我使用此代码生成gagawa图表:
private Img createChart(LatencyHistogram current, LatencyHistogram baseLine) {
Img image = null;
final CategoryDataset dataset = fillDataSet(current, baseLine);
final JFreeChart chart = ChartFactory.createBarChart(
"Latecny histogram", // chart title
"Type", // domain axis label
"Value", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // orientation
true, // include legend
true, // tooltips
false // urls
);
chart.setBackgroundPaint(java.awt.Color.white);
// save it to an image
try {
final ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
String latency_graph = Constants.LATENCY_GRAPH_NAME;
final String pathname = Constants.HTML_PAGES_PATH + "images/"+latency_graph;
final File file1 = new File(pathname);
ChartUtilities.saveChartAsPNG(file1, chart, 2200, 1000, info);
image = new Img("latency", "../images/"+latency_graph).setWidth("1300");
return image;
} catch (IOException e) {
e.printStackTrace();
}
return image;
}
我得到了这张图:
如何放大文字(x轴,y轴,图例和标题)?
答案 0 :(得分:0)
可能这会对你有所帮助。
CategoryPlot plot = chart.getCategoryPlot();
CategoryAxis axis = plot.getDomainAxis();
CategoryPlot p = chart.getCategoryPlot();
ValueAxis axis2 = p.getRangeAxis();
Font font = new Font("Dialog", Font.PLAIN, 25);
axis.setTickLabelFont(font);
Font font2 = new Font("Dialog", Font.PLAIN, 15);
axis2.setTickLabelFont(font2);
Font font3 = new Font("Dialog", Font.PLAIN, 25);
plot.getDomainAxis().setLabelFont(font3);
plot.getRangeAxis().setLabelFont(font3);
根据此Question
答案 1 :(得分:0)
JFreeChart (Javadoc)类似乎包含一个Font对象。它' S伤心地看到,开发商不能够默认字体的修改,但无论如何,在这里' S我是如何解决这个...
class CustomChartFactory extends ChartFactory{
public static JFreeChart createCustomBarChart(String title,
String categoryAxisLabel, String valueAxisLabel,
CategoryDataset dataset, PlotOrientation orientation,
boolean legend, boolean tooltips, boolean urls, Font font) {
ParamChecks.nullNotPermitted(orientation, "orientation");
CategoryAxis categoryAxis = new CategoryAxis(categoryAxisLabel);
ValueAxis valueAxis = new NumberAxis(valueAxisLabel);
BarRenderer renderer = new BarRenderer();
if (orientation == PlotOrientation.HORIZONTAL) {
ItemLabelPosition position1 = new ItemLabelPosition(
ItemLabelAnchor.OUTSIDE3, TextAnchor.CENTER_LEFT);
renderer.setBasePositiveItemLabelPosition(position1);
ItemLabelPosition position2 = new ItemLabelPosition(
ItemLabelAnchor.OUTSIDE9, TextAnchor.CENTER_RIGHT);
renderer.setBaseNegativeItemLabelPosition(position2);
} else if (orientation == PlotOrientation.VERTICAL) {
ItemLabelPosition position1 = new ItemLabelPosition(
ItemLabelAnchor.OUTSIDE12, TextAnchor.BOTTOM_CENTER);
renderer.setBasePositiveItemLabelPosition(position1);
ItemLabelPosition position2 = new ItemLabelPosition(
ItemLabelAnchor.OUTSIDE6, TextAnchor.TOP_CENTER);
renderer.setBaseNegativeItemLabelPosition(position2);
}
if (tooltips) {
renderer.setBaseToolTipGenerator(
new StandardCategoryToolTipGenerator());
}
if (urls) {
renderer.setBaseItemURLGenerator(
new StandardCategoryURLGenerator());
}
CategoryPlot plot = new CategoryPlot(dataset, categoryAxis, valueAxis,
renderer);
plot.setOrientation(orientation);
JFreeChart chart = new JFreeChart(title, font,
plot, legend);
currentTheme.apply(chart);
return chart;
}
}
这实际上是翻译整个源代码,找到here,并用构造函数中的给定字体对象替换默认字体对象。
对于您的代码,替换
final JFreeChart chart = ChartFactory.createBarChart(
"Latecny histogram", // chart title
"Type", // domain axis label
"Value", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // orientation
true, // include legend
true, // tooltips
false // urls
);
使用:
Font customFont = new Font("SansSerif", Font.BOLD, 25);
final JFreeChart chart = CustomChartFactory.createBarChart(
"Latecny histogram", // chart title
"Type", // domain axis label
"Value", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // orientation
true, // include legend
true, // tooltips
false, // urls
customFont //font
);
假设您已指定(customFont),应该可以解决这个问题。
作为参考,默认字体为
Static Final Font DEFAULT_TITLE_FONT = new Font("SansSerif", Font.BOLD, 18);
这样,整个图表通过替换默认字体使用相同的字体。 SAHIL.R2050的答案也是有效的,但它确实要求图表的每个部分都设置了字体。
我的答案很适合为所有自定义图表设置新的默认字体,而SAHIIL.R2050的答案更符合正确使用的套餐。 SAHIL.R2050的答案还允许您一次指定每个部分的大小而不是所有部分的大小。
总结一下ChartFactory / CustomChartFactory,它真正做的就是创建一个ChartTheme,然后使用它的apply()方法将它应用到图表中。
希望这有帮助。 :)