package com.lss.common.tag; 

import java.io.IOException; 

import javax.servlet.jsp.JspException; 
import javax.servlet.jsp.JspWriter; 
import javax.servlet.jsp.tagext.TagSupport; 

import com.lss.common.page.HtmlPage; 
import com.lss.common.page.Page; 
import com.lss.common.page.VariablePage; 

/** 
* 分页处理标签 
* 
* @description 
* @DATE 2012-3-11下午09:08:46 
*/ 
public class PageTag extends TagSupport { 
private int pageNo; 
private int pageSize = 10; 
private int totalSum; 
private int showPage = 10; 
private String url; 

public int getPageNo() { 
return pageNo; 
} 

public void setPageNo(int pageNo) { 
this.pageNo = pageNo; 
} 

public int getPageSize() { 
return pageSize; 
} 

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

public int getTotalSum() { 
return totalSum; 
} 

public void setTotalSum(int totalSum) { 
this.totalSum = totalSum; 
} 

public int getShowPage() { 
return showPage; 
} 

public void setShowPage(int showPage) { 
this.showPage = showPage; 
} 

public String getUrl() { 
return url; 
} 

public void setUrl(String url) { 
this.url = url; 
} 

@Override 
public int doEndTag() throws JspException { 
if (pageSize == 0) { 
return TagSupport.SKIP_PAGE;// 不显示分页 
} else if (pageSize > totalSum) { 
return TagSupport.SKIP_BODY;// 不显示分页 
} 
JspWriter out = pageContext.getOut(); 
try { 
if (url.indexOf(";jsessionid=") == -1) { 
if (url.indexOf("?") == -1) { 
url += ";jsessionid=" + pageContext.getSession().getId() + "?pageNo="; 
} else { 
url = url.replaceFirst("\?", ";jsessionid=" + pageContext.getSession().getId() + "?"); 
if (url.indexOf("pageNo=") == -1) { 
url += "&pageNo="; 
} 
} 
} 
url = pageContext.getServletContext().getContextPath() + url; 
VariablePage variablePage = new VariablePage(pageNo, totalSum, pageSize, url); 
variablePage.setShowPageNum(showPage); 
Page page = new HtmlPage(variablePage); 
out.print(page.getFirstNo() + " " + page.getBackpageNum() + " " + page.pagination() + " " + page.getNextpageNum() + " " + page.getLastNo()); 
} catch (IOException ex) { 
ex.printStackTrace(); 
} 
return super.doEndTag(); 
} 

@Override 
public void release() { 
url = null; 
pageNo = 0; 
totalSum = 0; 
pageSize = 10; 
super.release(); 
} 

private static final long serialVersionUID = -2642907859641024483L; 
}

/** 
* HTML 分页类 
* 
* @description 
* @DATE 2012-3-11下午10:33:14 
*/ 
public class HtmlPage extends Page { 
public HtmlPage(VariablePage variablePage) { 
super(variablePage); 
} 

public String pagination() { 
String printNo = ""; 
// 如果已分页；并且页数小于等于要显示的页数 
if (variablePage.totalPage > 1 && variablePage.totalPage  1 && variablePage.totalPage > variablePage.showPageNum) { 
if (variablePage.pageNo == 1) {// 当前页等于第一页 
return fromFirstPagePrint(); 
} else if (variablePage.pageNo == variablePage.totalPage) {// 当前页等于最后一页 
return fromLastPagePrint(); 
} else {// 如果当前页：即不是首页也不是尾页 
if (variablePage.showPageNum % 2 == 0) {// 可以平分页码 
int print$No = variablePage.showPageNum / 2; 
if (variablePage.pageNo >= print$No) { 
int index$No = variablePage.pageNo - print$No; 
if (variablePage.pageNo + print$No >= variablePage.totalPage) { 
return fromLastPagePrint(); 
} else { 
if (index$No == 0) 
index$No = 1; 
for (int i = index$No; i < (variablePage.showPageNum + index$No); i++) { 
if (i == variablePage.pageNo) {// 如果是当前页:不添加连接URL 
printNo += (i + variablePage.split); 
} else { 
printNo += (buildA(variablePage, i) + variablePage.split); 
} 
} 
} 
} else { 
return fromFirstPagePrint(); 
} 
} else {// 打印页数不是偶数时： 
int print$No = variablePage.showPageNum / 2 + 1; 
if (variablePage.pageNo >= print$No && variablePage.pageNo + print$No < variablePage.totalPage) { 
int index$No = variablePage.pageNo - print$No + 1; 
for (int i = index$No; i < variablePage.showPageNum + index$No; i++) { 
if (i == variablePage.pageNo) {// 如果是当前页:不添加连接URL 
printNo += (i + variablePage.split); 
} else { 
printNo += (buildA(variablePage, i) + variablePage.split); 
} 
} 
} else if (variablePage.pageNo