Fairy tales are more than true: not because they tell us that dragons exist, but because they tell us that dragons can be beaten. ββ Neil Gaiman, Coraline
To be honest, I believe using Java to build charts is a disaster, as it often feels like struggling in the explicit
typed hell, accompanied by lengthy lines of code. However, it also piques my interest in finding ways to approach it
with a more loosely coupled mindset (not just dumping everything as pure Objects πΆ). With increased experience in Echarts and discovering
various tricks, I've become even more curious about the possibilities. Fortunately, I now have the time to delve into
this further. ( contents polished by ChartGPT-4)
Support JDK8+ with
"JDK Sympathy"(you do need upgrade it tho!)
It hosts on jitpack,
you can use the main-SNAPSHOT to fetch the latest version or the lock commit hash
version
Install via Gradle
repositories {
mavenCentral()
// add the repository
maven { url 'https://jitpack.io' }
}
dependencies {
implementation 'com.github.Koooooo-7.echarts4j:echarts4j-project:v1.0.0'
}
Install via Maven
<repositories>
<repository>
<id>jitpack.io</id>
<url>https://jitpack.io</url>
</repository>
</repositories>
<dependency>
<groupId>com.github.Koooooo-7.echarts4j</groupId>
<artifactId>echarts4j-project</artifactId>
<version>v1.0.0</version>
</dependency>
- Smooth builder APIs.
- Highly configurable chart options.
- Lots of beauty charts available.
- Closely to the full Echarts functionalities.
- Strong Extensibility.
- Live update support for displaying (see echarts4j-chart-server).
- Snapshot for image render (see echarts4j-snapshot-playwright).
- And more.
In a nutshell, it generates Apache Echarts options for the Echarts instance. If you already familiar with Echarts, you can quickly dive in.
- Take a quick look at the Echarts Demos to find what you need.
- Refer to the available Echarts Options to understand how to
configure.
(If it is missing inecharts4j, feel free to raise an Issue/PR π)
In general, there are three key aspects to understand about building an Echarts Chart in echarts4j:
- The
Canvas, which contains all the charts and resources (js, css...), functioning similarly to an HTML page by default. - The
Chart, representing a Chart instance, with generic chart configurations, such as Title, Toolbox, and more. - The
Series, which resides within the Charts, where each type of Series indicates the underlying chart type.
|ββββββββββββ
| Canvas |
| |
| ββββββ |
| | Chart |
| | ββββ |
| | |Series type=Bar |
| | ββββ |
| | |Series type=Line|
| (overlap different kinds of charts in one Chart)
| | ββββ |
| | |Series ... |
| | ββββ |
| ββββββ |
| Charts...|
| ββββββ |
| ββββββ |
| ββββββ |
βββββββββββ
More details please see the QuickStart and the JavaDoc , and the test cases also.
Basic Chart
Code
final String chartTitle = "My First echarts4j Bar";
final String legendFormatter = "'Top: {name}'";
final String seriesName = "Cole";
final String seriesName2 = "Peps";
try {
Canvas.builder()
.addCharts(BarChart.builder()
.options(ChartOption.builder()
.title(Title.builder()
.text(chartTitle).build())
.legend(Legend.builder()
.formatter(FuncStr.of(legendFormatter)).build())
.toolbox(Toolbox.builder()
.showTitle(true)
.feature(Toolbox.Feature.builder()
.saveAsImage(Toolbox.SaveAsImage.builder().build())
.restore(Toolbox.Restore.builder().build())
.dataView(Toolbox.DataView.builder().build())
.build())
.build())
.xAxis(XAxis.builder()
.data(x)
.build())
.yAxis(YAxis.builder().build())
.build()
.addSeries(BarChartSeries.builder()
.name(seriesName)
.data(data1)
.markLine(MarkLine.builder()
.data(Arrays.asList(MarkLine.MarkLineDataItem.builder()
.name("The Max")
.type("max")
.build(),
MarkLine.MarkLineDataItem.builder()
.name("The Min")
.type("min")
.build()))
.build())
.build())
.addSeries(BarChartSeries.builder()
.name(seriesName2)
.data(data2)
.build())
)
.build())
.build()
.renderTo(new File("bar.html"));
Overlap Charts
Code
final String chartTitle = "My Overlap Charts";
final String seriesName = "seriesName";
final String seriesName2 = "seriesName2";
final LineChart c = LineChart.builder()
.options(ChartOption.builder()
.title(Title.builder()
.text(chartTitle).build())
.legend(Legend.builder().build())
.xAxis(XAxis.builder()
.data(x)
.build())
.yAxis(YAxis.builder().build())
.build()
.addSeries(ListChartSeries.builder()
.name(seriesName)
.data(data1)
.build())
.addSeries(BarChartSeries.builder()
.name(seriesName2)
.data(data2)
.build())
)
.build();
final Canvas cvs = Canvas.builder()
.addCharts(c)
.build();
final Render render = RenderProvider.get();
render.render(cvs, new FileWriter("overlap.html"));
}
Dynamic Chart with Event and Action.
Code
final String chartTitle = "Dynamic Pie";
final String seriesName = "Access Source";
final List<String> legendData = Arrays.asList(
"Direct Access",
"Email Marketing",
"Affiliate Ads",
"Video Ads",
"Search Engines"
);
final DataHelper dataHelper = DataHelper.create()
.addValueField(Integer.class)
.addNameField()
.build()
.addData(335, "Direct Access")
.addData(310, "Email Marketing")
.addData(234, "Affiliate Ads")
.addData(135, "Video Ads")
.addData(1548, "Search Engines");
final List<String> center = Arrays.asList("50%", "60%");
final PieChart p = PieChart.builder()
.options(ChartOption.builder()
.animation(false)
.title(Title.builder()
.text(chartTitle)
.right("20")
.build())
.legend(Legend.builder()
.orient("vertical")
.left("left")
.data(legendData)
.build())
.build()
.addSeries(PieChartSeries.builder()
.name(seriesName)
.radius("55%")
.center(center)
.data(dataHelper.get())
.build())
)
.build()
.addJSFunction(FuncStr.of(actionWithEchartsInstance))
.addListener("'click'", FuncStr.of(clickAlterFunc))
.addListener("'legendselectchanged'", FuncStr.of(legendClickAlterFunc))
.addListener("'mousemove'", FuncStr.of("{ dataIndex: 3 }"), FuncStr.of(mouseMoveAlterFunc));
Canvas.builder()
.addCharts(p)
.build()
.renderTo(new File("dynamic-pie.html"));
- New feature and bug fix are both great.
- Issue driven or PR driven is better.
- Options enrichment is highly welcome.
Gratitude to all outstanding projects/libraries for their contributions in echarts4j.
Apache-2.0 license Β©KoyZhuang