最近的曲线需要用油画ZoomLine官方网站看了好几天，今天整理出来供大家参考使用
zoomline.html资源
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>FusionCharts Free Documentation</title>
<!-- 脚本区域 start -->
<script type="text/javascript" src="js/FusionCharts.js"></script>
<script type="text/javascript" src="js/FusionChartsExportComponent.js"></script>
<!-- 脚本区域 end -->
<script type="text/javascript">
//导出图片调用的方法
function startExport(){
var chart = getChartFromId("myFusionExport"); //生成的FusionCharts图表本身的标识
if (chart.hasRendered()){
chart.exportChart();
}else{
alert("Please wait for the chart to finish rendering, before you can invoke exporting");
}
}
</script>
</head>
<table width="98%" border="0" cellspacing="0" cellpadding="3" align="center">
<tr>
<td valign="top" class="text" align="center">
<div id="myFusion" align="center">
FusionCharts.
</div>
<script type="text/javascript">
var chart = new FusionCharts("charts/ZoomLine.swf", "myFusionExport", "790", "450");
chart.setDataURL("data/zoomLine.xml");
chart.render("myFusion");
</script>
</td>
</tr>
<input type='button' value='导出FusionCharts图片' onClick="startExport();" />
</table>
</html>
zoomLine.xml源码
<chart
palette="1"
showLabels="0"
showBorder="1"
chartLeftMargin="10"
chartRightMargin="5"
chartTopMargin="15"
chartBottomMargin="15"
exportEnabled="1"
exportAtClient="0"
exportHandler="FCExporter"
showExportDialog="1"
animation="0"
exportFileName="fusioncharts"
exportDialogMessage="正在导出，请稍候..."
rotateLabels="0"
DIVLINES="Blur"
DATATOOLTIP="0x004E98"
showValues="0"
allowPinMode="1"
showVDivLines="1"
drawToolbarButtons="1"
lineThickness="1"
oolBarBtnHPadding="0"
mouseCursorColor="#FF0000"
toolTipBarColor="FF0000"
pinPaneBgColor="#FFFFFF"
lineColor="#0000FF"
divLineColor="#FF0000"
background="#0000FF"
bgColor="#FFFFFF"
scrollColor="#FFFFFF"
canvasBorderColor="#FF0000"
toolbarButtonColor="FFFFFF"
btnZoomOutTitle=" "
zoomOutMenuItemLabel=" "
btnResetChartTitle="缩小"
btnSwitchtoZoomModeTitle="切换Pin模式"
btnSwitchToPinModeTitle="切换Zoom模式"
showToolBarButtonTooltext="0"
toolbarButtonFontColor="000000"
>
<categories>
<category name="02-03 07:00:05" />
<category name="02-03 06:59:35" />
<category name="02-03 06:59:05" />
<category name="02-03 06:58:35" />
<category name="02-03 06:58:04" />
<category name="02-03 06:57:34" />
<category name="02-03 06:57:04" />
<category name="02-03 06:56:34" />
<category name="02-03 06:56:04" />
<category name="02-03 06:55:33" />
</categories>
<dataset>
<set value="300" />
<set value="349" />
<set value="627" />
<set value="445" />
<set value="623" />
<set value="575" />
<set value="567" />
<set value="576" />
<set value="745" />
<set value="409" />
</dataset>
</chart>以上基本实现了图表的显示工作。假设须要导出还须要下面代码
FCExporterFormat.java源码
package com.fusioncharts.exporter.resources;
import javax.servlet.http.HttpServletResponse;
import com.fusioncharts.exporter.beans.ExportBean;
public abstract class FCExporterFormat {
abstract public Object exportProcessor(ExportBean exportBean);
abstract public String exportOutput(Object exportObj,
HttpServletResponse response);
}
FCExporterIMG.java源码
package com.fusioncharts.exporter.resources;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletResponse;
import com.fusioncharts.exporter.ErrorHandler;
import com.fusioncharts.exporter.FusionChartsExportHelper;
import com.fusioncharts.exporter.beans.ChartMetadata;
import com.fusioncharts.exporter.beans.ExportBean;
import com.fusioncharts.exporter.encoders.BasicEncoder;
import com.fusioncharts.exporter.encoders.JPEGEncoder;
import com.fusioncharts.exporter.generators.ImageGenerator;
public class FCExporterIMG extends FCExporterFormat {
private ExportBean exportBean = null;
public String exportOutput(Object exportObj, HttpServletResponse response) {
String action = (String)exportBean.getExportParameterValue("exportaction");
String exportFormat = (String)exportBean.getExportParameterValue("exportformat");
String exportTargetWindow = (String)exportBean.getExportParameterValue("exporttargetwindow");
String fileNameWithoutExt = (String)exportBean.getExportParameterValue("exportfilename");
