JSF: 动态生成的DataTable， 固定表头， 固定行标， 点击表头可排序（Dynamic DataTable, Fixed Header, Fixed NumColumn, Sortable Header）(更新_关于IE Mobile上的显示)

Dynamic DataTable, Fixed Header, Fixed NumColumn, Sortable Header

自己写了段小代码， 希望可以供大家学习和参考。 代码里没有太多注释， 有时间的话我会补充上去。

自己在写动态生成DataTable的时候也查阅了很多相关文章， 以及实现固定表头等等。

在解决固定表头问题上我是用的两张表（加行标是3张表）实现的， 因为我发现如果用JSF1.1的化实现固定表头几乎不可能（如果有人有好的想法， 比如用JS比较在行的朋友请告诉我解决方法， 谢谢）

实现给每个Header加上一个CommandLink的时候我遇到了很大的问题， 就是无论如何我动态生成的这些CommandLink都没有办法触发事件（并不报错）， 这个问题足足折磨了我3天。。。

最后终于发现问题的所在， 是因为我在生成CommandLink的时候没有给每个CommandLink  SetID。。。 就加上这句话，问题立马解决。

我原来的代码是链接数据库的， 但是这样的化大家也没有办法参考， 所以我对代码少缴修改， 就算是个小例子吧， 可重用。

希望大家对我的代码提出宝贵意见，一起进步，谢谢。

备注（2007/8/9）: 做这个DataTable的目的其实不是在电脑上显示，而是在PDA上使用， 这个是最大的问题， 按照我的测试， 这段代码在FireFox上没有办法正常显示，在IE Mobile 5，6 都没有办法正常显示， 说的直白点， 就是这段代码只能在PC的IE浏览器上显示。。。

PDA上使用JSF显示动态的东西确实没有办法实现， 在进行很久的调研之后发现，凡是一切可以动的效果在IE Mobile 上都没有办法正常显示。。。

不过听说目前的iPhone里面的浏览器很牛， 可以正常显示所有动态的效果（Mac就是牛！！！）

我真心希望如果有人阅读我这个文章后可以给我点意见和建议， 我喜欢可以把自己的这段代码优化的完美些。。。

截图：

Dynamic.jsp

<% @ taglib uri = " http://java.sun.com/jsf/core "  prefix = " f " %>
<% @ taglib uri = " http://java.sun.com/jsf/html "  prefix = " h " %>
< Script  language ="JavaScript" >
   var  tdW;
   // Scroll
   function  f_scroll(Col_T,Row_T,DivNm){
     if (Col_T != ''){
      document.getElementById(Col_T).scrollLeft  =  document.getElementById(DivNm).scrollLeft;
    }
     if (Row_T != ''){
      document.getElementById(Row_T).scrollTop  =  document.getElementById(DivNm).scrollTop;
    }
  }
</ Script >
< html >
     < f:view >
         < head >
             < title > TABLE </ title >
             < link  rel ="stylesheet"  type ="text/css"  href ="styles.css" >
         </ head >
         < body >
             < h:form >
                 < font  size ="2"  color ="black"
                    style ="position:absolute; left: 35; top: 5; width:200; height:20" >
                     < h:outputText  value ="Please Enter:"   />   </ font >

                 < h:inputText  value =""  size ="20"
                    style ="position:absolute; left: 110; top: 5; width:150; height:20"   />

                 < h:commandButton  value ="Search"  action =""
                    style ="position:absolute; left: 270; top: 5; width:50; height:20"   />

                 < table  BORDER =0
                     STYLE ="POSITION: ABSOLUTE; LEFT: 0px; TOP: 30px; right: 0px; bottom: 0px;" >
                     < tr >
                         < td  STYLE ="text-align: right;" >
                             <!-- Table1 start -->
                             <!-- Table1 end -->
                         </ td >

