web使用displaytag显示表格(提供排序,链接,下载等等)

 

DisplayTag是一个开源的自定义标签库（CustomTaglib），他提供了直接而有效的格式化web视图层数据的有效手段。你可以在现在流行的web应用的MVC模式中集成DisplayTag到View层，其提供的强大表格格式化功能一定会令你爱不释手。或许上面说的有些夸张了，但是DisplayTag在表格的格式化方面表现确实出色，当然，他也只能显示表格，视图层的大部分工作不就是使用表格来格式化数据嘛！

 

 

项目结构图，如图一：

第一步，新建com.action.ProductsAction.java这个类， 用来得到一个List<Product>的list对象，实际开发中，这个list将是从数据库中获得

 

 ProductsAction.java：

 

package com.action;import java.util.ArrayList;import java.util.Date;import java.util.List;import com.bean.Product;import com.opensymphony.xwork2.ActionSupport;public class ProductsAction extends ActionSupport{    private List<Product>list;    public List<Product> getList()    {        return list;    }    public void setList(List<Product> list)    {        this.list = list;    }    public String execute()    {        list=new ArrayList<Product>();        for (int i = 0; i < 80; i++)        {            Product product=new Product();            product.setEmail("http://email"+"--"+i);            product.setMoney(10000.00+i);            product.setName("商品"+"--"+i);            product.setNum("isbn"+"--"+i);            product.setTime(new Date());            product.setUrl("www.google.com");            list.add(product);        }        System.out.println("数据共有"+list.size()+"条");        return SUCCESS;    }}

 

 

 

第二步，新建Product的javabean：

package com.bean;import java.util.Date;public class Product{    private String num;    private String name;    private String email;    private double money;    private String url;    private Date time;//getter，setter略}

 

 

 

第三步，新建properties资源文件，并配置struts.xml

 

displaytag_zh_CN.properties：basic.empty.showtable=falsebasic.show.header=true# page | listsort.amount=list# \u5bfc\u51fa\u8303\u56f4\u8bbe\u7f6e\uff0clist\u4e3a\u5168\u90e8\uff0cpage\u4e3a\u9875\u9762export.amount=listexport.decorated=truepaging.banner.group_size=8# \u4fee\u6539\u5206\u9875\u5bfc\u822a\u6761\u663e\u793a\u7684\u4f4d\u7f6e\uff0ctop\u4e3a\u9876\u90e8\uff0cbottom\u4e3a\u5e95\u90e8\uff0cboth\u4e3a\u9876\u90e8\u548c\u5e95\u90e8paging.banner.placement=bottomcss.tr.even=evencss.tr.odd=oddcss.th.sorted=sortedcss.th.ascending=order1css.th.descending=order2css.table=css.th.sortable=sortable# factory classes for extensionsfactory.requestHelper=org.displaytag.util.DefaultRequestHelperFactory# factory class for decoratorsfactory.decorator=org.displaytag.decorator.DefaultDecoratorFactory# locale provider (Jstl provider by default)locale.provider=org.displaytag.localization.I18nJstlAdapter# locale.resolver (nothing by default, simply use locale from request)#locale.resolver=export.types=csv excel xml pdfexport.csv.class=org.displaytag.export.CsvViewexport.excel.class=org.displaytag.export.ExcelViewexport.xml.class=org.displaytag.export.XmlViewexport.pdf.class=org.displaytag.export.PdfViewexport.csv=trueexport.csv.label=<span class="export csv">CSV </span>export.csv.include_header=falseexport.csv.filename=instence.csvexport.excel=trueexport.excel.label=<span class="export excel">Excel </span>export.excel.include_header=trueexport.excel.filename=instence.xlsexport.xml=trueexport.xml.label=<span class="export xml">XML </span>export.xml.filename=instence.xmlexport.pdf=trueexport.pdf.label=<span class="export pdf">PDF </span>export.pdf.include_header=trueexport.pdf.filename=instence.pdfexport.rtf=trueexport.rtf.label=<span class="export rtf">RTF </span>export.rtf.include_header=trueexport.rtf.filename=instence.rtf# \u5206\u9875\u5bfc\u822a\u6761\u8bbe\u7f6ebasic.msg.empty_list=\u6CA1\u6709\u8BB0\u5F55\u53EF\u663E\u793Abasic.msg.empty_list_row=<tr class\="empty"><td colspan\="{0}">\u6CA1\u6709\u8BB0\u5F55\u53EF\u663E\u793A</td></tr>error.msg.invalid_page=invalid page# \u5bfc\u51fa\u5bfc\u822a\u6761\u8bbe\u7f6eexport.banner=<div class\="exportlinks">\u5BFC\u51FA\u81F3\: {0}</div># \u5206\u5272\u7b26export.banner.sepchar= ||paging.banner.item_name=\u6761\u8BB0\u5F55paging.banner.items_name=\u6761\u8BB0\u5F55paging.banner.no_items_found=<span class\="pagebanner">\u6CA1\u6709\u8BB0\u5F55\u88AB\u627E\u5230.</span>paging.banner.one_item_found=<span class\="pagebanner">\u53EA\u6709\u4E00\u6761\u8BB0\u5F55\u88AB\u627E\u5230.</span>paging.banner.all_items_found=<span class\="pagebanner">{0} {1} \u88AB\u627E\u5230, \u672C\u9875\u663E\u793A\u5168\u90E8\u8BB0\u5F55.</span>paging.banner.some_items_found=<span class\="pagebanner">{0} {1} \u88AB\u627E\u5230, \u672C\u9875\u663E\u793A\u7B2C {2} \u5230\u7B2C {3} \u6761\u8BB0\u5F55.</span>paging.banner.full=<span class\="pagelinks">[<a href\="{1}">\u9996\u9875</a>/<a href\="{2}">\u4E0A\u4E00\u9875</a>] {0} [<a href\="{3}">\u4E0B\u4E00\u9875</a>/<a href\="{4}">\u5C3E\u9875</a>]</span>paging.banner.first=<span class\="pagelinks">[\u9996\u9875/\u4E0A\u4E00\u9875] {0} [<a href\="{3}">\u4E0B\u4E00\u9875</a>/<a href\="{4}">\u5C3E\u9875</a>]</span>paging.banner.last=<span class\="pagelinks">[<a href\="{1}">\u9996\u9875</a>/<a href\="{2}">\u4E0A\u4E00\u9875</a>] {0} [\u4E0B\u4E00\u9875/\u5C3E\u9875]</span>paging.banner.onepage=<span class="pagelinks">{0}</span>paging.banner.page.selected=<strong>{0}</strong>paging.banner.page.link=<a href\="{1}" title\="\u5230\u7B2C{0}\u9875">{0}</a>paging.banner.page.separator=,# external sort and paginationpagination.sort.param=sortpagination.sortdirection.param=dirpagination.pagenumber.param=pagepagination.searchid.param=searchidpagination.sort.asc.value=ascpagination.sort.desc.value=descpagination.sort.skippagenumber=true# unusedsave.excel.banner=<a href="{0}" rel="external">save ({1} bytes)</a>save.excel.filename=export.xls

