比较两个JavaBean对象的不同

比较两个bean的内容

/**
 * 比较两个Bean的内容
 *
 * @param <T>
 * @author SSISS
 */
public class ContrastObjUtils<T> {

    public String contrastObj(Object oldBean, Object newBean) {
        String str = "";
        T pojo1 = (T) oldBean;
        T pojo2 = (T) newBean;
        try {
            Class clazz = pojo1.getClass();
            Field[] fields = pojo1.getClass().getDeclaredFields();
            int i = 1;
            for (Field field : fields) {
                if ("serialVersionUID".equals(field.getName())) {
                    continue;
                }
                PropertyDescriptor pd = new PropertyDescriptor(field.getName(), clazz);
                Method getMethod = pd.getReadMethod();
                Object o1 = getMethod.invoke(pojo1);
                Object o2 = getMethod.invoke(pojo2);
                if (o1 == null || o2 == null) {
                    continue;
                }
                if (!o1.toString().equals(o2.toString())) {
                    if (i != 1) {
                        str += "；  ";
                    }
                    boolean hasAnnotation = field.isAnnotationPresent((Class<? extends Annotation>) CustomFieldName.class);

                    String customFieldValue = "";
                    if (hasAnnotation) {
                        CustomFieldName customFieldName = field.getAnnotation(CustomFieldName.class);
                        customFieldValue = customFieldName.value();
                    }
                    // 要显示的字段名
                    String fieldName = "";
                    if (customFieldValue != "") {
                        fieldName = customFieldValue;
                    } else {
                        fieldName = field.getName();
                    }

                    str += i + "、" + fieldName + "，旧值：" + o1 + "，新值：" + o2;
                    i++;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        return str;
    }