splitpage.java

公司自己开发的工作流引擎

package cn.com.iaspec.workflow.data;

/**
 * <p>Title:待办任务分页控制类 </p>
 *
 * <p>Description: 深圳市劳动仲裁信息管理系统</p>
 *
 * <p>Copyright: Copyright (c) 2005</p>
 *
 * <p>Company: 永泰软件工程有限公司</p>
 *
 * @author syj
 * @version 1.0
 */
import java.util.*;

public class SplitPage{

  private PageInfo pageInfo=null;
  private ArrayList pagelist=null;

  /**
   * 取得数据集合的长度
   * @return int
   */
  public long getPagelistSize(){
    pagelist.trimToSize();
    return pagelist.size();
  }

  /**
   *
   * @return PageInfo
   */
  public PageInfo getPageInfo(){
    if(pageInfo==null){
      pageInfo=new PageInfo();
    }
    return pageInfo;
  }

  /**
   *
   * @param pageInfo PageInfo
   */
  public void setPageInfo(PageInfo pageInfo,ArrayList pagelist){
    this.pageInfo=pageInfo;
    this.pagelist=pagelist;
  }

  public SplitPage(){}

  /**
   *
   * @param pageInfo PageInfo
   */
  public SplitPage(PageInfo pageInfo){
    this.pageInfo=pageInfo;
  }

  /**
   *
   * @return ArrayList
   */
  public ArrayList getPagelist(){
    return pagelist;
  }

  /**
   *
   * @param pagelist ArrayList
   */
  public void setPagelist(ArrayList pagelist){
    this.pagelist=pagelist;
  }

  /**
   * 取得符合条件的总记录数
   * @return long
   */
  public long getLongRowTotal(){
    return getPagelistSize();
  }

  /**
   * 取得符合条件的总页数
   * @return long
   */
  public long getLongPageTotal(){
    return((getPagelistSize()+pageInfo.getLongRowsPerPage())-
        1)/pageInfo.getLongRowsPerPage();
  }

  /**
   * 取得结束记录数
   * @return long
   */
  public long getLongRowEnd(){
    long RowEnd=getLongRowBegin()+pageInfo.getLongRowsPerPage()-1;
    if(RowEnd>getLongRowTotal()){
      return getLongRowTotal();
    }
    return RowEnd;
  }

  /**
   * 取得开始记录数
   * @return long
   */
  public long getLongRowBegin(){
    long RowBegin=(pageInfo.getLongCurPage()-1)*pageInfo.getLongRowsPerPage()+1;
    if(RowBegin>getLongRowTotal()){
      return getLongRowTotal();
    }
    return RowBegin;
  }

  /**
   * 返回翻页方式的参数值
   * @return long
   */
  public int getCheckpageinfo(){
    return pageInfo.getCheckpageinfo();
  }

  /**
   * 取得当前页数
   * @return long
   */
  public long getLongCurPage(){
    return pageInfo.getLongCurPage();
  }

  /**
   * 判断欲转到页是否等于当前页，如果不等就把欲转到页赋值给当前页(还要判断当前页面是上一页还是下意义页)
   */
  public void setlongCurPage(){
    if(pageInfo.getLongCurPage()!=pageInfo.getLongGotoPage()&
        pageInfo.getLongGotoPage()>0){
      pageInfo.setLongCurPage(pageInfo.getLongGotoPage());
    }

  }

  /**
   *
   * @return long
   */
  public int returnCount(){
    return(int)((pageInfo.getLongCurPage()-1)*pageInfo.getLongRowsPerPage()+1);
  }

  /**
   *返回分页对象
   * @return PageInfo
   */
  public PageInfo getPageInfoTool(){
    ArrayList list=new ArrayList();
    PageInfo _pageinfo=new PageInfo();
    setlongCurPage(); //设置当前页
    try{
      if(!(returnCount()>getPagelistSize())){
        for(long i=getLongRowBegin()-1;i<pagelist.size();i++){
          if(i<getLongRowEnd()){
            list.add(pagelist.get((int)i));
          }
        }
      }
      _pageinfo.setLongCurPage(getLongCurPage());
      //_pageinfo.setLongGotoPage(getLongCurPage());
      _pageinfo.setLongPageTotal(getLongPageTotal());
      _pageinfo.setLongRowBegin(getLongRowBegin());
      _pageinfo.setLongRowEnd(getLongRowEnd());
      _pageinfo.setLongRowTotal(getLongRowTotal());
      _pageinfo.setCheckpageinfo(getCheckpageinfo());
      _pageinfo.setPageinfolist(list);
    }
    catch(Exception e){
      e.printStackTrace();
    }
    return _pageinfo;
  }

  public static void main(String[] args){
    SplitPage splitpage=new SplitPage();
    PageInfo pageinfo=new PageInfo();
    // pageinfo.setLongCurPage(3);//设置当前页
    //pageinfo.setLongRowsPerPage(4);//设置每页的记录数
    pageinfo.setLongGotoPage(5); //设置欲跳转页
    //pageinfo.setCheckpageinfo(0);

    ArrayList list=new ArrayList();
    list.add("1");
    list.add("2");
    list.add("3");
    list.add("4");
    list.add("5");
    list.add("6");
    list.add("7");
    list.add("8");
    list.add("9");
    list.add("10");
    splitpage.setPageInfo(pageinfo,list);
    PageInfo page=splitpage.getPageInfoTool();
    System.out.println("当前页getLongCurPage="+page.getLongCurPage());
    System.out.println("欲转到页getLongGotoPage="+page.getLongGotoPage());
    System.out.println("总页数getLongPageTotal="+page.getLongPageTotal());
    System.out.println("开始记录数getLongRowBegin="+page.getLongRowBegin());
    System.out.println("结束记录数getLongRowEnd="+page.getLongRowEnd());
    System.out.println("每页记录数getLongRowsPerPage="+page.getLongRowsPerPage());
    System.out.println("总记录数getLongRowTotal="+page.getLongRowTotal());
    System.out.println("翻页getCheckpageinfo="+page.getCheckpageinfo());
    System.out.println(page.getPageinfolist().toString());

  }

}