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extremecomponents 初使用

Posted on 2007-04-24 15:51 G_G 阅读(1023) 评论(0)  编辑  收藏 所属分类: Reportform 、JspTag
<? xml version="1.0" encoding="UTF-8" ?>

<! DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" >
< web-app >

     < taglib >
         < taglib-uri > http://www.extremecomponents.org </ taglib-uri >
         < taglib-location > /WEB-INF/extremecomponents.tld </ taglib-location >
     </ taglib >
    
 </ web-app >

<% @ taglib prefix = " ec "  uri = " /WEB-INF/extremecomponents.tld "   %>

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

<% @ page language = " java "  import = " java.util.* "  pageEncoding = " UTF-8 " %>
<%
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 'MyJsp.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 ="<c:url value=" /extremecomponents.css" /> ">
    
   </ head >
  
   < body >


             <%
                List goodss  =   new  ArrayList();
                 for  ( int  i  =   1 ; i  <=   10 ; i ++ )
                {
                    Map goods  =   new  java.util.HashMap();
                    goods.put( " code " ,  " A00 " + i);
                    goods.put( " name " ,  " 面包 " + i);
                    goods.put( " status " ,  " A:valid " );
                    goods.put( " born " ,  new   Date ());
                    goodss.add(goods);
                }
                request.setAttribute( " goodss " , goodss);
             %>
            
             < ec:table  
             action ="${pageContext.request.contextPath}/test.jsp"
            items ="goodss"
            cellpadding ="1"
            title ="my bread" >
             < ec:row ></ ec:row >
                 < ec:column  property ="code" />
                 < ec:column  property ="name" />
                 < ec:column  property ="status" />
                 < ec:column  property ="born"  cell ="date"  format ="yyyy-MM-dd" />
             </ ec:table >

   </ body >
</ html >

{转}


关键字:   java,eXtremeComponents    

在我开发的一个通用查询项目中想把查询结果集的显示部分采用eXtremeComponents组件来处理，但是碰到个问题，就是组件预先并不知道查询结果的列名，也就是必须解决Column列的动态显示问题。

有一种方法就是通过在jsp页面里罗列一下，但是总感觉不舒服，查文档发现eXtremeComponents有一接口AutoGenerateColumns可实现此功能，以下为具体实现步骤：

一、在应用的servlet（或struts action等）里（如sqlAction.do）实现根据SQL语句的运行结果获取字段名称列表（fieldnames）和查询结果集（results）并将其放入httpRequest的属性中

代码
  1. List fieldnames = 实现[获取字段名称列表]方法;  
  2. List results = 实现[获取查询结果集]方法;  
  3. httpRequest.setAttribute("fieldnames", fieldnames);  
  4. httpRequest.setAttribute("results", results);  

results将作为eXtremeTable组件中属性items的值，fieldnames将用来迭代构造Column对象

二、编写类AutoGenerateColumnsImpl实现org.extremecomponents.table.core.AutoGenerateColumns接口

代码
  1. package org.boogie.sql.common.ec;  
  2.   
  3. import java.util.Iterator;  
  4. import java.util.List;  
  5.   
  6. import org.extremecomponents.table.bean.Column;  
  7. import org.extremecomponents.table.core.AutoGenerateColumns;  
  8. import org.extremecomponents.table.core.TableModel;  
  9.   
  10. public class AutoGenerateColumnsImpl implements AutoGenerateColumns {  
  11.   
  12.     public void addColumns(TableModel model) {  
  13.         List fieldnames = (List) model.getContext().getRequestAttribute(  
  14.                 "fieldnames");  
  15.         Iterator iterator = fieldnames.iterator();  
  16.         while (iterator.hasNext()) {  
  17.             String fieldname = (String) iterator.next();  
  18.             Column column = model.getColumnInstance();  
  19.             column.setProperty(fieldname);  
  20.             // column.setCell((String) columnToAdd.get(CELL));  
  21.             model.getColumnHandler().addAutoGenerateColumn(column);  
  22.         }  
  23.     }  
  24. }  

AutoGenerateColumns接口只有一个方法addColumns供实现，在此方法中通过传入的TableModel型参数 model可从其Context中获取到httpRequest中的fieldnames属性值，然后根据fieldnames列表迭代构造对应 Column后添加到model中

