package test.dao; 
 
import java.util.List; 
 
/** 
 * 用于分頁(yè)的工具類 
 * @author 莫取網(wǎng)名 
 */ 
public class Pager<T> { 
 
 private List<T> list; //對(duì)象記錄結(jié)果集 
 private int total = 0; // 總記錄數(shù) 
 private int limit = 20; // 每頁(yè)顯示記錄數(shù) 
 private int pages = 1; // 總頁(yè)數(shù) 
 private int pageNumber = 1; // 當(dāng)前頁(yè) 
  
 private boolean isFirstPage=false;  //是否為第一頁(yè) 
 private boolean isLastPage=false;   //是否為最后一頁(yè) 
 private boolean hasPreviousPage=false; //是否有前一頁(yè) 
 private boolean hasNextPage=false;  //是否有下一頁(yè) 
  
 private int navigatePages=8; //導(dǎo)航頁(yè)碼數(shù) 
 private int[] navigatePageNumbers; //所有導(dǎo)航頁(yè)號(hào) 
  
 public Pager(int total, int pageNumber) { 
  init(total, pageNumber, limit); 
 } 
  
 public Pager(int total, int pageNumber, int limit) { 
  init(total, pageNumber, limit); 
 } 
  
 private void init(int total, int pageNumber, int limit){ 
  //設(shè)置基本參數(shù) 
  this.total=total; 
  this.limit=limit; 
  this.pages=(this.total-1)/this.limit+1; 
   
  //根據(jù)輸入可能錯(cuò)誤的當(dāng)前號(hào)碼進(jìn)行自動(dòng)糾正 
  if(pageNumber<1){ 
   this.pageNumber=1; 
  }else if(pageNumber>this.pages){ 
   this.pageNumber=this.pages; 
  }else{ 
   this.pageNumber=pageNumber; 
  } 
   
  //基本參數(shù)設(shè)定之后進(jìn)行導(dǎo)航頁(yè)面的計(jì)算 
  calcNavigatePageNumbers(); 
   
  //以及頁(yè)面邊界的判定 
  judgePageBoudary(); 
 } 
  
 /** 
  * 計(jì)算導(dǎo)航頁(yè) 
  */ 
 private void calcNavigatePageNumbers(){ 
  //當(dāng)總頁(yè)數(shù)小于或等于導(dǎo)航頁(yè)碼數(shù)時(shí) 
  if(pages<=navigatePages){ 
   navigatePageNumbers=new int[pages]; 
   for(int i=0;i<pages;i++){ 
    navigatePageNumbers[i]=i+1; 
   } 
  }else{ //當(dāng)總頁(yè)數(shù)大于導(dǎo)航頁(yè)碼數(shù)時(shí) 
   navigatePageNumbers=new int[navigatePages]; 
   int startNum=pageNumber-navigatePages/2; 
   int endNum=pageNumber+navigatePages/2; 
    
   if(startNum<1){ 
    startNum=1; 
    //(最前navigatePages頁(yè) 
    for(int i=0;i<navigatePages;i++){ 
     navigatePageNumbers[i]=startNum++; 
    } 
   }else if(endNum>pages){ 
    endNum=pages; 
    //最后navigatePages頁(yè) 
    for(int i=navigatePages-1;i>=0;i--){ 
     navigatePageNumbers[i]=endNum--; 
    } 
   }else{ 
    //所有中間頁(yè) 
    for(int i=0;i<navigatePages;i++){ 
     navigatePageNumbers[i]=startNum++; 
    } 
   } 
  } 
 } 
 
 /** 
  * 判定頁(yè)面邊界 
  */ 
 private void judgePageBoudary(){ 
  isFirstPage = pageNumber == 1; 
  isLastPage = pageNumber == pages && pageNumber!=1; 
  hasPreviousPage = pageNumber > 1; 
  hasNextPage = pageNumber < pages; 
 } 
  
  
 public void setList(List<T> list) { 
  this.list = list; 
 } 
 
 /** 
  * 得到當(dāng)前頁(yè)的內(nèi)容 
  * @return {List} 
  */ 
 public List<T> getList() { 
  return list; 
 } 
 
 /** 
  * 得到記錄總數(shù) 
  * @return {int} 
  */ 
 public int getTotal() { 
  return total; 
 } 
 
 /** 
  * 得到每頁(yè)顯示多少條記錄 
  * @return {int} 
  */ 
 public int getLimit() { 
  return limit; 
 } 
 
 /** 
  * 得到頁(yè)面總數(shù) 
  * @return {int} 
  */ 
 public int getPages() { 
  return pages; 
 } 
 
 /** 
  * 得到當(dāng)前頁(yè)號(hào) 
  * @return {int} 
  */ 
 public int getPageNumber() { 
  return pageNumber; 
 } 
 
 
 /** 
  * 得到所有導(dǎo)航頁(yè)號(hào) 
  * @return {int[]} 
  */ 
 public int[] getNavigatePageNumbers() { 
  return navigatePageNumbers; 
 } 
 
 public boolean isFirstPage() { 
  return isFirstPage; 
 } 
 
 public boolean isLastPage() { 
  return isLastPage; 
 } 
 
 public boolean hasPreviousPage() { 
  return hasPreviousPage; 
 } 
 
 public boolean hasNextPage() { 
  return hasNextPage; 
 } 
 
 public String toString(){ 
  StringBuffer sb=new StringBuffer(); 
  sb.append("[") 
   .append("total=").append(total) 
   .append(",pages=").append(pages) 
   .append(",pageNumber=").append(pageNumber) 
   .append(",limit=").append(limit) 
   .append(",isFirstPage=").append(isFirstPage) 
   .append(",isLastPage=").append(isLastPage) 
   .append(",hasPreviousPage=").append(hasPreviousPage) 
   .append(",hasNextPage=").append(hasNextPage) 
  .append(",navigatePageNumbers="); 
  int len=navigatePageNumbers.length; 
  if(len>0)sb.append(navigatePageNumbers[0]); 
  for(int i=1;i<len;i++){ 
   sb.append(" "+navigatePageNumbers[i]); 
  } 
  sb.append(",list.size="+list.size()); 
  sb.append("]"); 
  return sb.toString(); 
 } 
} 

int totalCount=Integer.valueOf(queryCount.uniqueResult().toString()); 
Pager pager=new Pager(totalCount, pageNumber,limit); 
queryList.setFirstResult((pager.getPageNumber()-1)*limit); //容錯(cuò)處理 
queryList.setMaxResults(limit); 
pager.setList(queryList.list()); 
return pager;