FusionCharts 实现swf图片下载功能

来源：互联网发布：js history.back 1 编辑：程序博客网时间：2024/06/04 19:11

最近在学FusionCharts图表，效果很炫啊，昨天是根据教程做图片下载功能，书上写的很笼统，自己写的时候总有一些问题，特此整理笔记，详细一些，呵呵~~~

1.首先要有对应的swf文件，如果是简单的柱状图，则需要Column3D.swf或Column2D.swf，如果是复合图，则需要MSColumn3D.swf等。

2.还要有FusionCharts.js和FusionChartsExportComponent.js两个文件

3.需要两个jar包，分别是fcexporter.jar和fcexporthandler.jar

4.还有对应的jsp，分别是FCExporter.jsp、FCExporterError.jsp、FCExporter_IMG.jsp、FCExporter_PDF.jsp

5.还有一个fusioncharts_export.properties文件，放在src根目录下

6.还有最重要的FusionCharts.jsp啦~~

准备工作好了以后，就要开始写代码了啊

1.jsp里的代码为

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ include file="Includes/FusionChartsRenderer.jsp"%> <html><head><script language="JavaScript" src="jsclass/FusionCharts.js"></script><script language="JavaScript" src="jsclass/FusionChartsExportComponent.js"></script><script type="text/javascript"> function ExportedPic(objRtn){     if (objRtn.statusCode == "1"){     alert("The chart was successfully saved on server. The file can be accessed from " + objRtn.fileName);     }else{     alert("The chart could not be saved on server. There was an error. Description : " + objRtn.statusMessage);     }     } </script></head><body bgcolor="#ffffff"><div id="chartdiv" align="center">The chart will appear within this DIV. This text will be replaced by the chart.</div><script type="text/javascript">     var myChart = new FusionCharts("swf/MSColumnLine3D.swf", "myChartId", "1000", "600", "0", "1");  myChart.setDataURL("data3.xml"); myChart.render("chartdiv"); </script></body></html>

data3.xml的内容为

<chart palette="1" caption="绩效比对" aAxisName="城市" yAxisName="月份" showValue="0"unescapeLinks='0' exportHandler='export/FCExporter.jsp' exportFileName='myPicture' exportCallback='ExportedPic' exportEnabled='1' exportAtClient='0' exportAction='download' ><categories><category label="常州"/><category label="无锡"/><category label="南通"/><category label="苏州"/><category label="盐城"/></categories><dataset seriesName="一月"><set value="152"/><set value="263"/><set value="548"/><set value="424"/><set value="452"/></dataset><dataset seriesName="二月" renderAs="Line"><set value="544"/><set value="689"/><set value="768"/><set value="222"/><set value="458"/></dataset><dataset seriesName="三月"><set value="359"/><set value="485"/><set value="958"/><set value="458"/><set value="432"/></dataset><dataset seriesName="四月"><set value="485"/><set value="321"/><set value="582"/><set value="951"/><set value="123"/></dataset><trendlines><line startValue="26000" color="91C728" displayValue="Target" showOnTop="1"/></trendlines></chart>

注：exportHandler：这是真正导出图片的文件，他会生成图片导出，根据项目编码不同，我是用jsp对应的FCExporter.jsp

exportFileName：这是导出图片的默认名字。

exportAction：导出操作。这个有两个取值，一个是download，表示下载到客户端，另一个是save，表示会存储到服务器对应目录下，需要在properties里设置

exportAtClient 表示是否是进行客户端导出。因为我不提倡客户端导出，所以设置为0

exportEnabled 是否可以导出图片如果为0，则不能导出图片或pdf

exportCallback：回调函数。如果exportAction是download，则函数不起作用。

fusioncharts_export.properties的内容为

#This constant defines the name of the export handler jsp file - DO NOT MODIFY THIS!!!EXPORTHANDLER=FCExporter_#Path where the export handler files are located#Please note that the resource path should be relative to #FCExporter.jsp file's directory#By default the path is "Resources/"RESOURCEPATH=/FusionCharts/export/Resources/#Please specify the path to a folder with write permissions relative to web application root#The exported image/PDF files would be saved here.SAVEPATH=/FusionCharts/images/#This constant HTTP_URI stores the HTTP reference to #the folder where exported charts will be saved. #Please enter the HTTP representation of that folder #in this constant e.g., http://www.yourdomain.com/images/HTTP_URI=http://www.yourdomain.com/savefiles/ #OVERWRITEFILE sets whether the export handler would overwrite an existing file #the newly created exported file. If it is set to false the export handler would#not overwrite. In this case if INTELLIGENTFILENAMING is set to true the handler#would add a suffix to the new file name. The suffix is a randomly generated UUID.#Additionally, you can add a timestamp or random number as additional prefix.OVERWRITEFILE=falseINTELLIGENTFILENAMING=trueFILESUFFIXFORMAT=TIMESTAMP

注：1.RESOURCEPATH 为FCExporter_IMG.jsp、FCExporter_PDF.jsp这两个文件的路径

2.SAVEPATH 配置的是导出图片保存路径(需要在工程里事先建好)

3.HTTP_URI 配置的是保存图片的服务器的绝对路径

这样的话，就可以了，访问项目地址：

下面是我项目的结构：