package test.dao;  import java.util.List;  /**  * 用于分頁的工具類  * @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; // 每頁顯示記錄數(shù)  private int pages = 1; // 總頁數(shù)  private int pageNumber = 1; // 當(dāng)前頁    private boolean isFirstPage=false;  //是否為第一頁  private boolean isLastPage=false;   //是否為最后一頁  private boolean hasPreviousPage=false; //是否有前一頁  private boolean hasNextPage=false;  //是否有下一頁    private int navigatePages=8; //導(dǎo)航頁碼數(shù)  private int[] navigatePageNumbers; //所有導(dǎo)航頁號(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)航頁面的計(jì)算   calcNavigatePageNumbers();      //以及頁面邊界的判定   judgePageBoudary();  }    /**   * 計(jì)算導(dǎo)航頁   */  private void calcNavigatePageNumbers(){   //當(dāng)總頁數(shù)小于或等于導(dǎo)航頁碼數(shù)時(shí)   if(pages<=navigatePages){    navigatePageNumbers=new int[pages];    for(int i=0;i<pages;i++){     navigatePageNumbers[i]=i+1;    }   }else{ //當(dāng)總頁數(shù)大于導(dǎo)航頁碼數(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     for(int i=0;i<navigatePages;i++){      navigatePageNumbers[i]=startNum++;     }    }else if(endNum>pages){     endNum=pages;     //最后navigatePages頁     for(int i=navigatePages-1;i>=0;i--){      navigatePageNumbers[i]=endNum--;     }    }else{     //所有中間頁     for(int i=0;i<navigatePages;i++){      navigatePageNumbers[i]=startNum++;     }    }   }  }   /**   * 判定頁面邊界   */  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;  }   /**   * 得到每頁顯示多少條記錄   * @return {int}   */  public int getLimit() {   return limit;  }   /**   * 得到頁面總數(shù)   * @return {int}   */  public int getPages() {   return pages;  }   /**   * 得到當(dāng)前頁號(hào)   * @return {int}   */  public int getPageNumber() {   return pageNumber;  }    /**   * 得到所有導(dǎo)航頁號(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;