Struts2自定义分页标签

package com.test.page;

import java.io.IOException;
import java.io.Writer;

import javax.servlet.http.HttpServletRequest;
package com.test.page;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.components.Component;
import org.apache.struts2.views.jsp.ComponentTagSupport;
import com.opensymphony.xwork2.util.ValueStack;

public class PageTag extends ComponentTagSupport  {
	
	private static final long serialVersionUID = -5371048231966321759L;
	
	private int pageCount;
	/**当前页码**/
	private int pageIndex;

	/**每页记录数**/
	private int pageSize = 10;
 
	/**总记录数**/
	private int totalCount;
	/**页码上的地址**/
	private String url;

	
	@Override  
    public Component getBean(ValueStack arg0, HttpServletRequest arg1, HttpServletResponse arg2) {   
        return new Page(arg0);  
    }

	
	/**
	 * @return the pageCount
	 */
	public int getPageCount() {
		return pageCount;
	}

	/**
	 * @return the pageIndex
	 */
	public int getPageIndex() {
		return pageIndex;
	}
 
	/**
	 * @return the pageSize
	 */
	public int getPageSize() {
		return pageSize;
	}
 
	/**
	 * @return the totalCount
	 */
	public int getTotalCount() {
		return totalCount;
	}

 
	/**
	 * @return the url
	 */
	public String getUrl() {
		return url;
	}
 
	//获得参数   
    @Override
	protected void populateParams() {   
        super.populateParams();   
        Page pages = (Page)component;
        pages.setPageIndex(this.pageIndex);//当前页
        pages.setPageSize(this.pageSize);//每页记录数
        pages.setTotalCount(this.totalCount);//总记录数
        pages.setPageCount(this.pageCount);//总页数
        pages.setUrl(this.url);
        
    }
 
	/**
	 * @param pageCount the pageCount to set
	 */
	public void setPageCount(int pageCount) {
		this.pageCount = pageCount;
	}
 
	/**
	 * @param pageIndex the pageIndex to set
	 */
	public void setPageIndex(int pageIndex) {
		this.pageIndex = pageIndex;
	}
 
	/**
	 * @param pageSize the pageSize to set
	 */
	public void setPageSize(int pageSize) {
		this.pageSize = pageSize;
	}
 
	/**
	 * @param totalCount the totalCount to set
	 */
	public void setTotalCount(int totalCount) {
		this.totalCount = totalCount;
	}
 
	/**
	 * @param url the url to set
	 */
	public void setUrl(String url) {
		this.url = url;
	}   
  
    
   
}

 
 

package com.test.page;

import org.apache.log4j.Logger;
 
public class PageUtil {
	
	/** 
	 * logger:日志对象
	 */
	
	private static final Logger logger = Logger.getLogger(PageUtil.class);
	
	 
 
	public static PageBean getPage(Object obj[], Object objValue[], int pageIndex,int pageSize, String uri) {

		if (logger.isDebugEnabled()) {
			logger.debug("Begin to getPage");
		}
		
		//获取请求路径
		String reqeustURL = uri;
		StringBuffer urlBuffer = new StringBuffer();
	 
		if (obj != null && objValue != null && obj.length > 0) {
			for (int i = 0; i < obj.length; i++) {
				for (int j = i; j == i; j++) {
					String strValue=String.valueOf(objValue[j]);
					if (i == 0) {
						urlBuffer.append("?" + obj[i] + "=" + repliceValue(strValue));
					}else {
						 urlBuffer.append("&" + obj[i] + "=" + repliceValue(strValue));
				    }				    	
				}
			}
		}
		String URL = urlBuffer.toString();
		if (null != URL) {
			reqeustURL = reqeustURL + URL;
		}
		//Page()构造方法参数:1:pageIndex 当前页,2:pagesize 每页数据;3:RUL 请求路径
		PageBean pageBean = new PageBean(pageIndex, pageSize, reqeustURL);
		
		if (logger.isDebugEnabled()) {
			logger.debug("End to getPage");
		}
		return pageBean;
	}
	
 
	private static Object repliceValue(Object obj){
		
	    try {
	    	if(StringUtil.isEmpty(obj)){
			  obj=String.valueOf(obj).replaceAll(String.valueOf(obj), "");
			}
			
		} catch (Exception e) {
			logger.warn(e.getMessage(),e);
		}
		
		return obj;
	}
	
}

 
package com.surfilter.accesspoint.pageutil;

import javax.servlet.http.HttpServletRequest;

public class WebUtil
{
	
	 
	public static int getIntByRequestParament(final HttpServletRequest request,
			final String param, final int defaultvalue)
	{

		try
		{
			return Integer.parseInt(request.getParameter(param));
		}
		catch (Exception e)
		{
			return defaultvalue;
		}
	}
	
