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JSF: 动态生成的DataTable，固定表头，固定行标

2009-02-17 19:16 429 查看

function StorePage(){d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(keyit=window.open('http://www.365key.com/storeit.aspx?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t),'keyit','scrollbars=no,width=475,height=575,left=75,top=20,status=no,resizable=yes'));keyit.focus();}

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。

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;">


</td>

<td>

<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>

</td>
</tr>

<tr>
<td STYLE="vertical-align: top;">

<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>

</td>

<td STYLE="vertical-align: top;">

<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>

</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;

}

转自：http://blog.csdn.net/wsfeiyuan/archive/2008/11/19/3332694.aspx

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JSF: 动态生成的DataTable， 固定表头， 固定行标

JSF: 动态生成的DataTable，固定表头，固定行标