動態修改對象註解屬性的值

運用了lombox插件

import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
import lombok.experimental.Accessors;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
import java.util.Map;

/**
 *  
 *  * @projectName
 *  * @title     AnnotationUtil   
 *  * @package  
 *  * @description    註解工具類
 *  * @author IT_CREAT     
 *  * @date  2019 2019/9/14 21:16  
 *  * @version V1.0.0 
 *  
 */
@Data
@Accessors(chain = true)
@ToString
@NoArgsConstructor
public class AnnotationUtil<T> {

    public Class<T> clazz;

    public AnnotationUtil(Class<T> clazz){
        this.clazz = clazz;
    }

    /**
     * 動態修改對象屬性上某個註解的屬性值，通過getClazz()方法可以得到修改後的class
     * @param fieldName 對象屬性名稱
     * @param annotationClass 註解class
     * @param attrName 註解屬性名稱
     * @param attrValue 註解屬性值
     * @return 本工具類實例
     * @throws Exception 異常
     */
    public AnnotationUtil updateAnnoAttrValue(String fieldName, Class<? extends Annotation> annotationClass,String attrName, Object attrValue) throws Exception {
        Field[] declaredFields = this.clazz.getDeclaredFields();
        if(null != declaredFields && declaredFields.length != 0){
            for (int i=0;i<declaredFields.length;i++){
                Field declaredField = declaredFields[i];
                if(fieldName.equals(declaredField.getName())){
                    InvocationHandler invocationHandler = Proxy.getInvocationHandler(declaredField.getAnnotation(annotationClass));
                    Field hField = invocationHandler.getClass().getDeclaredField("memberValues");
                    hField.setAccessible(true);
                    Map memberValues  = (Map)hField.get(invocationHandler);
                    memberValues.put(attrName,attrValue);
                    break;
                }
            }
        }
        return this;
    }

    public static void main(String[] args) {

    }
}