String extension = FusionChartsExportHelper.getExtensionFor(exportFormat.toLowerCase());;
String fileName = fileNameWithoutExt+"."+ extension;
StringBuffer err_warn_Codes = new StringBuffer();
BufferedImage chartImage = (BufferedImage)exportObj;
boolean isHTML = false;
if(action.equals("download"))
isHTML=true;
String noticeMessage = "";
String meta_values= exportBean.getMetadataAsQueryString(null,false,isHTML);
if(action.equals("download")){
try {
response.setContentType(FusionChartsExportHelper.getMimeTypeFor(exportFormat.toLowerCase()));
OutputStream os = response.getOutputStream();
if(exportTargetWindow.equalsIgnoreCase("_self")){
response.addHeader("Content-Disposition", "attachment; filename=""+fileName+""");
//response.addHeader("Content-length",""+ios.length());
} else {
response.addHeader("Content-Disposition", "inline; filename=""+fileName+""");
}
if( exportFormat.toLowerCase().equalsIgnoreCase("jpg") || exportFormat.toLowerCase().equalsIgnoreCase("jpeg")){
JPEGEncoder jpegEncoder = new JPEGEncoder();
try {
jpegEncoder.encode(chartImage,os);
os.flush();
}catch(Throwable e){
//Unable to encode the buffered image
System.out.println("Unable to (JPEG) encode the buffered image");
err_warn_Codes.append("E516,");
//os.flush();
// Note forward will not work in this case, as the output stream has already been opened
// Hence we have to output the error directly.
meta_values =exportBean.getMetadataAsQueryString(null,true,isHTML);
// Reset the response to set new content type and use out instead of outputstream
response.reset();
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.print(meta_values+noticeMessage+ErrorHandler.buildResponse(err_warn_Codes.toString(),isHTML));
return null;
}
chartImage=null;
} else {
BasicEncoder basicEncoder = new BasicEncoder();
try {
basicEncoder.encode(chartImage,os,1F,exportFormat.toLowerCase());
os.flush();
}catch(Throwable e){
System.out.println("Unable to encode the buffered image");
err_warn_Codes.append("E516,");
//os.flush();
// Note forward will not work in this case, as the output stream has already been opened
// Hence we have to output the error directly.
meta_values =exportBean.getMetadataAsQueryString(null,true,isHTML);
// Reset the response to set new content type and use out instead of outputstream
response.reset();
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.print(meta_values+noticeMessage+ErrorHandler.buildResponse(err_warn_Codes.toString(),isHTML));
return null;
}
chartImage=null;
}
} catch (IOException e) {
e.printStackTrace();
}
}
if(err_warn_Codes.indexOf("E") != -1) {
meta_values =exportBean.getMetadataAsQueryString(null,true,isHTML);
PrintWriter out;
try {
out = response.getWriter();
out.print(meta_values+noticeMessage+"&statusCode=1&statusMessage=successful");
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
public Object exportProcessor(ExportBean pExportBean) {
exportBean = pExportBean;
String stream = (String)exportBean.getStream();
ChartMetadata metadata= exportBean.getMetadata();
BufferedImage chartImage = ImageGenerator.getChartImage(stream,metadata);
return chartImage;
}
}
FCExporter.java源码
package com.fusioncharts.exporter.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.fusioncharts.exporter.ErrorHandler;
import com.fusioncharts.exporter.FusionChartsExportHelper;
import com.fusioncharts.exporter.beans.ExportBean;
import com.fusioncharts.exporter.resources.FCExporterFormat;
public class FCExporter extends HttpServlet {
public FCExporter() {
super();
}
public void init(ServletConfig config) throws ServletException {
super.init(config);
}
public void destroy() {
super.destroy();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request,response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
ServletContext sc = getServletContext();
String WEB_ROOT_PATH = sc.getRealPath("/");
ExportBean localExportBean = FusionChartsExportHelper.parseExportRequestStream(request);
String exportFormat = (String)localExportBean.getExportParameterValue("exportformat");
