封装分页控件

import java.util.List;
/**
* 用户封装分页查询数据的类
* 通过构造方法来初始化一个分页信息对象供JSP页面使用
* @author gjf
*
*/
@SuppressWarnings("serial")
public class PageInfo extends BaseObject {
private int pageIndex; // 当前第几页数据
private int pageSize;     //每页要显示的最大记录个数
private int recordeCount; // 满足查询条件的总记录数
private int pageCount; // 满足条件的总页数
@SuppressWarnings("rawtypes")
private List pageData; // 当前查询的分页数据
private boolean hasPreviousPage;  //是否有上一页

private boolean hasNextPage; //是否有下一页

/**
* 唯一可用的初始化分页信息的构造方法
* @param pageData    分页后的查询数据
* @param recordeCount    //满足查询条件的总记录数
* @param pageIndex    当前查询的是第几页的数据
* @param pageSize    每页要显示的最大记录个数
*/
@SuppressWarnings("rawtypes")
public PageInfo(List pageData, int recordeCount, int pageIndex, int pageSize) {
this.pageData = pageData;
this.recordeCount = recordeCount;
this.pageIndex = pageIndex;
this.pageSize = pageSize;

//计算总页数
pageCount = (recordeCount + pageSize - 1) / pageSize;

//对于最后一页，计算实际的记录个数，因此最后一页的记录个数不一定等于设定的最大记录个数
if(pageIndex == pageCount) {
this.pageSize = recordeCount - ((pageCount - 1) * pageSize);
}
this.setHasNextPage(this.isNextPageEnable());
this.setHasPreviousPage(this.isPreviousPageEnable());
}

public int getPageIndex() {
return pageIndex;
}

public int getPageSize() {
return pageSize;
}

public int getRecordeCount() {
return recordeCount;
}

public int getPageCount() {
return pageCount;
}

@SuppressWarnings("rawtypes")
public List getPageData() {
return pageData;
}

public boolean isNextPageEnable() {
return this.setHasNextPage(pageIndex < pageCount);
}

public boolean isPreviousPageEnable() {
return this.setHasPreviousPage(pageIndex > 1);
}

public boolean setHasPreviousPage(boolean hasPreviousPage) {
this.hasPreviousPage = hasPreviousPage;
return hasPreviousPage;
}

public boolean isHasPreviousPage() {
return hasPreviousPage;
}

public boolean setHasNextPage(boolean hasNextPage) {
this.hasNextPage = hasNextPage;
return hasNextPage;
}

public boolean isHasNextPage() {
return hasNextPage;
}

}

import java.io.Serializable;

import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.apache.commons.lang.builder.ToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;

/**
* 基础ENTITY类
* 只实现equal()、hashCoce()、toString()方法
* @author gjf
*
*/
public abstract class BaseObject implements Serializable{
private static final long serialVersionUID = -1L;

public boolean equals(Object obj) {
return EqualsBuilder.reflectionEquals(this, obj);
}

public int hashCode() {
return HashCodeBuilder.reflectionHashCode(this);
}

public String toString() {
return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
}
}

public interface IXxxService {

public List<Xxx> getXxxs(int id,int startIndex,int endIndex);

public int countXxx();
}

List<Xxx> list=_ixxxService.getXxx(id,(pageIndex - 1) *pageSize,pageSize);//_ixxxServic 实现类对象
pageInfo=new PageInfo(list, rowCount, pageIndex, pageSize);

　　　　　　<s:iterator value="pageInfo.pageData" var="item" status="sta">//struts2标签
<table width="100%" border="0" cellspacing="0" cellpadding="0"
class="dd_main">
<tr>
<td width="12%" align="center">${item.属性}</td>
</tr>
</table>
</s:iterator>

<p:page url="your url"
pageInfo="${pageInfo }" />