jfreechart使用

    
    项目刚刚完成，里面有几个知识点是同志们共同奋斗才最终完成的，闲来无事，总结一下，以备后用。 项目采用了当前比较流行的Struts2(velocity)+Spring+Ibatis的架构

 JFreeChart配置安装
    1、解压jfreechart_0.9.21.zip到指定位置，其中source是jfreechart的源码，jfreechart-0.9.21-demo.jar是例子程序（该部分留给大家自己去研究）
    2、为了配置成功，我们需要关注的文件有如下三个：jfreechart-0.9.21.jar、lib\jcommon-0.9.6.jar、 lib\gnujaxp.jar
/**
 * @disc 生成曲线图
 * @return JFreeChart
 */
private JFreeChart createCurveChart(){
//时间曲线数据集合
TimeSeries timeSeries = fillDataSet();

TimeSeriesCollection lineDataset = new TimeSeriesCollection();
lineDataset.addSeries(timeSeries);
JFreeChart chart = ChartFactory.createTimeSeriesChart("游戏点击量", "日期", "点击量", lineDataset, true, true, true);

XYPlot plot = (XYPlot) chart.getPlot();
DateAxis dateaxis = (DateAxis)plot.getDomainAxis(); //对domain 轴上日期显示格式定义
SimpleDateFormat frm = new SimpleDateFormat("yyyyMMdd");
dateaxis.setDateFormatOverride(frm);
dateaxis.setLowerMargin(0.05);
dateaxis.setUpperMargin(0.05);
int height = 400 ;
// 创建渐变色对象
GradientPaint chartGP = new GradientPaint(0,0,new Color(245, 245, 245),0,height,new Color(250, 250, 250),false);    
chart.setBackgroundPaint(chartGP); // new Color(22, 255, 1) new Color(192,251,192)

long l = compareDateTime(maxString, minString);

long dayNumber = l/8;

dateaxis.setTickUnit(new DateTickUnit(DateTickUnit.DAY, (new Integer(dayNumber + "")).intValue()+1,frm));  

XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)plot.getRenderer();
BasicStroke realLine = new BasicStroke(2.0f);
xylineandshaperenderer.setSeriesStroke(0,realLine);

//设置网格背景颜色
plot.setBackgroundPaint(Color.white);

//设置网格竖线颜色
plot.setDomainGridlinePaint(new Color(6,6,6));
//设置网格横线颜色
plot.setRangeGridlinePaint(new Color(6,6,6));
//设置曲线图与xy轴的距离
plot.setAxisOffset(new RectangleInsets(0D, 0D, 0D, 10D));

//设置曲线显示各数据点的值
XYItemRenderer xyitem = plot.getRenderer();  
xyitem.setBaseItemLabelsVisible(true);  
xyitem.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
xyitem.setBaseItemLabelGenerator(new StandardXYItemLabelGenerator());
xyitem.setBaseItemLabelFont(new Font("Dialog", 1, 8));

//曲线颜色:红色
xyitem.setSeriesPaint(0,new Color(190,42,42));  
//设置曲线上数据点的类型：圆点
        xylineandshaperenderer.setSeriesShape(0, new java.awt.geom.Ellipse2D.Double(-3.5, -3.5, 7, 7));
//设置曲线是否显示数据点
xylineandshaperenderer.setBaseShapesVisible(true);
//设置第一条曲线数据点填充为黄色，如果一个图表有多条曲线可分别设置
xylineandshaperenderer.setSeriesFillPaint(0, new Color(255,202,0));
//应用填充色
xylineandshaperenderer.setUseFillPaint(true);    
plot.setRenderer(xyitem);

//设置子标题
TextTitle subtitle = new TextTitle(query.getBeginDate() + " -- " + query.getEndDate(), new Font("黑体", Font.BOLD, 12));
chart.addSubtitle(subtitle);
//设置主标题
chart.setTitle(new TextTitle("游戏点击量", new Font("隶书", Font.ITALIC, 15)));
chart.setAntiAlias(true);
return chart;
}
//曲线图

private TimeSeries fillDataSet() {

ArrayList reports  = (ArrayList)reportStatBO.queryGameClickReport(query,"GAME_REPORT_CLICK_DAY");
int size = reports.size();
listSize = size;
String gameName = "";
Integer year = new Integer(query.getBeginDate().substring(0, 4));
if(size>0){
ReportClick tempReportClick = (ReportClick)reports.get(0);
gameName = tempReportClick.getGame_name();
}else{
return  new TimeSeries(gameName + "游戏点击报表", Day.class);
}
TimeSeries timeSeries = new TimeSeries(gameName+ "游戏点击报表", Day.class);

