Java分页实现

public interface Paginable {

	public int getTotalCount();

	public int getPageCount();

	public int getPageSize();

	public int getCurrentPage();
	
	public int getStartIndex();

	public boolean isFirstPage();

	public boolean isLastPage();

	public int getNextPage();

	public int getPrePage();
}

public class SimplePage implements Paginable {

	public final static int PAGESIZE = 4;

	// Total count of records
	protected int totalCount;
	
	// The size of records per page
	protected int pageSize = PAGESIZE;
	
	// Current page
	protected int currentPage;
	
	// The count of pages
	private int pageCount;

	public SimplePage() {
	}
	
	public SimplePage(int totalCount) {
		setPageSize(PAGESIZE);
		setTotalCount(totalCount);
		setCurrentPage(1);
	}

	public SimplePage(int currentPage, int totalCount) {
		setPageSize(PAGESIZE);
		setTotalCount(totalCount);
		setCurrentPage(currentPage);
	}

	public SimplePage(int currentPage, int pageSize, int totalCount) {
		setPageSize(pageSize);
		setTotalCount(totalCount);
		setCurrentPage(currentPage);
	}

	public boolean isFirstPage() {
		return currentPage <= 1;
	}

	public boolean isLastPage() {
		return currentPage >= pageCount;
	}

	public int getNextPage() {
		if (isLastPage()) {
			return currentPage;
		} else {
			return currentPage + 1;
		}
	}

	public int getPrePage() {
		if (isFirstPage()) {
			return currentPage;
		} else {
			return currentPage - 1;
		}
	}

	public int getCurrentPage() {
		return currentPage;
	}
	
	public int getStartIndex() {
		return (currentPage - 1) * pageSize;
	}

	public void setCurrentPage(int currentPage) {
		if (totalCount <= 0)
			this.currentPage = 0;
		else if (currentPage >= pageCount)
			this.currentPage = pageCount;
		else if (currentPage <= 1)
			this.currentPage = 1;
		else {
			this.currentPage = currentPage;
		}
	}

	public int getPageSize() {
		return pageSize;
	}

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

	public int getTotalCount() {
		return totalCount;
	}

	public void setTotalCount(int totalCount) {
		if (totalCount > 0) {
			this.totalCount = totalCount;
			pageCount = totalCount / pageSize;
			if (totalCount % pageSize > 0)
				pageCount++;
		} else {
			this.totalCount = 0;
		}
	}

	public int getPageCount() {
		return pageCount;
	}

	public void setPageCount(int pageCount) {
		this.pageCount = pageCount;
	}
}

import java.util.List;

@SuppressWarnings("serial")
public class Pagination extends SimplePage implements java.io.Serializable,
		Paginable {

	public Pagination() {
	}

	@SuppressWarnings("unchecked")
	public Pagination(int totalCount, List list) {
		super(totalCount);
		this.list = list;
	}

	@SuppressWarnings("unchecked")
	public Pagination(int currentPage, int totalCount, List list) {
		super(currentPage, totalCount);
		this.list = list;
	}

	@SuppressWarnings("unchecked")
	public Pagination(int currentPage, int pageSize, int totalCount, List list) {
		super(currentPage, pageSize, totalCount);
		this.list = list;
	}

	public Pagination(int currentPage, int pageSize, int totalCount) {
		super(currentPage, pageSize, totalCount);
	}

	public int getFirstResult() {
		return (currentPage - 1) * pageSize;
	}

	@SuppressWarnings("unchecked")
	private List list;

	@SuppressWarnings("unchecked")
	public List getList() {
		return list;
	}

	@SuppressWarnings("unchecked")
	public void setList(List list) {
		this.list = list;
	}
}

public class PageUtil {

	public static String getPageBar1(Paginable page, String url) {
		String temp = "";
		if (url.indexOf("?") == -1) {
			temp = "?";
		} else {
			temp = "&";
		}
		StringBuffer pageBar = new StringBuffer();
		if (page.isFirstPage())
			pageBar.append("First Previous ");
		else {
			pageBar.append("<a href='").append(url).append(temp).append(
					"currentPage=1'>First</a>&nbsp;");
			pageBar.append("<a href='").append(url).append(temp).append(
					"currentPage=").append(page.getPrePage()).append(
					"'>Previous</a>&nbsp;");
		}
		if (page.isLastPage())
			pageBar.append("Next Last&nbsp;");
		else {
			pageBar.append("<a href='").append(url).append(temp).append(
					"currentPage=").append(page.getNextPage()).append(
					"'>Next</a>&nbsp;");
			pageBar.append("<a href='").append(url).append(temp).append(
					"currentPage=").append(page.getPageCount()).append(
					"'>Last</a>&nbsp;");
		}
		pageBar.append("&nbsp;Total Page:").append(page.getPageCount()).append(
				"&nbsp;");
		pageBar.append("&nbsp;Go<select name='page' onChange=\"location='");
		pageBar.append(url).append(temp).append(
				"currentPage='+this.options[this.selectedIndex].value\">");
		int begin = (page.getCurrentPage() > 10) ? page.getCurrentPage() - 10
				: 1;
		int end = (page.getPageCount() - page.getCurrentPage() > 10) ? page
				.getCurrentPage() + 10 : page.getPageCount();
		for (int i = begin; i <= end; i++) {
			if (i == page.getCurrentPage())
				pageBar.append("<option value='").append(i).append(
						"' selected>-").append(i).append("-</option>");
			else
				pageBar.append("<option value='").append(i).append("'>-")
						.append(i).append("-</option>");
		}
		pageBar.append("</select>");
		return pageBar.toString();
	}
	