                         < td >
                             <!-- Table2 start -->
                             < Div  ID ="Table2"
                                STYLE ="position: relative; top: 0; border-left: 0.5pt solid black; border-right: 0.5pt solid black; height: 17.75px; width: 285px; overflow-x: hidden;" >
                                 < h:dataTable  value ="#{myBean.myHeader}"  var ="myHeader"
                                    binding ="#{myBean.headerDataTable}"  bgcolor ="white"  border ="1"
                                    cellspacing ="1"  rendered ="true"  styleClass ="orders"
                                    headerClass ="ordersHeader"  rowClasses ="evenColumn,oddColumn"
                                    style ="position:absolute; left: 0; top: 0; width: 100; height: 10; border-collapse:collapse;"
                                    id ="ree" >
                                 </ h:dataTable >
                             </ Div >
                             <!-- Table2 end -->
                         </ td >
                     </ tr >

                     < tr >
                         < td  STYLE ="vertical-align: top;" >
                             <!-- Table3 start -->
                             < Div  ID ="Table3"
                                STYLE ="border-bottom: 0.5pt solid black; border-top: 0.5pt solid black; width: 25.5px; height: 265px; overflow-y: hidden; position: relative; left: 0;" >
                                 < h:dataTable  value ="#{myBean.myNum}"  var ="myNum"
                                    binding ="#{myBean.numDataTable}"  bgcolor ="white"  border ="1"
                                    cellspacing ="1"  rendered ="true"  styleClass ="orders"
                                    headerClass ="ordersHeader"  rowClasses ="evenColumn,oddColumn"
                                    style ="position:absolute; left: 0; top: 0; width: 32; height: 5; border-collapse:collapse;"
                                    id ="dee" >
                                 </ h:dataTable >
                             </ Div >
                             <!-- Table3 end -->
                         </ td >

                         < td  STYLE ="vertical-align: top;" >
                             <!-- Table4 start -->
                             < Div  ID ="Table4"  onScroll ="f_scroll('Table2','Table3','Table4');"
                                STYLE ="height: 281px; width: 300px; overflow-y: scroll; overflow-x: scroll;" >
                                 < h:dataTable  value ="#{myBean.myList}"  var ="myItem"
                                    binding ="#{myBean.dynamicDataTable}"  bgcolor ="white"  border ="1"
                                    cellspacing ="1"  rendered ="true"  styleClass ="orders"
                                    headerClass ="ordersHeader"  rowClasses ="evenColumn,oddColumn"
                                    style ="position:absolute; left: 0; top: 0; width: 100; height: 5; border-collapse:collapse;" >
                                 </ h:dataTable >
                             </ Div >
                             <!-- Table4 end -->
                         </ td >
                     </ tr >
                 </ table >
             </ h:form >
         </ body >
     </ f:view >
</ html >

MyBean.java

package  mypackage;

import  java.util.ArrayList;
import  java.util.List;

import  javax.faces.application.Application;
import  javax.faces.component.UIColumn;
import  javax.faces.component.UIOutput;
import  javax.faces.component.html.HtmlCommandLink;
import  javax.faces.component.html.HtmlDataTable;
import  javax.faces.component.html.HtmlOutputText;
import  javax.faces.context.FacesContext;
import  javax.faces.el.MethodBinding;
import  javax.faces.el.ValueBinding;
import  javax.faces.event.ActionEvent;

public   class  MyBean {
    
     private  List < List < String >>  myList;
    
     private  List < List < String >>  myHeader;
    
     private  List < List < Integer >>  myNum;
    
     private  HtmlDataTable dynamicDataTable;
    
     private  HtmlDataTable headerDataTable;
    
     private  HtmlDataTable numDataTable;
    
     private   static   int  tempWidth  =   30 ;

     //  Load Data from DataBase to Every DataTable --------------------------------
     public   void  loadMyList()  throws  Exception {

        myList  =   new  ArrayList < List < String >> ();
        
         int  row  =   25 ;
        
         while (row  >   0 ) {  
            
             int  column  =   25 ;
            
