嗨，我已经为此挣扎了几个小时，我想使用Primefaces请求上下文以JSON格式发送我的POJO到JSF中的Highchart以更新其值。基本上，我遵循@Bhesh Gurung在他自己的stackoverflow问题中的解决方案但我似乎不能让它工作。现在它抛出一个:
找不到标识符为"pieData"的组件，引用自"j_idt31"。
我想通过Primefaces请求上下文成功地使用JSON数据创建一个高图。请帮忙提前谢谢。
下面是我的代码
@ManagedBean
@ViewScoped
public class PieDataProvider {
public void retrievePieData() {
List<String> categories = new ArrayList<String>();
categories.add("Electronic");
categories.add("Food");
categories.add("Liguor");
categories.add("Stationary");
categories.add("Mechanical");
List<Integer> itemCounts = new ArrayList<Integer>();
itemCounts.add(5);
itemCounts.add(20);
itemCounts.add(1);
itemCounts.add(50);
itemCounts.add(10);
RequestContext reqCtx = RequestContext.getCurrentInstance();
reqCtx.addCallbackParam("categories", new Gson().toJson(categories));
reqCtx.addCallbackParam("itemCounts", new Gson().toJson(itemCounts));
System.out.println(categories);
}
}
My xhtml page5.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<ui:composition template="/template/common/commonLayout.xhtml">
<ui:define name="content">
<h:head>
<script type="text/javascript">
src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"
src="http://code.highcharts.com/highcharts.js"
src="http://code.highcharts.com/modules/exporting.js"
</script>
<script type="text/javascript">
function feedPieData(xhr, status, args) {
var categories = eval('(' + args.categories + ')');
var itemCounts = eval('(' + args.itemCounts + ')');
options.xAxis.categories = categories;
var series = {
data : []
};
series.name = new Date().toString();
series.data = itemCounts;
options.series = [ series ];
chart = new Highcharts.Chart(options);
}
</script>
</h:head>
<h:body>
<p:commandLink action="#{pieDataProvider.retrievePieData}"
oncomplete="feedPieData(xhr, status, args);" value="Pie chart demo"
update="pieData" />
</h:body>
</ui:define>
<ui:define name="footer">
<h2>This is page5 Footer</h2>
</ui:define>
</ui:composition>
更新:修改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:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:body>
<ui:composition template="/template/common/commonLayout.xhtml">
<ui:define name="content">
<h:head>
<script type="text/javascript"
src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$('#container')
.highcharts(
{
chart : {
plotBackgroundColor : null,
plotBorderWidth : null,
plotShadow : false
},
title : {
text : 'Most used words, 2010'
},
tooltip : {
pointFormat : '{series.name}: {point.percentage}',
percentageDecimals : 1
},
plotOptions : {
pie : {
allowPointSelect : true,
cursor : 'pointer',
dataLabels : {
enabled : true,
color : '#000000',
connectorColor : '#000000',
formatter : function() {
return '<b>'
+ this.point.name
+ '</b>: '
+ this.percentage
//+ ' %'
;
}
}
}
},
series : [ {
type : 'pie',
name : 'Browser share',
data : [ [ 'Red', 45.0 ],
[ 'Orange', 26.8 ], {
name : 'Yellow',
y : 12.8,
sliced : true,
selected : true
}, [ 'Green', 8.5 ],
[ 'Blue', 6.2 ],
[ 'Violet', 0.7 ] ]
} ]
});
});
</script>
<script type="text/javascript">
function feedPieData(xhr, status, args) {
var categories = JSON.parse(args.categories);
var itemCounts = JSON.parse(args.itemCounts);
var series = {
data : []
};
options.series[0].data.length = 0;
series.data = categories;
series.data = itemCounts;
options.series = [ series ];
chart = new Highcharts.Chart(options);
}
</script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
</h:head>
<h:body>
<div id="container"
style="min-width: 400px; height: 400px; margin: 0 auto"></div>
<h:form>
<p:commandLink action="#{pieDataProvider.retrievePieData}"
oncomplete="feedPieData(xhr, status, args);"
value="Pie chart demo" />
</h:form>
</h:body>
</ui:define>
<ui:define name="footer">
<h2>This is page5 Footer</h2>
</ui:define>
</ui:composition>
</h:body>
</html>
您似乎无法理解Highcharts是一个JavaScript环境，仅在客户端上运行，而PrimeFaces/JSF在服务器端，它们在此上下文中仅作为HTML, CSS和JavaScript代码生成器。
在您的特殊情况下，仅使用将数据从服务器通过RequestContext 发送到客户端。在AJAX调用完成并且客户端有效地接收到序列化的数据之后，您调用一个JavaScript函数，该函数根据接收到的数据在客户端上完全创建一个Highcharts JS组件。
总而言之，它为我们提供了以下设置:
** view元素**
<h:form>
<p:commandLink action="#{pieDataProvider.retrievePieData}"
oncomplete="feedPieData(xhr, status, args);"
value="Generate pie chart" />
</h:form>
** JavaScript **
<script type="text/javascript">
function feedPieData(xhr, status, args) {
var categories = JSON.parse(args.categories);//serialized data from server
var itemCounts = JSON.parse(args.itemCounts);//serialized data from server
//next you create the chart and show it
}
</script>
**动作方法**
public void retrievePieData() {
List<String> categories = generateCategories();
List<Integer> itemCounts = generateItems();
RequestContext reqCtx = RequestContext.getCurrentInstance();
reqCtx.addCallbackParam("categories", new Gson().toJson(categories));//additional serialized data to be sent
reqCtx.addCallbackParam("itemCounts", new Gson().toJson(itemCounts));//additional serialized data to be sent
}