JSF資料表(h:dataTable)新增刪除
JSF中有一個叫作DataTable的控制元件，可用來渲染和格式化html表格。使用DataTable，我們可以疊代收集或陣列陣列來顯示資料。DataTable具有以簡單的方式修改其資料的屬性。
要使用DataTable，我們需要新增以下HTML頭。
<html
xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html">
</html>
以下JSF標籤 -
<h:dataTable value="#{userData.employees}" var="employee"
styleClass="employeeTable"
headerClass="employeeTableHeader"
rowClasses="employeeTableOddRow,employeeTableEvenRow">
<h:column>
<f:facet name="header">Name</f:facet>
#{employee.name}
</h:column>
<h:column>
<f:facet name="header">Department</f:facet>
#{employee.department}
</h:column>
<h:column>
<f:facet name="header">Age</f:facet>
#{employee.age}
</h:column>
<h:column>
<f:facet name="header">Salary</f:facet>
#{employee.salary}
</h:column>
</h:dataTable>
被渲染成以下HTML標籤。
<table class="employeeTable">
<thead><tr>
<th class="employeeTableHeader" scope="col">Name</th>
<th class="employeeTableHeader" scope="col">Department</th>
<th class="employeeTableHeader" scope="col">Age</th>
<th class="employeeTableHeader" scope="col">Salary</th>
</tr></thead>
<tbody>
<tr class="employeeTableOddRow">
<td>Tom</td>
<td>Marketing</td>
<td>10</td>
<td>2000.0</td>
</tr>
<tr class="employeeTableEvenRow">
<td>Robert</td>
<td>Marketing</td>
<td>15</td>
<td>1000.0</td>
</tr>
</table>
JSF資料表新增刪除範例
開啟 NetBeans IDE 建立一個Web工程：DataTableAddDelete，其目錄結構如下所示 -
建立以下檔案程式碼，檔案：index.xhtml 的程式碼內容如下所示 -
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets">
<h:head>
<h:outputStylesheet library="css" name="table-style.css" />
</h:head>
<h:body>
<h:form>
<h:dataTable value="#{book.bookList}" var="o"
styleClass="book-table"
headerClass="book-table-header"
rowClasses="book-table-odd-row,book-table-even-row">
<h:column>
<f:facet name="header">Book No</f:facet>#{o.bookNo}
</h:column>
<h:column>
<f:facet name="header">Product Name</f:facet>#{o.productName}
</h:column>
<h:column>
<f:facet name="header">Price</f:facet>#{o.price}
</h:column>
<h:column>
<f:facet name="header">Quantity</f:facet>#{o.qty}
</h:column>
<h:column>
<f:facet name="header">Action</f:facet>
<h:commandLink value="Delete" action="#{book.deleteAction(o)}" />
</h:column>
</h:dataTable>
<h3>Enter Book</h3>
<table>
<tr>
<td>Book No :</td>
<td><h:inputText size="20" value="#{book.bookNo}" /></td>
</tr>
<tr>
<td>Product Name :</td>
<td><h:inputText size="20" value="#{book.productName}" /></td>
</tr>
<tr>
<td>Quantity :</td>
<td><h:inputText size="20" value="#{book.price}" /></td>
</tr>
<tr>
<td>Price :</td>
<td><h:inputText size="20" value="#{book.qty}" /></td>
</tr>
</table>
<h:commandButton value="Add" action="#{book.addAction}" />
</h:form>
</h:body>
</html>
檔案：User.java 的程式碼內容如下所示 -
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package com.yiibai;
/**
*
* @author Maxsu
*/
import java.io.Serializable;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Arrays;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
@ManagedBean(name = "book")
@SessionScoped
public class User implements Serializable {
private static final long serialVersionUID = 1L;
String bookNo;
String productName;
BigDecimal price;
int qty;
public String getBookNo() {
return bookNo;
}
public void setBookNo(String bookNo) {
this.bookNo = bookNo;
}
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public BigDecimal getPrice() {
return price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
public int getQty() {
return qty;
}
public void setQty(int qty) {
this.qty = qty;
}
private static final ArrayList<Book> bookList
= new ArrayList<Book>(Arrays.asList(
new Book("1", "CSS", new BigDecimal("123.12"), 1),
new Book("2", "HTML", new BigDecimal("321.12"), 2),
new Book("3", "SQL", new BigDecimal("12333.33"), 8),
new Book("4", "Javascript", new BigDecimal("1233.33"), 3),
new Book("5", "Web", new BigDecimal("123.22"), 10)
));
public ArrayList<Book> getBookList() {
return bookList;
}
public String addAction() {
Book book = new Book(this.bookNo, this.productName,
this.price, this.qty);
bookList.add(book);
return null;
}
public String deleteAction(Book book) {
bookList.remove(book);
return null;
}
public static class Book {
String bookNo;
String productName;
BigDecimal price;
int qty;
public Book(String bookNo, String productName,
BigDecimal price, int qty) {
this.bookNo = bookNo;
this.productName = productName;
this.price = price;
this.qty = qty;
}
public String getBookNo() {
return bookNo;
}
public void setBookNo(String bookNo) {
this.bookNo = bookNo;
}
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public BigDecimal getPrice() {
return price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
public int getQty() {
return qty;
}
public void setQty(int qty) {
this.qty = qty;
}
}
}
右鍵執行工程：DataTableAddDelete，如果沒有任何錯誤，開啟瀏覽器存取：
http://localhost:8084/DataTableAddDelete/
應該會看到以下結果 -
簡單寫入一些資訊，然後提交 -