            String str  =   " o " ;
            
            List  < String >  tmpvector  =   new  ArrayList  < String >  ();
            
             while (column  >   0 ) {
                
                tmpvector.add(str);
                
                column -- ;
            }
            row -- ;
            
            myList.add(tmpvector);
        }
    }
    
     public   void  loadMyHeader()  throws  Exception {

        myHeader  =   new  ArrayList < List < String >> ();

        String str  =   " ***** " ;
        
         int  column  =   25 ;
        
        List  < String >  tmpvector  =   new  ArrayList  < String >  ();
        
         while (column  >   0 ) {

            tmpvector.add(str);
            
            column -- ;
        }
        myHeader.add(tmpvector);
    }
    
     public   void  loadMyNum()  throws  Exception {

        myNum  =   new  ArrayList < List < Integer >> ();
        
         int  row  =   0 ;
        
         while (row  <   25 ) {  
                
            List  < Integer >  tmpvector  =   new  ArrayList  < Integer >  ();

            tmpvector.add(row);
            
            myNum.add(tmpvector);
            
            row ++ ;
        }
    }
    
     // initialize Every DataTable to the Front-------------------------------------
     public   void  populateDynamicDataTable() {

         if  (myList  !=   null   &&  myList.size()  >   0 ) {
            
            dynamicDataTable  =   new  HtmlDataTable();
            
             int  columns  =  ((List) myList.get( 0 )).size();

            System.out.println( " DisplayCloumn:    "   +  columns); //
            
             for  ( int  i  =   0 ; i  <  columns; i ++ ) {             

                ValueBinding myItem  =  FacesContext.getCurrentInstance().getApplication().createValueBinding( " #{myItem[ "   +  i  +   " ]} " );              
                
                UIColumn column  =   new  UIColumn();
                
                HtmlOutputText outputText  =   new  HtmlOutputText();
                
                outputText.setValueBinding( " value " , myItem);

                outputText.setStyle( " width:  "   +  tempWidth  +   "" );
                
                column.getChildren().add(outputText);
                
                column.setId( " col_ "   +  i);   // You should set ID of every component which you create in the Backing-Bean .
                
                dynamicDataTable.getChildren().add(column);
            }
        }
    }
    
     public   void  populateHeaderDataTable() {
        
         if  (myHeader  !=   null   &&  myHeader.size()  >   0 ) {
            
            headerDataTable  =   new  HtmlDataTable();
            
             int  columns  =  ((List) myHeader.get( 0 )).size();    
            
            FacesContext facesContext  =  FacesContext.getCurrentInstance();
            
            Application application  =  facesContext.getApplication();
            
             for  ( int  i  =   0 ; i  <  columns; i ++ ) {
            
                HtmlCommandLink commandLink  =  (HtmlCommandLink) application.createComponent(HtmlCommandLink.COMPONENT_TYPE);
                
                String valueBindingExpression  =   " #{myHeader[ "   +  i  +   " ]} " ;                    
                ValueBinding valueBinding  =  application.createValueBinding(valueBindingExpression);                 
                commandLink.setValueBinding( " value " , valueBinding);        
                
                commandLink.setId( " head_comankLink_ "   +  i);  // The most important!!! If you dont put it nothing is gonna happen.
                
                commandLink.setStyle( " color: blue " );
                
                commandLink.setStyle( " width:  "   +  tempWidth  +   "" );        
                
                commandLink.getAttributes();

                Class[] params  =  { ActionEvent. class  };                
                MethodBinding actionListener  =  application.createMethodBinding( " #{myBean.setSelectedDocumentId} " , params);                
                commandLink.setActionListener(actionListener);

                commandLink.setImmediate( true ); 

