分页基于Struts

来源：互联网发布：蔡晨数据编辑：程序博客网时间：2024/06/03 16:31

第一：自定义一个分页的类：

package com.ygkq.usermanager.view.taglib;

import java.io.IOException;
import java.util.Locale;

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

public class DoFenYeTaglib extends SimpleTagSupport {
private int pageNum;
private int totalPage;
private String className;
private String para;
private String functionName;

String languageDefault = Locale.getDefault().getLanguage();
public String getFunctionName() {
return functionName;
}

public void setFunctionName(String functionName) {
this.functionName = functionName;
}

public String getPara() {
return para;
}

public void setPara(String para) {
this.para = para;
}

public int getPageNum() {
return pageNum;
}

public void setPageNum(int pageNum) {
this.pageNum = pageNum;
}

public int getTotalPage() {
return totalPage;
}

public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}

public String getClassName() {
return className;
}

public void setClassName(String className) {
this.className = className;
}

public void doTag() throws JspException, IOException {
JspWriter out = this.getJspContext().getOut();
if (languageDefault == "zh" || languageDefault.equals("zh")){
   if (pageNum > 1)
   {
    out.print("<a href='"+className+".do?"+para+"="+functionName+"&pageNum=1'>首页  </a>");
    out.print("<a href='"+className+".do?"+para+"="+functionName+"&pageNum="+(pageNum-1)+"'>  上页  </a>");
   }
   if (pageNum < totalPage)
   {
    out.print("<a href='"+className+".do?"+para+"="+functionName+"&pageNum="+(pageNum+1)+"'>  下页  </a>");
    out.print("<a href='"+className+".do?"+para+"="+functionName+"&pageNum="+totalPage+"'>  末页</a>");
   }
}else{
   if (pageNum > 1)
   {
    out.print("<a href='"+className+".do?"+para+"="+functionName+"&pageNum=1'> Home   </a>");
    out.print("<a href='"+className+".do?"+para+"="+functionName+"&pageNum="+(pageNum-1)+"'>   Previous   </a>");
   }
   if (pageNum < totalPage)
   {
    out.print("<a href='"+className+".do?"+para+"="+functionName+"&pageNum="+(pageNum+1)+"'>   Next   </a>");
    out.print("<a href='"+className+".do?"+para+"="+functionName+"&pageNum="+totalPage+"'>   End </a>");
   }
}
super.doTag();
}
}

Action 里面的某个方法;

//用户查询充值记录
@SuppressWarnings("unchecked")
public ActionForward getAll(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {

HttpSession session = request.getSession();
int count = 2;
String pageNumStr = request.getParameter("pageNum");
if (pageNumStr == null)
pageNumStr = "1";

int pageNum = Integer.parseInt(pageNumStr);
int start = count * (pageNum - 1);

ServletContext application = request.getSession().getServletContext();
WebApplicationContext webContext = WebApplicationContextUtils
    .getRequiredWebApplicationContext(application);
UserService mems = (UserService) webContext
.getBean("userService");

UserBasic luser = (UserBasic)session.getAttribute("user");
String cn = luser.getCn();

List allLogs = null;
int allCounts = 0;
int allpage = 0;

try {
   allLogs = mems.getAllByCn(cn,count, start);
   allCounts = mems.getAllLogNumByCn(cn);
   allpage = (allCounts + count - 1) / count;

   request.setAttribute("allLogs", allLogs);
   request.setAttribute("pageNum", pageNum);
   request.setAttribute("allpage", allpage);
   request.setAttribute("allCounts", allCounts);

   return mapping.findForward("query_ok");
} catch (RuntimeException e) {
   logger.error(e);
   return mapping.findForward("error");
}
}

在 WEB-INF下面新建一个mytag.tld文件

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN" "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">
<taglib>
<tlibversion>1.2</tlibversion>
<jspversion>1.1</jspversion>
<shortname>my</shortname>

<tag>
<name>fenye</name>
<tagclass>com.ygkq.usermanager.view.taglib.DoFenYeTaglib</tagclass>
<bodycontent>empty</bodycontent>

<attribute>
   <name>pageNum</name>
   <required>false</required>
   <rtexprvalue>true</rtexprvalue>
</attribute>
<attribute>
   <name>totalPage</name>
   <required>false</required>
   <rtexprvalue>true</rtexprvalue>
</attribute>
<attribute>
   <name>className</name>
   <required>false</required>
   <rtexprvalue>true</rtexprvalue>
</attribute>
<attribute>
   <name>para</name>
   <required>false</required>
   <rtexprvalue>true</rtexprvalue>
</attribute>
   <attribute>
   <name>functionName</name>
   <required>false</required>
   <rtexprvalue>true</rtexprvalue>
</attribute>

</tag>

</taglib>

最后就是JSP页面了；

在JSP前面声明一下这个标签的位置

<%@ taglib uri="/WEB-INF/mytag.tld" prefix="f"%>

这些事从struts里面传出来的

int pageNum = (Integer) request.getAttribute("pageNum");
int allpage = (Integer) request.getAttribute("allpage");
int allCounts = (Integer) request.getAttribute("allCounts");
List allLogs = (List) request.getAttribute("allLogs");

接着就是分页的标签引用了...

<center>
       <f:fenye className="doUser" para="opers" functionName="getAll" pageNum="<%=pageNum%>" totalPage="<%=allpage %>" /></center>
                    
      <bean:message key="total"/> <%=allCounts %> <bean:message key="tiao"/>  <bean:message key="di"/> <%=pageNum %> / <%=allpage %> <bean:message key="page"/>

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/Jerry_BJ/archive/2010/06/02/5642447.aspx