	//Implement other page bar you wanted
	public static String getPageBar2(Paginable page, String url){
		return "";
	}
}

import java.io.Serializable;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Projections;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import page.Pagination;

public abstract class AbstractDaoManager extends HibernateDaoSupport {

	private boolean cacheQueries = false;

	private String queryCacheRegion;

	public void setCacheQueries(boolean cacheQueries) {
		this.cacheQueries = cacheQueries;
	}

	public void setQueryCacheRegion(String queryCacheRegion) {
		this.queryCacheRegion = queryCacheRegion;
	}

	public void save(final Object entity) {
		getHibernateTemplate().save(entity);
	}

	public void persist(final Object entity) {
		getHibernateTemplate().save(entity);
	}

	public void update(final Object entity) {
		getHibernateTemplate().update(entity);
	}

	public void delete(final Object entity) {
		getHibernateTemplate().delete(entity);
	}

	public Object load(final Class entity, final Serializable id) {
		return getHibernateTemplate().load(entity, id);
	}

	public Object get(final Class entity, final Serializable id) {
		return getHibernateTemplate().get(entity, id);
	}

	public List findAll(final Class entity) {
		return getHibernateTemplate().find("from " + entity.getName());
	}

	public List findByNamedQuery(final String namedQuery) {
		return getHibernateTemplate().findByNamedQuery(namedQuery);
	}

	public List findByNamedQuery(final String query, final Object parameter) {
		return getHibernateTemplate().findByNamedQuery(query, parameter);
	}

	public List findByNamedQuery(final String query, final Object[] parameters) {
		return getHibernateTemplate().findByNamedQuery(query, parameters);
	}

	public List find(final String query) {
		return getHibernateTemplate().find(query);
	}

	public List find(final String query, final Object parameter) {
		return getHibernateTemplate().find(query, parameter);
	}

	public Pagination findPageByCriteria(
			final DetachedCriteria detachedCriteria) {
		return findPageByCriteria(detachedCriteria, Pagination.PAGESIZE,
				0);
	}

	public Pagination findPageByCriteria(
			final DetachedCriteria detachedCriteria, final int startIndex) {
		return findPageByCriteria(detachedCriteria, Pagination.PAGESIZE,
				startIndex);
	}

	public Pagination findPageByCriteria(
			final DetachedCriteria detachedCriteria, final int pageSize,
			final int currentPage) {
		return (Pagination) getHibernateTemplate().execute(
				new HibernateCallback() {
					public Object doInHibernate(Session session)
							throws HibernateException {
						Criteria criteria = detachedCriteria
								.getExecutableCriteria(session);
						int totalCount = ((Integer) criteria.setProjection(
								Projections.rowCount()).uniqueResult())
								.intValue();
						criteria.setProjection(null);
						Pagination page = new Pagination(currentPage, pageSize, totalCount);
						List items = criteria.setFirstResult(page.getStartIndex())
								.setMaxResults(pageSize).list();
						page.setItems(items);
						return page;
					}
				});
	}
	public List findAllByCriteria(final DetachedCriteria detachedCriteria) {
		return (List) getHibernateTemplate().execute(new HibernateCallback() {
			public Object doInHibernate(Session session)
					throws HibernateException {
				Criteria criteria = detachedCriteria
						.getExecutableCriteria(session);
				return criteria.list();
			}
		});
	}

	public int getCountByCriteria(final DetachedCriteria detachedCriteria) {
		Integer count = (Integer) getHibernateTemplate().execute(
				new HibernateCallback() {
					public Object doInHibernate(Session session)
							throws HibernateException {
						Criteria criteria = detachedCriteria
								.getExecutableCriteria(session);
						return criteria.setProjection(Projections.rowCount())
								.uniqueResult();
					}
				});
		return count.intValue();
	}
}