pagebean.java

java分页 参照别人自己做的 struts1

package page.test.pagebean;

import java.util.List;

public class PageBean {
	private List list;// 要返回的每一页的记录列表
	private int allRows;
	private int pageSize;
	private int totalPage;
	private int currentPage;

	private boolean isFirstPage;
	private boolean isLastPage;
	private boolean hasPreviousPage;
	private boolean hasNextPage;

	public List getList() {
		return list;
	}

	public void setList(List list) {
		this.list = list;
	}

	public int getAllRows() {
		return allRows;
	}

	public void setAllRows(int allRows) {
		this.allRows = allRows;
	}

	public int getPageSize() {
		return pageSize;
	}

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

	public int getTotalPage() {
		return totalPage;
	}

	public void setTotalPage(int totalPage) {
		this.totalPage = totalPage;
	}

	public int getCurrentPage() {
		return currentPage;
	}

	public void setCurrentPage(int currentPage) {
		this.currentPage = currentPage;
	}

	public void init() {
		this.isFirstPage = isFirstPage();
		this.isLastPage = isLastPage();
		this.hasNextPage = isHasNextPage();
		this.hasPreviousPage = isHasPreviousPage();
	}

	private boolean isHasPreviousPage() {
		// TODO Auto-generated method stub
		return currentPage != 1;
	}

	private boolean isHasNextPage() {
		// TODO Auto-generated method stub
		return currentPage != totalPage;
	}

	private boolean isLastPage() {
		// TODO Auto-generated method stub
		return currentPage == totalPage;
	}

	private boolean isFirstPage() {
		// TODO Auto-generated method stub
		return currentPage == 1;
	}

	// 计算总页数
	public static int countTotalPage(final int allRows, final int pageSize) {
		int totalPage = (allRows + pageSize - 1) / pageSize;
		return totalPage;
	}

	// 当前页
	public static int coutnCurrentPage(int page) {
		final int curPage = (page == 0 ? 1 : page);
		return curPage;
	}

	// 当前页的起始
	public static int countOffset(final int currentPage, final int pageSize) {
		final int offset = (currentPage - 1) * pageSize;
		return offset;
	}

}