不需要分页sql的PageVO

不需要分页查询sql，只用查询所有结果返回List集合，通过以下PageVO封装分页信息

package owp;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
/**
 * 不需要分页sql的分页
 * @author Jeason
 *
 * @param <T>
 */
public class PageVO2<T> implements Serializable{

	private static final long serialVersionUID = 4278419095873395253L;

	/**
	 * 分页大小
	 */
	private int pageSize;
	
	/**
	 * 页码
	 */
	private int pageIndex;
	
	/**
	 * 所有数据集合
	 */
	private List<T> allData;
	
	public PageVO2() {
		super();
	}

	public PageVO2(int pageSize,int pageIndex,List<T> allData) {
		this.pageSize = pageSize;
		this.pageIndex = pageIndex;
		this.allData = allData;
	}

	public int getPageSize() {
		return this.pageSize;
	}

	public void setPageSize(int pageSize) {
		this.pageSize = pageSize;
	}

	public int getPageIndex() {
		return this.pageIndex;
	}

	public void setPageIndex(int pageIndex) {
		this.pageIndex = pageIndex;
	}

	public List<T> getAllData() {
		return this.allData;
	}

	public void setAllData(List<T> allData) {
		this.allData = allData;
	}

	/**
	 * 获取分页数据集合
	 */
	public List<T> getPageDate() {
		int fromIndex = (this.pageIndex-1) * this.pageSize;
		int toIndex = this.pageIndex * this.pageSize;
		toIndex = toIndex > getCountRow() ? getCountRow() : toIndex;
		return this.allData.subList(fromIndex, toIndex);
	}

	/**
	 * 获取总行数
	 */
	public int getCountRow() {
		return this.allData.size();
	}

	/**
	 * 获取总页数
	 */
	public int getCountPage() {
		int row = getCountRow();
		if (row % this.pageSize == 0) {
		     return row / this.pageSize;
		}
		return row / this.pageSize + 1;
	}

	/**
	 * 是否第一页
	 */
	public boolean isFirst(){
            return ((getCountRow() == 0) || (this.pageIndex <= 1));
        }

	/**
	 * 是否最后一页
	 */
        public boolean isLast() {
    	    return ((getCountRow() == 0) || (this.pageIndex >= getCountPage()));
        }

        /**
	 * 上一页
	 */
        public int getPrevPage() {
	     if (this.pageIndex <= 1) {
	    	 return 1;
	     }
	     return this.pageIndex - 1;
	}

        /**
	 * 下一页
	 */
        public int getNextPage(){
	     if (this.pageIndex >= getCountPage()) {
	    	 return getCountPage();
	     }
	     return this.pageIndex + 1;
        }

        public static void main(String[] args) {
    	    List<String> list = new ArrayList<String>();
    	    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");
    	    list.add("11"); list.add("12");
	    PageVO2<String> po = new PageVO2<String>(5, 3,list);
	    System.out.println("总行数"+po.getCountRow());
	    System.out.println("总页数"+po.getCountPage());
	    System.out.println("上一页"+po.getPrevPage());
	    System.out.println("下一页"+po.getNextPage());
	    System.out.println("第一页吗？"+po.isFirst());
	    System.out.println("最后一页吗？"+po.isLast());
	    System.out.println(po.getPageDate());
	}
}