本篇文章主要介绍，如何使用Apache POI组件生成折线图导出到word文档中，具体步骤看下文。
一、实现效果
Java使用POI技术生成折线图导出到word文档中，最终生成的折线图如下所示：
二、环境准备
编程语言：Java第三方依赖：Apache POI
Apache POI依赖代码如下所示：
<dependencies><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml-schemas</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-scratchpad</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.apache.xmlbeans</groupId><artifactId>xmlbeans</artifactId><version>3.1.0</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>ooxml-schemas</artifactId><version>1.4</version></dependency></dependencies>
三、具体代码
POI生成折线图代码如下所示（代码中几乎每个语句都写有注释，方便阅读和理解）：
package com.gitee.zhuyb.chart;import org.apache.poi.openxml4j.exceptions.InvalidFormatException;import org.apache.poi.util.Units;import org.apache.poi.xddf.usermodel.chart.*;import org.apache.poi.xwpf.usermodel.XWPFChart;import org.apache.poi.xwpf.usermodel.XWPFDocument;import java.io.FileOutputStream;import java.io.IOException;/*** @version 1.0.0* @Description: poi生成折线图* @Date: /12/25 18:14* @Copyright (C) ZhuYouBin*/public class LineChart {public static void main(String[] args) throws Exception {// 1、创建word文档对象XWPFDocument document = new XWPFDocument();// 2、创建chart图表对象,抛出异常XWPFChart chart = document.createChart(15 * Units.EMU_PER_CENTIMETER, 10 * Units.EMU_PER_CENTIMETER);// 3、图表相关设置chart.setTitleText("使用POI创建的折线图"); // 图表标题chart.setTitleOverlay(false); // 图例是否覆盖标题// 4、图例设置XDDFChartLegend legend = chart.getOrAddLegend();legend.setPosition(LegendPosition.TOP); // 图例位置:上下左右// 5、X轴(分类轴)相关设置XDDFCategoryAxis xAxis = chart.createCategoryAxis(AxisPosition.BOTTOM); // 创建X轴,并且指定位置xAxis.setTitle("日期（年月）"); // x轴标题String[] xAxisData = new String[] {"-01","-02","-03","-04","-05","-06","-07","-08","-09","-10","-11","-12",};XDDFCategoryDataSource xAxisSource = XDDFDataSourcesFactory.fromArray(xAxisData); // 设置X轴数据// 6、Y轴(值轴)相关设置XDDFValueAxis yAxis = chart.createValueAxis(AxisPosition.LEFT); // 创建Y轴,指定位置yAxis.setTitle("粉丝数（个）"); // Y轴标题Integer[] yAxisData = new Integer[]{10, 35, 21, 46, 79, 88,39, 102, 71, 28, 99, 57};XDDFNumericalDataSource<Integer> yAxisSource = XDDFDataSourcesFactory.fromArray(yAxisData); // 设置Y轴数据// 7、创建折线图对象XDDFLineChartData lineChart = (XDDFLineChartData) chart.createData(ChartTypes.LINE, xAxis, yAxis);// 8、加载折线图数据集XDDFLineChartData.Series lineSeries = (XDDFLineChartData.Series) lineChart.addSeries(xAxisSource, yAxisSource);lineSeries.setTitle("粉丝数", null); // 图例标题lineSeries.setSmooth(true); // 线条样式:true平滑曲线,false折线lineSeries.setMarkerSize((short) 6); // 标记点大小lineSeries.setMarkerStyle(MarkerStyle.CIRCLE); // 标记点样式// 9、绘制折线图chart.plot(lineChart);// 10、输出到word文档FileOutputStream fos = new FileOutputStream("H:\\poi\\lineChart.docx");document.write(fos); // 导出word// 11、关闭流fos.close();document.close();}}
以上，就是Java使用POI生成折线图导出到word文档（折线图）的步骤。
