page.java

一个关于物流的管理系统

package com.shunshi.ssh.entity;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
//@SuppressWarnings("serial")
public class Page implements Serializable{
		public static int DEFAULT_PAGE_SIZE =20;

		private int pageSize = DEFAULT_PAGE_SIZE; 

		private long start; 

		private Object data; 

		private long totalCount; 

		
		public Page() {
			this(0, 0, DEFAULT_PAGE_SIZE, new ArrayList());
		}

		
		public Page(long start, long totalSize, int pageSize, Object data) {
			this.pageSize = pageSize;
			this.start = start;
			this.totalCount = totalSize;
			this.data = data;
		}

		
		public long getTotalCount() {
			return this.totalCount;
		}

		
		public long getTotalPageCount() {
			if (totalCount % pageSize == 0)
				return totalCount / pageSize;
			else
				return totalCount / pageSize + 1;
		}

		
		public int getPageSize() {
			return pageSize;
		}

		
		public Object getResult() {
			return data;
		}

		
		public long getCurrentPageNo() {
			return start / pageSize + 1;
		}

		
		public boolean hasNextPage() {
			return this.getCurrentPageNo() < this.getTotalPageCount() - 1;
		}

		
		public boolean hasPreviousPage() {
			return this.getCurrentPageNo() > 1;
		}

		
		protected static int getStartOfPage(int pageNo) {
			return getStartOfPage(pageNo, DEFAULT_PAGE_SIZE);
		}

		
		public static int getStartOfPage(int pageNo, int pageSize) {
			return (pageNo - 1) * pageSize;
		}

	}