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Daily stock candlestick chart (investment research) — generate this PDF with Java (K)

JQuick-PdfBiz Demo

K1 页 A4 · 123 KB

Daily candlesticks of a stock for December 2024: red and green bodies show the day's rise or fall and the wicks show the high and low, with trading days on the axis plus notes on the early-month rally, mid-month pullback and moving-average support.

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Daily stock candlestick chart (investment research) — K
Rendered output

Output specs

PDF pages
1
Chart type
K
Template lines
36
Source lines
106

Java source · JQuickBiz60KChartTest.java

This is the complete test class that produced the PDF above — copy it and run as-is; see the quick-start section for the Maven dependency.

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright (c) [2025-2099] Martin ([email protected])
 */
package com.github.paohaijiao.demo.biz;

import com.github.paohaijiao.JOption;
import com.github.paohaijiao.axis.JCategoryAxis;
import com.github.paohaijiao.config.JPdfConfig;
import com.github.paohaijiao.demo.constant.JQuickConstant;
import com.github.paohaijiao.enums.JChartType;
import com.github.paohaijiao.executor.JQuickPdfFactory;
import com.github.paohaijiao.factory.JChartRendererFactory;
import com.github.paohaijiao.series.JCandlestick;
import org.junit.Test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Arrays;

/**
 * 业务场景 Demo 60：股票日 K 线图（投资研究）
 *
 * <p>业务场景：投资研究部门以 K 线（蜡烛图）展示某股票 2024 年 12 月的日交易数据，
 * 实体为开收盘价区间，上下影线为最高与最低价，用于技术分析。</p>
 * <p>实际图表类型：{@link JChartType#K} K 线图。</p>
 *
 * <p>模板：{@code report/biz/60_k_chart.txt}；图表以 SVG 文本形式绑定到模板的
 * {@code ${svg}} 占位符，输出到 {@code D:\test\biz\60_k_chart.pdf}。</p>
 *
 * <p>图表尺寸说明：图表按 700pt × 380pt 的横版比例设计；模板中 {@code <svg>}
 * 只声明宽度、不声明高度，宽度被页面自动收窄时高度会按原比例同步缩放。</p>
 *
 * @author Martin
 * @version 1.0.0
 */
public class JQuickBiz60KChartTest {

    public static final String path = JQuickConstant.path;

    @Test
    public void biz60KChart() throws IOException {
        // 2024 年 12 月交易日（共 22 个交易日，此处简化取前 15 个）
        String[] dates = {"12-02", "12-03", "12-04", "12-05", "12-06", "12-09", "12-10",
                "12-11", "12-12", "12-13", "12-16", "12-17", "12-18", "12-19", "12-20"};
        // 每组数据：[open, close, min, max]
        double[][] kData = {
                {32.10, 32.85, 31.90, 33.00},
                {32.80, 33.40, 32.50, 33.60},
                {33.30, 32.90, 32.60, 33.50},
                {32.95, 33.80, 32.80, 34.00},
                {33.70, 34.20, 33.50, 34.50},
                {34.10, 33.60, 33.20, 34.30},
                {33.55, 34.10, 33.30, 34.40},
                {34.00, 34.60, 33.80, 34.80},
                {34.50, 35.20, 34.30, 35.50},
                {35.10, 34.70, 34.40, 35.30},
                {34.65, 35.00, 34.20, 35.20},
                {34.95, 35.40, 34.80, 35.70},
                {35.30, 34.80, 34.50, 35.60},
                {34.75, 35.10, 34.40, 35.30},
                {35.00, 35.60, 34.90, 35.90}
        };

        JCandlestick candlestick = new JCandlestick("日 K 线");
        // 注意：JCandlestick.data(open, close, min, max) 内部 super.data(kData) 会把
        // Object[] 按可变参数展开成 4 个独立元素，导致渲染器拿不到 Object[] 格式的 K 线数据。
        // 这里直接向 data 列表中逐条添加 Object[]{open, close, min, max}。
        for (double[] d : kData) {
            candlestick.data().add(new Object[]{d[0], d[1], d[2], d[3]});
        }

