核心代码之分页

public class PageResult {

 //总记录数
 private long totalCount;
 //当前页号
 private int pageNo;
 //总页数
 private int totalPageCount;
 //页大小
 private int pageSize;
 //列表记录
 private List items;
 
 //计算总页数
 public PageResult(long totalCount, int pageNo, int pageSize, List items) {
  this.items = items==null?new ArrayList():items; //如果items是空的话 就new一个否者直接给他值，防止空指针异常
  this.totalCount = totalCount;
  this.pageSize = pageSize;
  if(totalCount != 0){ // 总记录数 非 0 时
   //计算总页数 
   int tem = (int)totalCount/pageSize;  //总页数 = 总记录数  除以  页大小
   this.totalPageCount = (totalCount%pageSize==0)?tem:(tem+1); //如果总记录数  % 页大小 == 0则 赋值页数 ， 否则+1,因为有多余的记录
   this.pageNo = pageNo;
  } else {
   this.pageNo = 0;
  }
 }
 
 public long getTotalCount() {
  return totalCount;
 }
 public void setTotalCount(long totalCount) {
  this.totalCount = totalCount;
 }
 public int getPageNo() {
  return pageNo;
 }
 public void setPageNo(int pageNo) {
  this.pageNo = pageNo;
 }
 public int getTotalPageCount() {
  return totalPageCount;
 }
 public void setTotalPageCount(int totalPageCount) {
  this.totalPageCount = totalPageCount;
 }
 public int getPageSize() {
  return pageSize;
 }
 public void setPageSize(int pageSize) {
  this.pageSize = pageSize;
 }
 public List getItems() {
  return items;
 }
 public void setItems(List items) {
  this.items = items;
 }
 
}