUE);
            SerializedLambda serializedLambda = (SerializedLambda) method.invoke(lambda);
            String getter = serializedLambda.getImplMethodName();
            String fieldName = Introspector.decapitalize(getter.replace("get", ""));
            return fieldName;
        } catch (ReflectiveOperationException e) {
            throw new RuntimeException(e);
        }
    }
}

LambdaUtils.java 获取字段名称工具类

public class LambdaUtils {

    public static  String getfieldName(TypeFunction typeFunction) {
        return TypeFunction.getLambdaColumnName(typeFunction);
    }

}

使用方式

public static void main(String[] args) {
     // es 对应的实体类
     ElasticOrder pddElasticOrder = new ElasticOrder();
     String fieldName = LambdaUtils.getfieldName(ElasticOrder ::getOrderSn);
     System.out.println("getfieldName = " + getfieldName);
 }

打印结果：orderSn