String exportTargetWindow = (String)localExportBean.getExportParameterValue("exporttargetwindow");
StringBuffer err_warn_Codes = new StringBuffer();
if (localExportBean.getMetadata().getWidth() == -1 ||
localExportBean.getMetadata().getHeight() == -1 ||
localExportBean.getMetadata().getWidth() == 0 ||
localExportBean.getMetadata().getHeight() == 0 ) {
//If Width/Height parameter is not sent, the ChartMetadata will have width/height as -1
//Raise Error E101 - Width/Height not found
err_warn_Codes.append("E101,");
}
if (localExportBean.getMetadata().getBgColor() == null) {
//Background color not available
err_warn_Codes.append("W513,");
}
if (localExportBean.getStream() == null ) {
//If image data not available
//Raise Error E100
err_warn_Codes.append("E100,");
}
String exportAction = (String)localExportBean.getExportParameterValue("exportaction");
boolean isHTML = false;
if(exportAction.equals("download"))
isHTML=true;
if(!exportAction.equals("download")) {
String fileNameWithoutExt = (String)localExportBean.getExportParameterValue("exportfilename");
String extension = FusionChartsExportHelper.getExtensionFor(exportFormat.toLowerCase());;
String fileName = fileNameWithoutExt+"."+ extension;
err_warn_Codes.append(ErrorHandler.checkServerSaveStatus(WEB_ROOT_PATH,fileName));
}
String pathToWebAppRoot = getServletContext().getRealPath("/");
localExportBean.addExportParameter("webapproot", pathToWebAppRoot);
String meta_values= localExportBean.getMetadataAsQueryString(null,true,isHTML);
if(err_warn_Codes.indexOf("E") != -1) {
// There are errors - forward to error page
writeError(response,""+isHTML,err_warn_Codes.toString(),meta_values,exportTargetWindow);
} else {
// get the exporter for this format
//String path = FusionChartsExportHelper.getExporterFilePath(exportFormat).replace(" ","");
// gives with .jsp extension, let us remove the extension - this is a work-around until next release, where Servlets will also be supported
//int indexOfDot = path.lastIndexOf(".");
//String exporterClassName = path.substring(0, indexOfDot);
try {
//Class exporterClass = Class.forName(exporterClassName);
Class exporterClass = Class.forName("com.fusioncharts.exporter.resources.FCExporterIMG");
FCExporterFormat fcExporter = (FCExporterFormat)exporterClass.newInstance();
Object exportObject = fcExporter.exportProcessor(localExportBean);
String status= fcExporter.exportOutput(exportObject, response);
} catch (ClassNotFoundException e) {
err_warn_Codes.append("E404");
writeError(response,""+isHTML,err_warn_Codes.toString(),meta_values,exportTargetWindow);
} catch (InstantiationException e) {
err_warn_Codes.append("E404");
writeError(response,""+isHTML,err_warn_Codes.toString(),meta_values,exportTargetWindow);
} catch (IllegalAccessException e) {
err_warn_Codes.append("E404");
writeError(response,""+isHTML,err_warn_Codes.toString(),meta_values,exportTargetWindow);
}
}
}
private void writeError(HttpServletResponse response, String isHTML, String errorCodes, String otherMessages, String exportTargetWindow) {
if(isHTML==null){
isHTML = "true";
}
if(otherMessages==null){
otherMessages="";
}
if(errorCodes==null){
errorCodes="";
}
response.setContentType("text/html");
if(exportTargetWindow.equalsIgnoreCase("_self")){
response.addHeader("Content-Disposition", "attachment;");
} else {
response.addHeader("Content-Disposition", "inline;");
}
PrintWriter out;
try {
out = response.getWriter();
out.print(ErrorHandler.buildResponse(errorCodes,new Boolean(isHTML).booleanValue())) ;
out.print(otherMessages);
} catch (IOException e) {
}
}
}web.xml配置
<?xml version="1.0" encoding="UTF-8"?
> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <servlet> <display-name>FCExporter</display-name> <servlet-name>FCExporter</servlet-name> <servlet-class>com.fusioncharts.exporter.servlet.FCExporter</servlet-class> </servlet> <servlet-mapping> <servlet-name>FCExporter</servlet-name> <url-pattern>/FCExporter</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>zoomline.html</welcome-file> </welcome-file-list> </web-app>