}

 
import org.apache.log4j.Logger;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.components.Component;
import com.opensymphony.xwork2.util.ValueStack;

public class Page extends Component {
	

	/**当前页码的显示样式 如果外面不指定，将默认为显示**/
	private String curPageNumberStyle = "pagenumbervisited";
	/**带链接的页码的显示样式 如果外面不指定，将按默认值 **/
	private String linkPageNumberStyle = "pagenumber";

	private int pageCount;

	/**当前页码**/
	private int pageIndex;
	
	/**每页记录数**/
	private int pageSize = 10;
	/**总记录数**/
	private int totalCount;
	
	/**页码上的地址**/
	private String url;

	//获取值栈中的参数值
	public Page(ValueStack stack) {
		super(stack);
	}
	
	/******************辅助方法*****************/
	private String conversionUrl(final String url, final int pageIndex) {
	
		if (url == null || url.length() < 1) {
			return "login.jsp";
		}
		if (url.indexOf('*') > -1) {
			return url.replace("*", String.valueOf(pageIndex));
		}
		else {
			StringBuffer sb = new StringBuffer(url);
			if (sb.indexOf("?") > -1) {
				char c = sb.charAt(sb.length() - 1);
				if (c == '?' || c == '&') {
					sb.append("pageIndex=" + pageIndex);
				}
				else {
					sb.append("&pageIndex="+ pageIndex);
				}
			}
			else {
				sb.append("?pageIndex=" + pageIndex);
			}
			return sb.toString();
		}
	}
	
	/**
	 * @return the curPageNumberStyle
	 */
	public String getCurPageNumberStyle() {
		return curPageNumberStyle;
	}

	/**
	 * @return the linkPageNumberStyle
	 */
	public String getLinkPageNumberStyle() {
		return linkPageNumberStyle;
	}
 
	/**
	 * @return the pageCount
	 */
	public int getPageCount() {
		return pageCount;
	}
	
	/**
	 * @return the pageIndex
	 */
	public int getPageIndex() {
		return pageIndex;
	}
 
	/**
	 * @return the pageSize
	 */
	public int getPageSize() {
		return pageSize;
	}
 
	/**
	 * @return the totalCount
	 */
	public int getTotalCount() {
		return totalCount;
	}
 
	/**
	 * @return the url
	 */
	public String getUrl() {
		return url;
	}
 
	/**
	 * @param curPageNumberStyle the curPageNumberStyle to set
	 */
	public void setCurPageNumberStyle(String curPageNumberStyle) {
		this.curPageNumberStyle = curPageNumberStyle;
	}
 
	/**
	 * @param linkPageNumberStyle the linkPageNumberStyle to set
	 */
	public void setLinkPageNumberStyle(String linkPageNumberStyle) {
		this.linkPageNumberStyle = linkPageNumberStyle;
	}
 
	/**
	 * @param pageCount the pageCount to set
	 */
	public void setPageCount(int pageCount) {
		this.pageCount = pageCount;
	}
 
	/**
	 * @param pageIndex the pageIndex to set
	 */
	public void setPageIndex(int pageIndex) {
		this.pageIndex = pageIndex;
	}
 
	/**
	 * @param pageSize the pageSize to set
	 */
	public void setPageSize(int pageSize) {
		this.pageSize = pageSize;
	}
	
	/**
	 * @param totalCount the totalCount to set
	 */
	public void setTotalCount(int totalCount) {
		this.totalCount = totalCount;
	}
	
	/**
	 * @param url the url to set
	 */
	public void setUrl(String url) {
		this.url = url;
	}
	
	@Override
	public boolean start(Writer writer) {
		//在标签类中定义Request对象 
		HttpServletRequest request =ServletActionContext.getRequest();
		String curPath = request.getContextPath();
		boolean result = super.start(writer);
		try {
			StringBuilder str = new StringBuilder();
			
			str.append("<table width='100%' border='0' cellspacing='0' cellpadding='0'>");
			str.append("<tr>");
			
			str.append("<td class='STYLE4'>&nbsp;&nbsp;共有 " +this.pageCount
					+ " 页,当前第 ");
			str.append(this.pageIndex + "页共" +this.totalCount + "条每页"
					+ this.pageSize+ "条</td>");
			str.append("<td>");
			str
					.append("<table border='0' align='right' cellpadding='0' cellspacing='0'>");
			str.append("<tr>");
			
