分页控件 JSTL

第一步 用static方法来进行分页
JSP

<% Hashtable<String, String> map = new Hashtable<String, String>(); 
        	   map.put("fileName", fileName);
        	   map.put("startTime", startTime);
        	   map.put("endTime", endTime);
        	   map.put("fileStatus", fileStatus);%>
        	<%= PageHelper.NormalPager(request, 
        							  PageHelper.PER_PAGE_COUNT, 
        							  totalCount, 
        							  "summary.do",
        							  UrlUtils.getParameterString(map))%>

后台代码

public static String NormalPager(HttpServletRequest request, int pageSize,
			int totalCount, String actionName, String paramString) {
		return GeneratePager(request, pageSize, totalCount, actionName,
				paramString);
	}

public static String GeneratePager(HttpServletRequest request,
			int pageSize, int totalCount, String actionName, String paramString) {
		int totalPages = GetTotalPageCount(totalCount, pageSize);

		if (IsOnlyOnePage(totalPages)) {
			return "";
		}

		int currentPage = GetCurrentPage(request, totalPages);

		StringBuilder output = new StringBuilder();
		output.append("<div class='pagination'>");
		HandleFirstPage(output, currentPage, actionName, paramString);
		HandlePreviousPage(output, currentPage, actionName, paramString);
		HandlePagers(output, totalPages, currentPage, actionName, paramString);
		HandleNextPage(output, totalPages, currentPage, actionName, paramString);
		HandleLastPage(output, totalPages, currentPage, actionName, paramString);
		output.append("</div>");

		logger.debug(output.toString());

		return output.toString();
	}

private static int GetTotalPageCount(int totalCount, int pageSize) {
		logger.debug("totalCount:" + totalCount);
		logger.debug("pageSize:" + pageSize);
		return Math.max((totalCount + pageSize - 1) / pageSize, 1);
	}

private static void HandleFirstPage(StringBuilder output, int currentPage,
			String actionName, String paramString) {
		if (CurrentInFirstPage(currentPage)) {
			output.append("<span class='disabled'>First</span>");
		} else {
			output.append(String.format(
					"<a href='%1$s?page=%2$d&%3$s'>First</a>", actionName, 1,
					paramString));
		}
	}

private static void HandleNextPage(StringBuilder output, int totalPages,
			int currentPage, String actionName, String paramString) {

		if (CurrentInLastPage(currentPage, totalPages)) {
			output.append("<span class='disabled'>next</span>");
		} else {
			output.append(String.format(
					"<a href='%1$s?page=%2$d&%3$s'>next</a>", actionName,
					currentPage + 1, paramString));
		}
	}

第二步 用JSTL来包装该静态方法
JSP

<p:page id="${SummaryCISBean.batchId }" startTime="${SummaryCISBean.startTime}" endTime="${SummaryCISBean.endTime}" 
            status="${SummaryCISBean.batchStatus}" totalCount="${SummaryCISBean.totalCount}" currentPage="${page}" />

tld

<?xml version="1.0" encoding="UTF-8"?>
<taglib version="2.0" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee web-jsptaglibrary_2_0.xsd">
  <tlib-version>1.0</tlib-version>
  <short-name>p</short-name>
  <uri>/WEB-INF</uri>
  
  <tag>
    <name>page</name>
    <tag-class>test.CIMPageTag</tag-class>
    <body-content>empty</body-content>
    <attribute>
      <name>id</name>
      <required>true</required>
      <rtexprvalue>true</rtexprvalue>
      <type>java.lang.String</type>
    </attribute>
    <attribute>
      <name>status</name>
      <required>true</required>
      <rtexprvalue>true</rtexprvalue>
      <type>java.lang.String</type>
    </attribute>
    <attribute>
      <name>startTime</name>
      <required>true</required>
      <rtexprvalue>true</rtexprvalue>
      <type>java.lang.String</type>
    </attribute>
     <attribute>
      <name>endTime</name>
      <required>true</required>
      <rtexprvalue>true</rtexprvalue>
      <type>java.lang.String</type>
    </attribute>
     <attribute>
      <name>currentPage</name>
      <required>true</required>
      <rtexprvalue>true</rtexprvalue>
      <type>java.lang.String</type>
    </attribute>
     <attribute>
      <name>totalCount</name>
      <required>true</required>
      <rtexprvalue>true</rtexprvalue>
      <type>java.lang.String</type>
    </attribute>
        
  </tag>
</taglib>

Tag类

package test;

import java.io.IOException;
import java.util.Hashtable;

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

import org.apache.commons.lang.StringUtils;

import com.hp.ucmdb.adapter.util.PageHelper;
import com.hp.ucmdb.adapter.util.UrlUtils;


public class CIMPageTag extends SimpleTagSupport {

	String id;
	String status;
	String startTime;
	String endTime;
	String currentPage;
	String totalCount;

    public void doTag() throws JspException {
    	System.out.println(toString());
    	
       Hashtable<String, String> map = new Hashtable<String, String>(); 
       map.put("batchId", StringUtils.defaultString(id));
 	   map.put("startTime", StringUtils.defaultString(startTime));
 	   map.put("endTime", StringUtils.defaultString(endTime));
 	   map.put("batchStatus", StringUtils.defaultString(status));
 	   currentPage="".equals(currentPage)?"1":currentPage;
 	  JspWriter out=getJspContext().getOut();
 	  try {
		out.write(PageHelper.NormalPager(Integer.valueOf(currentPage), 
								  PageHelper.PER_PAGE_COUNT, 
								  Integer.valueOf(totalCount), 
								  "summary_cis.do",
								  UrlUtils.getParameterString(map)));
	} catch (Exception e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} 
 	   
    }

	@Override
	public String toString() {
		
		
		return "CISPageTag [id=" + id + ", status=" + status + ", startTime="
				+ startTime + ", endTime=" + endTime + ", currentPage="
				+ currentPage + ", totalCount=" + totalCount + "]";
	}

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getStatus() {
		return status;
	}

	public void setStatus(String status) {
		this.status = status;
	}

	public String getStartTime() {
		return startTime;
	}

	public void setStartTime(String startTime) {
		this.startTime = startTime;
	}

	public String getEndTime() {
		return endTime;
	}

	public void setEndTime(String endTime) {
		this.endTime = endTime;
	}

	public String getCurrentPage() {
		return currentPage;
	}

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

	public String getTotalCount() {
		return totalCount;
	}

	public void setTotalCount(String totalCount) {
		this.totalCount = totalCount;
	}   
}