JFreeChart时前奏曲线图

JFreeChart时序曲线图

1.准备Jar包：jfreechart-1.0.13.jar和jcommon-1.0.16.jar

2.配置web.xml

<!-- JFreeChart -->
  	<servlet>
        <servlet-name>DisplayChart</servlet-name>
        <servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>DisplayChart</servlet-name>
        <url-pattern>/DisplayChart</url-pattern>
    </servlet-mapping>

 

3.Action(Struts2)

 

/**
	 * 曲线图
	 * */
	@SuppressWarnings("deprecation")
	public String quxiantu() throws Exception {
		String plateNum = request.getParameter("plateNum");
		String startDateTimeStr = request.getParameter("startTime");
		String stopDateTimeStr = request.getParameter("stopTime");
		List<Object[]> dataSet = mileageStatService.getVehicleFuelByPlateNum(plateNum, startDateTimeStr, stopDateTimeStr);
		
		//访问量统计时间线
		TimeSeries timeSeries = new TimeSeries(plateNum+"油耗统计", Minute.class);
		//时间曲线数据集合
		TimeSeriesCollection lineDataset = new TimeSeriesCollection();		 
		//构造数据集合
		for(Object[] obj : dataSet){
			timeSeries.addOrUpdate(new Minute(dateformat.parse(obj[0].toString())), Long.valueOf(obj[1].toString()));
		}
		lineDataset.addSeries(timeSeries);
		//**************************************************************************************
		//解决中文乱码
		StandardChartTheme standardChartTheme = new StandardChartTheme("JFree");  //或者为Legacy   
		standardChartTheme.setLargeFont(new Font("宋体", Font.BOLD, 12));   
		standardChartTheme.setRegularFont(new Font("宋体", Font.BOLD, 12));   
		standardChartTheme.setExtraLargeFont(new Font("宋体", Font.BOLD, 12));   
		standardChartTheme.setSmallFont(new Font("宋体", Font.BOLD, 12));   
		ChartFactory.setChartTheme(standardChartTheme);  
		//**************************************************************************************
		JFreeChart chart = ChartFactory.createTimeSeriesChart("油耗统计时间线", "时间", "油耗", lineDataset, true, true, true);		 
		//***********************************************************************************
		
		XYPlot plot = chart.getXYPlot();
		//设置网格背景颜色
		plot.setBackgroundPaint(Color.white);
		//设置网格竖线颜色
		plot.setDomainGridlinePaint(Color.LIGHT_GRAY);
		//设置网格横线颜色
		plot.setRangeGridlinePaint(Color.LIGHT_GRAY);
		//设置曲线图与xy轴的距离
		plot.setAxisOffset(new RectangleInsets(0D, 0D, 0D, 10D));
		//设置X轴（日期轴）
		DateAxis dateaxis = (DateAxis) plot.getDomainAxis();
		//时间轴间距是5分钟,格式为小时:分钟
		dateaxis.setTickUnit(new DateTickUnit(DateTickUnit.MINUTE, 30));
		dateaxis.setDateFormatOverride(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
		//X轴日期垂直显示(没找到倾斜多少度显示)
		dateaxis.setVerticalTickLabels(true);
		//***********************************************************************************
		//设置子标题
		TextTitle subtitle = new TextTitle(startDateTimeStr+" 到 "+stopDateTimeStr, new Font("宋体", Font.PLAIN, 12));
		chart.addSubtitle(subtitle);
		//设置主标题
		chart.setTitle(new TextTitle(plateNum+"油耗统计", new Font("黑体", Font.BOLD, 15)));
		chart.setAntiAlias(true);
		
		String filename = ServletUtilities.saveChartAsPNG(chart, 700, 500, null, request.getSession());
		String graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename;
		
		request.setAttribute("graphURL", graphURL);
		request.setAttribute("filename", filename);
		
		return "quxiantu";
	}

 

4.jsp

 

<img src="${graphURL}" width="550" height="350" border="0" usemap="#${filename}" >

 

附图：