xString = "天";
    timeSeries = new TimeSeries(gameName+ "游戏点击报表", Day.class);
    String[] a = new String[size];
   
    int i = 0;
    for(ReportClick reportClick:reports){
   
    String tmpDate = reportClick.getReport_date();
    a[i] = tmpDate;
    String realDate = tmpDate.substring(0,4) + "-" +  tmpDate.substring(4,6) + "-" + tmpDate.substring(6);
    Integer year1=new Integer(tmpDate.substring(0, 4));
Integer month=new Integer(tmpDate.substring(4, 6));
Integer day=new Integer(tmpDate.substring(6, 8));
timeSeries.add(new Day(day, month, year1),reportClick.getClick_count());
    i++;
    }
    Arrays.sort(a);
maxString = a[size-1];
minString = a[0];
return timeSeries;
}

/**
 * @disc 生成柱状图
* @return JFreeChart
*/
@SuppressWarnings( { "deprecation", "unused" })
private JFreeChart createBarChart(List reports) {

XYDataset dataset = getDataSet(reports);
JFreeChart tmpChart = ChartFactory.createTimeSeriesChart("推广任务存活量报表", // 图表标题
"时间", // 目录轴的显示标签
"存活量", // 数值轴的显示标签
dataset, // 数据集
true, // 是否显示图例(对于简单的柱状图必须是false)
true, // 是否生成工具
false); // 是否生成URL链接

XYPlot xyplot = (XYPlot) tmpChart.getPlot();

DateAxis dateaxis = (DateAxis) xyplot.getDomainAxis(); // 对domain
// 轴上日期显示格式定义
dateaxis.setDateFormatOverride(new SimpleDateFormat("yyyyMMdd"));
dateaxis.setLowerMargin(0.05);
dateaxis.setUpperMargin(0.05);
NumberAxis numberaxis = (NumberAxis) xyplot.getRangeAxis();
numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer) xyplot
.getRenderer();

if (reports != null && reports.size() > 0) {
String begin = reports.get(0).getReport_date();
String end = reports.get(reports.size() - 1).getReport_date();
String beginDate = begin.substring(0, 4) + "-"
+ begin.substring(4, 6) + "-" + begin.substring(6, 8);
String endDate = end.substring(0, 4) + "-" + end.substring(4, 6)
+ "-" + end.substring(6, 8);
int day = DateUtils.compare(beginDate, endDate);
if (day < 7)
dateaxis.setTickUnit(new DateTickUnit(DateTickUnit.DAY, 1));
// if(reports.size()==1)
// xylineandshaperenderer.setBaseShapesVisible(true);//数据点可见
xylineandshaperenderer.setBaseItemLabelsVisible(true);
// xylineandshaperenderer.setBaseOutlinePaint(Color.GRAY);
xylineandshaperenderer
.setItemLabelGenerator(new StandardXYItemLabelGenerator());
// xylineandshaperenderer.setItemLabelsVisible(true);
}

return tmpChart;
}

/**
* 查询数据,生成JFreeChart的数据集
*/
private XYDataset getDataSet(List reports) {

if (reports == null || reports.size() < 1)
return null;
TimeSeries timeseries = new TimeSeries(reports.get(0).getGame_name(),
Day.class);// 这里用的是Month.class，同样还有Day.class
// Year.class
// 等等

for (ReportPushLive tmpReport : reports) {
Integer year = new Integer(tmpReport.getReport_date().substring(0,
4));
Integer month = new Integer(tmpReport.getReport_date().substring(4,
6));
Integer day = new Integer(tmpReport.getReport_date()
.substring(6, 8));
timeseries.add(new Day(day, month, year), tmpReport.getBar_count());
}

TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();
timeseriescollection.addSeries(timeseries);

return timeseriescollection;
}

 

// 设置线条粗细度

 XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer) plot.getRenderer();
BasicStroke realLine = new BasicStroke(0.5f);
        
for(int i = 0; i < plot.getDataset().getSeriesCount(); i++){
       xylineandshaperenderer.setSeriesStroke(i, realLine);
}

 

NumberAxis numAxis = (NumberAxis) plot.getRangeAxis();
NumberFormat numFormater = NumberFormat.getNumberInstance();
DecimalFormat decimalFormat = new DecimalFormat("0.00");//设置格式
numAxis.setTickUnit(new NumberTickUnit(0.5));//设置Y轴间隔

Action里面需要配置图片的宽度和高度：
<action name="reportClickChart" method="getReportClickChart" class="reportClickAction">
 <result name="success" type="chart">
  <param name="height">400</param>
  <param name="width">750</param>
 </result>   
</action>