                UIColumn column  =   new  UIColumn();                
                column.getChildren().add(commandLink);
                column.setId( " head_ "   +  i);

                headerDataTable.getChildren().add(column);       
            }
        }
    }
    
     public   void  populateNumDataTable() {
        
         if  (myNum  !=   null   &&  myNum.size()  >   0 ) {
            
            numDataTable  =   new  HtmlDataTable();

            UIOutput output  =   new  UIOutput();
            
            ValueBinding myItem  =  FacesContext.getCurrentInstance().getApplication().createValueBinding( " #{myNum[0]} " );
            
            output.setValueBinding( " value " , myItem);
            
             //  Set column.
            UIColumn column  =   new  UIColumn();
            column.getChildren().add(output);
            column.setId( " num " );
            
            numDataTable.getChildren().add(column);
        }
    }
   
     // Test Actions and ActionListeners--------------------------------------------

     public   void  setSelectedDocumentId(ActionEvent event)  throws  Exception 
    {

    }

     //  Getters -------------------------------------------------------------------
     public  HtmlDataTable getDynamicDataTable()  throws  Exception {
         if  (dynamicDataTable  ==   null ) {
            
            loadMyList();  //  Reload to get most recent data.
            
            populateDynamicDataTable();
        }
         return  dynamicDataTable;
    }
    
     public  HtmlDataTable getHeaderDataTable()  throws  Exception {
         if  (headerDataTable  ==   null ) {
            
            loadMyHeader();  //  Reload to get most recent data.
            
            populateHeaderDataTable();
        }
         return  headerDataTable;
    }

     public  HtmlDataTable getNumDataTable()  throws  Exception {
         if  (numDataTable  ==   null ) {
            
            loadMyNum();  //  Reload to get most recent data.
            
            populateNumDataTable();
        }
         return  numDataTable;
    }
    
     public  List < List < Integer >>  getMyNum() {
         return  myNum;
    }
    
     public  List < List < String >>  getMyHeader() {
         return  myHeader;
    }
    
     public  List < List < String >>  getMyList() {
         return  myList;
    }

     //  Setters -------------------------------------------------------------------
     public   void  setDynamicDataTable(HtmlDataTable dynamicDataTable) {
         this .dynamicDataTable  =  dynamicDataTable;
    }

     public   void  setHeaderDataTable(HtmlDataTable headerDataTable) {
         this .headerDataTable  =  headerDataTable;
    }

     public   void  setMyHeader(List < List < String >>  myHeader) {
         this .myHeader  =  myHeader;
    }
    
     public   void  setNumDataTable(HtmlDataTable numDataTable) {
         this .numDataTable  =  numDataTable;
    }
    
     public   void  setMyNum(List < List < Integer >>  myNum) {
         this .myNum  =  myNum;
    }

     public   void  setMyList(List < List < String >>  myList) {
         this .myList  =  myList;
    }
}

faces-config.xml

<? xml version="1.0" encoding="UTF-8" ?>
<! DOCTYPE faces-config PUBLIC "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN" "http://java.sun.com/dtd/web-facesconfig_1_1.dtd" >

< faces-config >
     < managed-bean >
         < managed-bean-name > myBean </ managed-bean-name >
         < managed-bean-class > mypackage.MyBean </ managed-bean-class >
         < managed-bean-scope > session </ managed-bean-scope >
     </ managed-bean >
</ faces-config >

styles.css

.orders  {
    border :  thin solid black ;
}

.ordersHeader  {
    text-align :  center ;
    font-style :   ;
    color :  Snow ;
    font-size :  12px ;
    background :  Teal ;
}

.evenColumn  {
    text-align :  center ;
    font-size :  12px ;
    background :  #F0FFFF ;
}

.oddColumn  {
    text-align :  center ;
    font-size :  12px ;
    background :  white ;

}

第一次发贴， 我没有加入行标， 不知道大家可不可以直接复制，如果不可以的话可以留言给我， 我会把代码方到文件里面。