activity6分页查询,listPage的参数

源码:

/**
 * Describes basic methods for querying.
 * 
 * @author Frederik Heremans
 */
public interface Query<T extends Query<?, ?>, U extends Object> {

  /**
   * Order the results ascending on the given property as defined in this class (needs to come after a call to one of the orderByXxxx methods).
   */
  T asc();

  /**
   * Order the results descending on the given property as defined in this class (needs to come after a call to one of the orderByXxxx methods).
   */
  T desc();

  /** Executes the query and returns the number of results */
  long count();

  /**
   * Executes the query and returns the resulting entity or null if no entity matches the query criteria.
   * 
   * @throws ActivitiException
   *           when the query results in more than one entities.
   */
  U singleResult();

  /** Executes the query and get a list of entities as the result. */
  List<U> list();

  /** Executes the query and get a list of entities as the result. */
  List<U> listPage(int firstResult, int maxResults);
}

firstResult指的是第一条,并不是第几页,
第几条就像mysql分页一样,重0开始,maxResults就像pageSize,重0开始往后第10条.
第二页则是(2-1)*10 ,10 就是重第十条开始,往后第十条.
所以应该写为:(pageNum - 1) * pageSize, pageSize