我爱java系列---java对象比较器，用于记录修改操作时修改的具体详情

Posted 2021-03-01 少年攻城狮

对象比较器

public class LogUtils<T> {

   /**
    * 对象比较器
    * 比较结果eg：1、字段名称loginName,旧值:liu,新值:gu;2、字段名称address,旧值:hunan,新值:neimenggu
    * @param oldBean
    * @param newBean
    * @return
    */
   public String compareObject(Object oldBean, Object newBean) {
      String str = "";

      //if (oldBean instanceof SysConfServer && newBean instanceof SysConfServer) {
      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 += ";";
               }
               str += i + "、字段名称" + field.getName() + ",旧值:" + o1 + ",新值:" + o2;
               i++;
            }
         }
      } catch (Exception e) {
         e.printStackTrace();
      }
      // }
      return str;
   }

}