code: public static String updateTable(Class<?> entityClass, String defaultTableName, String entityName) {
          StringBuilder sql = new StringBuilder();
          sql.append("UPDATE ");
          sql.append(getDynamicTableName(entityClass, defaultTableName, entityName));
          sql.append(" ");
          return sql.toString();
      }
docs: update tableName - 动态表名
  
  @param entityClass
  @param defaultTableName 默认表名
  @param entityName       别名
  @return