我有这个JSF表.我想添加行号.
<?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="#{order.orderList}" var="o"
styleClass="order-table"
headerClass="order-table-header"
rowClasses="order-table-odd-row,order-table-even-row"
>
<h:column>
<f:facet name="header">No</f:facet>
<h:inputText value="#{order.orderList.rowIndex + 1}" size="10" rendered="false" />
<h:outputText value="#{order.orderList.rowIndex + 1}" rendered="#{not order.orderList.rowIndex + 1}" />
</h:column>
<h:column>
<f:facet name="header">Order No</f:facet>
<h:inputText value="#{o.orderNo}" size="10" rendered="#{o.editable}" />
<h:outputText value="#{o.orderNo}" 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="#{order.editAction(o)}" rendered="#{not o.editable}" />
</h:column>
</h:dataTable>
<h:commandButton value="Save Changes" action="#{order.saveAction}" />
</h:form>
</h:body>
</html>
package com.mkyong;
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="order")
@SessionScoped
public class OrderBean implements Serializable{
private static final long serialVersionUID = 1L;
private static final ArrayList<Order> orderList =
new ArrayList<Order>(Arrays.asList(
new Order("A0001", "Intel CPU",
new BigDecimal("700.00"), 1),
new Order("A0002", "Harddisk 10TB",
new BigDecimal("500.00"), 2),
new Order("A0003", "Dell Laptop",
new BigDecimal("11600.00"), 8),
new Order("A0004", "Samsung LCD",
new BigDecimal("5200.00"), 3),
new Order("A0005", "A4Tech Mouse",
new BigDecimal("100.00"), 10)
));
public ArrayList<Order> getOrderList() {
return orderList;
}
public String saveAction() {
//get all existing value but set "editable" to false
for (Order order : orderList){
order.setEditable(false);
}
//return to current page
return null;
}
public String editAction(Order order) {
order.setEditable(true);
return null;
}
public static class Order{
String orderNo;
String productName;
BigDecimal price;
int qty;
boolean editable;
public Order(String orderNo, String productName, BigDecimal price, int qty) {
this.orderNo = orderNo;
this.productName = productName;
this.price = price;
this.qty = qty;
}
public boolean isEditable() {
return editable;
}
public void setEditable(boolean editable) {
this.editable = editable;
}
public String getOrderNo() {
return orderNo;
}
public void setOrderNo(String orderNo) {
this.orderNo = orderNo;
}
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;
}
}
}
我添加#{order.orderList.rowIndex + 1}了以计算行数并显示数字.但是当我运行JSF页面时,我收到此错误:
java.lang.NumberFormatException: For input string: "rowIndex"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:481)
at java.lang.Integer.parseInt(Integer.java:514)
at javax.el.ListELResolver.toInteger(ListELResolver.java:409)
at javax.el.ListELResolver.getValue(ListELResolver.java:202)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at com.sun.el.parser.AstValue.getValue(AstValue.java:138)
at com.sun.el.parser.AstValue.getValue(AstValue.java:183)
at com.sun.el.parser.AstNot.getValue(AstNot.java:63)
at com.sun.el.parser.AstPlus.getValue(AstPlus.java:59)
at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:224)
at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:413)
at javax.faces.component.UIData.iterate(UIData.java:1993)
at javax.faces.component.UIData.processDecodes(UIData.java:1161)
at javax.faces.component.UIForm.processDecodes(UIForm.java:225)
at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1176)
at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1176)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:933)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:679)
我认为rowIndex没有找到.我怎么解决这个问题？
问候
Bal*_*usC 16
这rowIndex是<h:dataTable>组件本身的属性,而不是其java.util.List价值.
<h:dataTable binding="#{table}" ...>
<h:column>#{table.rowIndex + 1}</h:column>
...
</h:dataTable>
您获得的异常基本上是告诉您正在尝试List通过字符串索引访问项目orderList.get("rowIndex"),这是无效的.访问列表项的唯一有效方法是使用括号表示法#{order.orderList[0]}解析orderList.get(0),但毕竟这不是你需要的.
另一种方法是将orderListin 包装在一个DataModel属性中,并将其作为值提供,例如
<h:dataTable value="#{order.orderModel}" ...>
<h:column>#{order.orderModel.rowIndex + 1}</h:column>
...
</h:dataTable>
同
private transient DataModel orderModel;
public DataModel getOrderModel() {
if (orderModel == null) {
orderModel = new ListDataModel(orderList);
}
return orderModel;
}
它应仅显示输出.将它显示在输入组件中是没有意义的,因为无法将和设置为单个值表达式.在rendered属性中使用它的方式也是如此,因为它不返回布尔值,而是返回long.
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