准备以下开源项目：
1. Struts 2.1.6
2. Open Flash Chart 2 Version 2 Lug Wyrm Charmer (28th, July 2009)
3. jofc2，这东西不知道是没做好还是什么意思，好像和ofc2不怎么匹配，最好下源码，有什么问题直接改。
4. log4j
用eclipse新建动态网站，取名OFC2Demo，将Struts2 lib目录下commons-fileupload-1.2.1.jar、commons-logging-1.0.4.jar、freemarker-2.3.13.jar、ognl-2.6.11.jar、struts2-core-2.1.6.jar、xstream-1.3.1.jar和xwork-2.1.2.jar、log4j.jar复制到WebContent\lib目录下。
使用svn下载jofc2源码，http
://jofc2.googlecode.com/svn/trunk/，将下载后的src目录下的jofc2整个目录和下级内容全部复制到项目src目录下。
在web.xml中加入struts2拦截器
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>OFC2Demo</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.FilterDispatcher
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>
在返回jofc2生成Open Flash Chart数据时，本来想用jsonplugin插件，但发现序列化jofc2的Chart对象时，许多元素名称和Chart.toString()不同，这使得Open Flash Chart解析数据时不认识。所以需增加一个Struts2自定义Result Type，步骤如下：
新建类，OFC2Plugin
package com.xy.strutsplugin;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletResponse;
import jofc2.model.Chart;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts2.StrutsStatics;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.Result;
import com.opensymphony.xwork2.util.ValueStack;
public class OFC2Result implements Result {
private static final long serialVersionUID = 6881760833309063964L;
private static final Log log = LogFactory.getLog(OFC2Result.class);
public void execute(ActionInvocation invocation) throws Exception {
ActionContext actionContext = invocation.getInvocationContext();
HttpServletResponse response = (HttpServletResponse) actionContext
.get(StrutsStatics.HTTP_RESPONSE);
try {
ValueStack stack = invocation.getStack();
Chart chart = (Chart)stack.findValue("ofcChart");
response.setContentType("application/json-rpc;charset=utf-8");
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Expires", "0");
response.setHeader("Pragma", "No-cache");
PrintWriter out = response.getWriter();
log.debug(chart.toString());
out.print(chart.toString());
} catch (IOException exception) {
log.error(exception.getMessage(), exception);
throw exception;
}
}
}
在src下新建struts-plugin.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="ofc2-default" extends="struts-default">
<result-types>
<result-type name="ofc2" class="com.xy.strutsplugin.OFC2Result"/>
</result-types>
</package>
</struts>
配置log4j，以查看json输出信息。
在src下增加两个文件
commons-logging.properties
## set Log as Log4j
org.apache.commons.logging.Log=org.apache.commons.logging.impl.Log4JLogger
log4j.properties
# This is the configuring for logging displayed in the Application Server
log4j.rootCategory=DEBUG,stdout
#stdout configure
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern= %d %p [%c] - <%m>%n
##
log4j.logger.com.xy.strutsplugin.OFC2Result=DEBUG
好了，现在将ofc所需的包添加到项目中
在WebContent目录下添加文件夹ofc2，将open-flash-chart-2-Lug-Wyrm-Charmer目录下的open-flash-chart.swf和js目录复制到新建的ofc2目录下。
演示Line Chart
在Action层增加类LineAction
package com.xy.action;
import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import jofc2.model.Chart;
import jofc2.model.elements.LineChart;
import jofc2.model.axis.YAxis;
import jofc2.model.Text;
import com.opensymphony.xwork2.ActionSupport;
public class LineAction extends ActionSupport{
private static final long serialVersionUID = -5759373192727732648L;
private Chart ofcChart;
public Chart getOfcChart() {
return ofcChart;
}
public String dot(){
List<LineChart.Dot> data1=new ArrayList<LineChart.Dot>()
, data2=new ArrayList<LineChart.Dot>()
, data3=new ArrayList<LineChart.Dot>();
for(double i=0;i<6.2;i+=0.2){
// line 1 dot
LineChart.Dot dot1 = new LineChart.Dot(Math.sin(i)*1.9+10);
dot1.setDotSize(5); // 点大小
dot1.setColour("#f00000"); // 设置点颜色
data1.add(dot1);
// line 2 dot
LineChart.Dot dot2 = new LineChart.Dot(Math.sin(i)*1.9+7);
dot2.setDotSize(3);
dot2.setHaloSize(1); // 点外空白大小
dot2.setColour("#3D5C56");
data2.add(dot2);
// line 3 dot
LineChart.Dot dot3 = new LineChart.Dot(Math.sin(i)*1.9+4);
dot3.setDotSize(4);
dot3.setHaloSize(2);
data3.add(dot3);
}
Date date = new Date();
Locale locale = new Locale("zh","CN");
DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.FULL, locale);
// line 1
LineChart line1 = new LineChart();
line1.setDotStyle(new LineChart.Style(LineChart.Style.Type.DOT));
line1.setWidth(1); // 线宽
line1.addDots(data1); // 增加数据
// line 2
LineChart line2 = new LineChart();
line2.setDotStyle(new LineChart.Style(LineChart.Style.Type.DOT));
line2.setColour("#3D5C56");
line2.setWidth(2);
line2.addDots(data2);
// line3
LineChart line3 = new LineChart();
line3.setDotStyle(new LineChart.Style(LineChart.Style.Type.DOT));
line3.setWidth(6);
line3.addDots(data3);
YAxis y = new YAxis();
y.setRange(0, 15, 5); // 设置Y柚范围，参数依次为最小值、最大值、间隔
ofcChart = new Chart();
ofcChart.setTitle(new Text(dateFormat.format(date))); // 设置标题
ofcChart.addElements(line1); // 增加线到图表
ofcChart.addElements(line2);
ofcChart.addElements(line3);
ofcChart.setYAxis(y); // 设置Y柚
return SUCCESS;
}
}
增加struts配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="ofc2" extends="ofc2-default">
<action name="line" class="com.xy.action.LineAction">
<result type="ofc2"/>
</action>
</package>
</struts>
在WebContent目录下增加line目录，目录下增加dot.html，对应官方示例Line Dot，dot.html内容如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Line Dot</title>
<script type="text/javascript" src="../jquery/jquery.js"></script>
<script type="text/javascript" src="../ofc2/js/swfobject.js"></script>
<script type="text/javascript" language="javascript">
$(document).ready(function(){
swfobject.embedSWF("../ofc2/open-flash-chart.swf",
"chart", "550", "300", "9.0.0",
"expressInstall.swf",
{"data-file":"line!dot"});
});
</script>
</head>
<body>
<div id="chart"></div>
</body>
</html>
这里用到了一点jquery的东西，请把jquery的包增加到相应目录下。
运行Tomcat，浏览器输入http://localhost:8080/OFC2Demo/line/dot.html，出下如下图表