        JOption option = new JOption();
        option.title("某股票 2024 年 12 月日 K 线图", "单位：元 | 数据来源：行情系统");
        option.xAxis(new JCategoryAxis().data((Object[]) dates));
        option.series(candlestick);

        String svg = JChartRendererFactory.renderChart(JChartType.K, option);

        File dir = new File(path + "biz");
        if (!dir.exists()) {
            dir.mkdirs();
        }
        FileOutputStream fileOutputStream = new FileOutputStream(path + "biz/60_k_chart.pdf");
        JPdfConfig config = new JPdfConfig();
        config.getLayoutConfig().setFlexLayout(true);
        JQuickPdfFactory factory = new JQuickPdfFactory(config);
        factory.bind("svg", svg);
        byte[] bytes = factory.executeResource("report/biz/60_k_chart.txt");
        fileOutputStream.write(bytes);
        fileOutputStream.close();
    }
}

Minimal invocation (3 lines)

Skip the full test class — the core is these three lines: bind the chart SVG, execute the template, get the PDF bytes. Copy them straight into your project.

// config 可省略；svg 来自 JChartRendererFactory.renderChart(...)，见下方完整源码
factory.bind("svg", svg);
byte[] pdf = new JQuickPdfFactory(config).executeResource("report/biz/60_k_chart.txt");

Template file · 60_k_chart.txt

An HTML-like template with inline CSS that renders to PDF once bound to data. The full template is below — copy it or download the raw file.

<pdf>
<body>
  // 60 K线图（蜡烛图）Demo：展示一段时间内的开盘、收盘、最高、最低价格
  <div style="background:#263238; padding:12px; borderRadius:4px; marginBottom:10px; keepTogether:true">
    <div style="display:flex; justifyContent:space-between">
      <div style="width:320px">
        <h1 style="color:white; fontSize:17; bold:true; marginBottom:3px">'某股票 2024 年 12 月日 K 线图'</h1>
        <p style="color:#B0BEC5; fontSize:9">'红色/绿色实体表示当日涨跌，上下影线表示最高与最低价'</p>
      </div>
      <div style="width:220px; textAlignment:right; borderLeft:1px solid #546E7A; paddingLeft:10px">
        <p style="color:white; fontSize:9">'交易周期：2024 年 12 月'</p>
        <p style="color:#B0BEC5; fontSize:9">'数据频率：日线'</p>
        <p style="color:#B0BEC5; fontSize:9">'编制：投资研究部'</p>
      </div>
    </div>
  </div>

  <div style="marginBottom:10px; padding:10px; backgroundColor:#F7F9FC; borderRadius:4px; borderTop:2px solid #263238">
    <h2 style="color:#263238; marginBottom:6px; fontSize:13; bold:true">'一、12 月日 K 线走势'</h2>
    <div style="display:flex; justifyContent:center">
      <svg style="width:700pt">${svg}</svg>
    </div>
    <p style="fontSize:9; color:#6c757d; italic:true; marginTop:6px">'图 1  K 线图：实体为开收盘价区间，上影线为最高价，下影线为最低价（数据来源：行情系统）'</p>
  </div>

  <list style="listStyleType:disc; paddingLeft:16px; fontSize:10">
    <li style="marginBottom:6px"><span style="bold:true; color:#263238">'月初震荡上行：'</span>'连续收阳，成交量温和放大，多头占优。'</li>
    <li style="marginBottom:6px"><span style="bold:true; color:#263238">'中旬高位回调：'</span>'出现长上影线，上方抛压较重，需警惕短期见顶。'</li>
    <li style="marginBottom:6px"><span style="bold:true; color:#263238">'建议：'</span>'关注 20 日均线支撑，若有效跌破可考虑减仓避险。'</li>
  </list>

  <lineSeparator style="strokeColor:#DCE3EC"></lineSeparator>
  <p style="color:#6c757d; fontSize:8; textAlignment:center; marginTop:6px">'生成时间：2025年1月6日　|　批准人：研究总监'</p>
</body>
</pdf>

More demos in this group

The PDF, preview image, template and source code on this page were all produced by a real JQuick-Pdf run and are free to copy into your own project.