 

 

 

struts.xml:

<!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN""http://struts.apache.org/dtds/struts-2.0.dtd"><struts><package name ="StudentInfo" extends ="struts-default">     <action name="productInfo" class="com.action.ProductsAction">            <result name="success">/productInfo.jsp</result>       </action></package ></struts>

 

 

 

 

 

第四步，新建index.jsp和productInfo.jsp

Index.jsp:

  <body>    <a href="productInfo.action">查询所有商品信息</a>  </body>

 

productInfo.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib prefix="display" uri="http://displaytag.sf.net/el" %><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">    <title>My JSP 'index.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">   <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">-->  </head>  <body>    <display:table pagesize="9" export="true" requestURI="productInfo.action" name="list">            <display:column property="num" title="商品编号" group="1" sortable="true"/>            <display:column property="name" title="商品名称" group="2" sortable="true"/>            <display:column property="email" title="反馈地址" autolink="true"/>            <display:column property="money" title="商品价格" group="3" sortable="true"/>            <display:column property="url" title="官方网站" autolink="true"/>            <display:column property="time" title="出场时间" format="{0,time,yyyy-mm-dd}"/>            <display:column/>    </display:table>  </body></html>

 

 

 

 

 

第五步，配置web.xml并部署运行项目

 

web.xml:

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <filter>  <filter-name>s2</filter-name>  <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <!-- 配置displaytag的过滤器 --> <filter>  <filter-name>exportFilter</filter-name>  <filter-class>org.displaytag.filter.ResponseOverrideFilter</filter-class> </filter> <filter-mapping>  <filter-name>s2</filter-name>  <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list>  <welcome-file>index.jsp</welcome-file> </welcome-file-list> <login-config>  <auth-method>BASIC</auth-method> </login-config></web-app>

 

 

 

部署项目到tomcat下，在浏览器键入：

http://localhost:8080/displaytag