三、在显示页文件的eXtremeTable中，配置TableTag的属性items值为results，配置ColumnTag的属性autoGenerateColumns值为类AutoGenerateColumnsImpl的全路径

代码
  1. <ec:table   
  2.         items="results"  
  3.         var="result"  
  4.         action="${pageContext.request.contextPath}/sqlAction.do"  
  5.         imagePath="${pageContext.request.contextPath}/images/table/*.gif"  
  6.         title="查询结果"  
  7.         width="100%"  
  8.         rowsDisplayed="5"  
  9.         >  
  10.   <ec:parameter name="method" value="ec"/>  
  11.   <ec:row>  
  12.     <ec:columns autoGenerateColumns="org.boogie.sql.common.ec.AutoGenerateColumnsImpl"/>  
  13.   </ec:row>  
  14. </ec:table>

小结******************************************************************************

<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%> 
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic"%>
<%@ taglib uri="http://www.extremecomponents.org" prefix="ec" %> 

<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>
<%@ taglib uri="http://www.jjm.cn/tags-security" prefix="jjmtag"%>
 

<html> 
    <head>
        <LINK href="<%=request.getContextPath()%>/css/extremetable.css" rel="stylesheet" type="text/css">
        <script language="JavaScript" src="<%=request.getContextPath()%>/res_others/calendar/calendar.js "> </script>     //时间 的 js 插件

        <LINK rel="StyleSheet" type="text/css" href="<%=request.getContextPath()%>/css/jjmStyle.css">      
    </head>

    <body>
    
<CENTER>

    <TABLE border="1" class="borderLessTable" width=100%>
        <html:form action="/tAT.do">
                <TR>
                    <TD class="tdQueryCaption13">
                        <CENTER> 时间范围:</CENTER>
                    </TD>
                    <TD class="tdQueryCaption13">
                    <CENTER>
                        <html:text property="time" size="8" readonly="true"/>                     //作为 时间 的 javascript 插件
                            <img alt="弹出日历下拉菜单" height="16" width="16" align="middle" 
                                    src="<%=request.getContextPath()%>/res_others/calendar/img/cal.gif" 
                                    style="cursor:hand;" 
                                    onclick="fPopUpCalendarDlg(time);return false"/>
                    </CENTER>                            
                    </TD>
                    <tD>
                        <CENTER><html:image src="/rlzy/images/edit/chaxun.gif"></html:image></CENTER>
                    </tD>
                    
            </html:form>
    </TABLE>
    
</CENTER>
    
        <ec:table  
                items ="list"
                imagePath="${pageContext.request.contextPath}/images/ectable/*.gif"
                cellpadding ="1">
             <ec:row></ec:row>
             
                <ec:column   property ="入段&调离" />
             
                <ec:column  cell="com.jjm.extremesite.cell.CorpNameCell" property="段号"/>   //   (1)   标签的重写

                
                <ec:column  cell="com.jjm.extremesite.cell.CorpNameCell" property="车间" />
                 
                <ec:column  property="姓名" />
                 
                 <ec:column   property="入段时间" cell="date" format="yyyy-MM-dd"  />   //时间 的表示 cell="date" format="yyyy-MM-dd"  
                 
                <ec:column   property="调离时间" cell="date" format="yyyy-MM-dd"/>
                 
             </ec:table >

    </body>
</html>

package com.jjm.extremesite.cell;

import org.extremecomponents.table.bean.Column;
import org.extremecomponents.table.cell.AbstractCell;
import org.extremecomponents.table.core.TableModel;

import com.jjm.bj.dao.CorpBean;
import com.jjm.bj.dao.CorpDao;

public class CorpNameCell extends AbstractCell {

    public void destroy() {

    }

    /**
     * @param args
     */
    public static void main(String[] args) {

    }
    
    private String getCorpName(String id){
        if (id!=null && id.length()>0){
            CorpBean obj =null;
            obj=CorpDao.findByID(id);
            if (obj!=null){
                return obj.getCorpName();
            }            
        }    
        return "";
    }

    protected String getCellValue(TableModel tableModel, Column column) {
        CorpNameCell corpName=new CorpNameCell();
        return corpName.getCorpName(column.getValueAsString());
    }

}

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