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JSF教程 – JSF DataTable更新示例
以下代码显示如何更新DataTable。
例子
下面的代码来自UserBean.java。
package cn.w3cschool.common;
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 UserBean implements Serializable{
private static final long serialVersionUID = 1L;
private static final ArrayList<Book> bookList =
new ArrayList<Book>(Arrays.asList(
new Book("1", "CSS", new BigDecimal("722.22"), 1),
new Book("2", "HTML", new BigDecimal("533.33"), 2),
new Book("3", "Java", new BigDecimal("11444.44"), 8),
new Book("4", "Javascript", new BigDecimal("5255.55"), 3),
new Book("5", "SQL",new BigDecimal("166.66"), 10)
));
public ArrayList<Book> getBookList() {
return bookList;
}
public String saveAction() {
//get all existing value but set "editable" to false
for (Book book : bookList){
book.setEditable(false);
}
//return to current page
return null;
}
public String editAction(Book book) {
book.setEditable(true);
return null;
}
public static class Book{
String bookNo;
String productName;
BigDecimal price;
int qty;
boolean editable;
public Book(String bookNo, String productName, BigDecimal price, int qty) {
this.bookNo = bookNo;
this.productName = productName;
this.price = price;
this.qty = qty;
}
public boolean isEditable() {
return editable;
}
public void setEditable(boolean editable) {
this.editable = editable;
}
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;
}
}
}
以下代码来自demo.xhtml。
<?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>
<h1>JSF 2 dataTable example</h1>
<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>
<h:inputText value="#{o.bookNo}" size="10" rendered="#{o.editable}" />
<h:outputText value="#{o.bookNo}" rendered="#{not o.editable}" />
</h:column>
<h:column>
<f:facet name="header">Product Name</f:facet>
<h:inputText value="#{o.productName}" size="20" rendered="#{o.editable}" />
<h:outputText value="#{o.productName}" rendered="#{not o.editable}" />
</h:column>
<h:column>
<f:facet name="header">Price</f:facet>
<h:inputText value="#{o.price}" size="10" rendered="#{o.editable}" />
<h:outputText value="#{o.price}" rendered="#{not o.editable}" />
</h:column>
<h:column>
<f:facet name="header">Quantity</f:facet>
<h:inputText value="#{o.qty}" size="5" rendered="#{o.editable}" />
<h:outputText value="#{o.qty}" rendered="#{not o.editable}" />
</h:column>
<h:column>
<f:facet name="header">Action</f:facet>
<h:commandLink value="Edit" action="#{book.editAction(o)}" rendered="#{not o.editable}" />
</h:column>
</h:dataTable>
<h:commandButton value="Save Changes" action="#{book.saveAction}" />
</h:form>
</h:body>
</html>
以下代码来自table-style.css。
.book-table-header{
bbook-bottom:1px solid #BBB;
padding:16px;
}
.book-table-odd-row{
bbook-top:1px solid #BBB;
}
.book-table-even-row{
bbook-top:1px solid #BBB;
}
下载 DataTable_Update.zip
运行
将生成的WAR文件从目标文件夹复制到Tomcat部署文件夹，并运行Tomcat-Install-folder/bin/startup.bat。
Tomcat完成启动后，在浏览器地址栏中键入以下URL。
http://localhost:8080/simple-webapp/demo.xhtml