			// 如果当前页码大于1时，应该输出开始一页和上一页的连接
			if (this.pageIndex > 1) {
				
				// 首页
				String firstPageURL = this.conversionUrl(this.url, 1);
				String firstHref = "<a title='首页' href=" + firstPageURL
						+ " style='text-decoration: none;'>";
				String firstImg = "<img src='"+curPath+"/images/table/first.gif' width='37' height='15' border='0'/></a>";
				str.append("<td width='40'>" + firstHref + firstImg + "</td>");
				// 上一页
				String backPageURL = this.conversionUrl(this.url,
						this.pageIndex - 1);
				String backHref = "<a title='上一页' href=" + backPageURL
						+ " style='text-decoration: none;'>";
				String backImg = "<img src='"+curPath+"/images/table/back.gif' width='43' height='15' border='0'/></a>";
				str.append("<td width='45'>" + backHref + backImg + "</td>");
				
			}
			
			// 只要没有进到最后一页，都应该输出下一面和最后一页连接
			if (this.pageIndex <this.pageCount) {
				
				// 下一页
				String nextPageURL = this.conversionUrl(this.url,
						this.pageIndex + 1);
				String nextHref = "<a title='下一页' href=" + nextPageURL
						+ " style='text-decoration: none;'>";
				String nextImg = "<img src='"+curPath+"/images/table/next.gif' width='43' height='15' border='0'/></a>";
				str.append("<td width=\"45\">" + nextHref + nextImg + "</td>");
				// 最后一页
				String lastPageURL = this.conversionUrl(this.url,
						this.pageCount);
				String lastHref = "<a title='最后一页' href=" + lastPageURL
						+ " style='text-decoration: none;'>";
				String lastImg = "<img src='"+curPath+"/images/table/last.gif' width='37' height='15' border='0'/></a>";
				str.append("<td width=\"40\">" + lastHref + lastImg + "</td>");
				
			}
			str.append("</tr>");
			str.append("</table>");
			str.append("</td>");
			str.append("</tr>");
			str.append("</table>");
			
			writer.write(str.toString());
			
		} catch (IOException ex) {
			Logger.getLogger(Page.class.getName()).log(null, ex);
		}
		return result;
	}
	
}

 

package com.test.page;


public class PageBean{
	

	/**URL上页码参数**/
	public static String pageNumberParameterName = "pageIndex";
 
	 
    /**当前页码**/
	private int pageIndex;

	/**每页记录数**/
	private int pageSize = 10;
  
	/**
	 * @Fields pageTotalCount :总页数
	 */
	private int pageTotalCount;
	
	/**总记录数**/
	private int totalCount;

	
	/**页码上的地址**/
	private String url;

	public PageBean() {

	}

	/**
	 * Index starts from 1, 2, 3...
	 */
	public PageBean(final int pageIndex) {

		this.pageIndex = pageIndex;
	}
	
	/**
	 * Index starts from 1, 2, 3...
	 */
	public PageBean(final int pageIndex, final int pageSize) {

		this.pageIndex = pageIndex;
		this.pageSize = pageSize;
	}
	
	/**
	 * 带URL地址构造方法，最常用的一种

	 * @param pageIndex  当前页

	 * @param pageSize   每页记录数

	 * @param url        URL地址
	 */
	public PageBean(final int pageIndex, final int pageSize, final String url) {

		this.pageIndex = pageIndex;
		this.pageSize = pageSize;
		this.url = url;
	}
	
	/**
	 * 开始页
	 * @return
	 */
	public int getFirstIndex() {

		return (this.pageIndex - 1) * this.pageSize;
	}
	
	public boolean getHasNext() {

		return this.pageIndex < this.getPageCount();
	}

	public boolean getHasPrevious() {

		return this.pageIndex > 1;
	}

	public int getLastIndex() {
		
		int n = this.getFirstIndex() + this.pageSize;
		if (n > this.totalCount) {
			n = this.totalCount;
		}
		return n;
	}

	public int getPageCount() {

		if (this.totalCount == 0) {
			return 0;
		}
		int pageCount=this.totalCount / this.pageSize+ (this.totalCount % this.pageSize == 0 ? 0 : 1);
		setPageTotalCount(pageCount);
		return pageCount;
	}

	public int getPageIndex() {

		return this.pageIndex;
	}

	public int getPageSize() {

		return this.pageSize;
	}
 
	/**
	 * @return the pageTotalCount
	 */
	public int getPageTotalCount() {
		return pageTotalCount;
	}

	public int getTotalCount() {

		return this.totalCount;
	}
 
	public String getUrl() {

		return this.url;
	}

	public boolean isEmpty() {

		return this.totalCount == 0;
	}

	public void setPageIndex(final int pageIndex) {

		this.pageIndex = pageIndex;
	}

	 
	/**
	 * @param pageTotalCount the pageTotalCount to set
	 */
	public void setPageTotalCount(int pageTotalCount) {
		this.pageTotalCount = pageTotalCount;
	}

	public void setTotalCount(final int totalCount) {

		this.totalCount = totalCount;
	}

	public void setUrl(final String url) {

		this.url = url;
	}

	
}