通过注解的方式实现对象指定属性前后对比记录

指定属性对比注解

@Target({ElementType.METHOD, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface OperationLog {
    String name() default "";
}

对比工具类

@Slf4j
public class OperationLogUtil {

    public static String operationLog(Object newObject, Object oldObject) {
        Class<?> clazz = newObject.getClass();
        log.info("操作日志--->需要记录的类：" + clazz.getName());

        List<Field> fields = new ArrayList<>();
        Class<?> tempClass = clazz;
        while (tempClass != null && !Objects.equals("Object", tempClass.getName())){
            fields.addAll(Arrays.asList(tempClass.getDeclaredFields()));
            tempClass = tempClass.getSuperclass();
        }

        log.info("操作日志--->需要记录的属性：" + fields.toString());

        StringBuilder str = new StringBuilder();
        Set<String> uniqueField = new HashSet<>();

        fields.forEach(field -> {
            if(field.isAnnotationPresent(OperationLog.class)){

                if(!uniqueField.add(field.getName())){
                    return;
                }

                OperationLog operationLogChinese = field.getAnnotation(OperationLog.class);
                String name = operationLogChinese.name();

                try {
                    PropertyDescriptor pd = new PropertyDescriptor(field.getName(), clazz);
                    Method getMethod = pd.getReadMethod();

                    Object newValue = getMethod.invoke(newObject);
                    Object oldValue = getMethod.invoke(oldObject);

                    if (null == oldValue || StringUtils.isBlank(oldValue.toString())){
                        oldValue = "无";
                    }

                    if (null == newValue || StringUtils.isBlank(newValue.toString())){
                        newValue = "无";
                    }

                    if(!Objects.equals(newValue.toString(), oldValue.toString())){
                        str.append(name).append(":由[").append(oldValue).append("]改成[").append(newValue).append("];");
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });

        log.info("日志结果：" + str.toString());

        return str.toString();
    }