POI处理Excel，条形图，散点图，折线图

一、引入Maven依赖
二、条形图实现
2.1实现效果展示
2.2 代码实现如下：
三、散点图实现-----对应Excel中的XY散点图
3.1初始数据准备
3.2实现效果展示
3.3代码实现如下：

项目中需要使用到Java来处理Excel图表的情况，记录一次Java使用POI来处理条形图，散点图，折线图。直接上代码：

一、引入Maven依赖

// An highlighted block
<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>4.1.2</version>
</dependency>
<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>ooxml-schemas</artifactId><version>1.4</version>
</dependency>

二、条形图实现

------------------------------------------条形图开始展示-------------------------------------------

2.1实现效果展示

2.2 代码实现如下：

// 处理条形图
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;import org.apache.poi.xddf.usermodel.XDDFSolidFillProperties;
import org.apache.poi.xddf.usermodel.chart.AxisCrossBetween;
import org.apache.poi.xddf.usermodel.chart.AxisCrosses;
import org.apache.poi.xddf.usermodel.chart.AxisPosition;
import org.apache.poi.xddf.usermodel.chart.BarDirection;
import org.apache.poi.xddf.usermodel.chart.ChartTypes;
import org.apache.poi.xddf.usermodel.chart.LegendPosition;
import org.apache.poi.xddf.usermodel.chart.XDDFBarChartData;
import org.apache.poi.xddf.usermodel.chart.XDDFCategoryAxis;
import org.apache.poi.xddf.usermodel.chart.XDDFCategoryDataSource;
import org.apache.poi.xddf.usermodel.chart.XDDFChartLegend;
import org.apache.poi.xddf.usermodel.chart.XDDFDataSourcesFactory;
import org.apache.poi.xddf.usermodel.chart.XDDFNumericalDataSource;
import org.apache.poi.xddf.usermodel.chart.XDDFValueAxis;
import org.apache.poi.xssf.usermodel.XSSFChart;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFDrawing;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTPlotArea;import com.ceshi.FileUtil;/*** @Author Lee* @Date 2021/3/20* POI实现Excel条形图**/
public class XSSFUtils {public static void main(String[] args) throws Exception{XSSFWorkbook wb = new XSSFWorkbook();String sheetName = "Sheet1";FileOutputStream fileOut = null;try {XSSFSheet sheet = wb.createSheet(sheetName);List<String> testList = new ArrayList<String>();testList.add("测试数据1");testList.add("测试数据2");testList.add("测试数据3");testList.add("测试数据4");testList.add("测试数据5");testList.add("测试数据6");testList.add("测试数据7");List<Integer> areaList = new ArrayList<Integer>();// 第二行，测试值areaList.add(-10);areaList.add(-90);areaList.add(98);areaList.add(95);areaList.add(85);areaList.add(77);areaList.add(32);//创建一个画布XSSFDrawing drawing = sheet.createDrawingPatriarch();//前四个默认0，[0,10]：从0列10行开始;[10,30]:宽度10个单元格，30向下扩展到30行XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 10, 10, 30);//创建一个chart对象XSSFChart chart = drawing.createChart(anchor);//标题chart.setTitleText("测试标题");//标题覆盖chart.setTitleOverlay(false);//图例位置XDDFChartLegend legend = chart.getOrAddLegend();legend.setPosition(LegendPosition.TOP);//分类轴标(X轴),标题位置XDDFCategoryAxis bottomAxis = chart.createCategoryAxis(AxisPosition.TOP);bottomAxis.setTitle("X轴标题");//值(Y轴)轴,标题位置XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);leftAxis.setTitle("Y轴标题");//CellRangeAddress(起始行号，终止行号， 起始列号，终止列号）//分类轴标(X轴)数据，单元格范围位置[0, 0]到[0, 6]
//          XDDFDataSource<String> countries = XDDFDataSourcesFactory.fromStringCellRange(sheet, new CellRangeAddress(0, 0, 0, 6));//直接传入数据处理XDDFCategoryDataSource countries = XDDFDataSourcesFactory.fromArray(testList.toArray(new String[testList.size()]));//数据1，单元格范围位置[1, 0]到[1, 6]
//          XDDFNumericalDataSource<Double> area = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 1, 0, 6));//直接传入数据处理XDDFNumericalDataSource<Integer> area = XDDFDataSourcesFactory.fromArray(areaList.toArray(new Integer[areaList.size()]));//bar：条形图，XDDFChartData可以看看可以实现的视图种类XDDFBarChartData bar = (XDDFBarChartData) chart.createData(ChartTypes.BAR, bottomAxis, leftAxis);leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);leftAxis.setCrossBetween(AxisCrossBetween.BETWEEN);//设置为可变颜色bar.setVaryColors(false);//条形图方向，纵向/横向：纵向bar.setBarDirection(BarDirection.COL);//图表加载数据，条形图1XDDFBarChartData.Series series1 = (XDDFBarChartData.Series) bar.addSeries(countries, area);//条形图例标题series1.setTitle("测试", null);XDDFSolidFillProperties fill = new XDDFSolidFillProperties();//条形图，填充颜色series1.setFillProperties(fill);CTPlotArea plotArea = chart.getCTChart().getPlotArea();//绘制chart.plot(bar);//柱状图1上显示数值plotArea.getBarChartArray(0).getSerArray(0).addNewDLbls();plotArea.getBarChartArray(0).getSerArray(0).getDLbls().addNewShowVal().setVal(true);plotArea.getBarChartArray(0).getSerArray(0).getDLbls().addNewShowLegendKey().setVal(false);plotArea.getBarChartArray(0).getSerArray(0).getDLbls().addNewShowCatName().setVal(false);plotArea.getBarChartArray(0).getSerArray(0).getDLbls().addNewShowSerName().setVal(false);//***** 非常重要，可以设置excel中的对应（以互补色代表负值），对于条形图有负数的情况，一定要设置，否则颜色无法填充plotArea.getBarChartArray(0).getSerArray(0).addNewInvertIfNegative().setVal(false);// 将输出写入excel文件String tmpFileName = "/data/tmp/" + System.currentTimeMillis() + ".xlsx";FileUtil.createNewFile(tmpFileName);fileOut = new FileOutputStream(tmpFileName);wb.write(fileOut);} catch (Exception e) {e.printStackTrace();} finally {wb.close();if (fileOut != null) {fileOut.close();}}}
}

------------------*明显的分割线-------------------------
重要提示：：如果条形图中有负值的情况，请务必设置这个
plotArea.getBarChartArray(0).getSerArray(0).addNewInvertIfNegative().setVal(false);
坑我已经踩过了，记录一下

------------------------------------------条形图End-------------------------------------------

三、散点图实现-----对应Excel中的XY散点图

------------------------------------------散点图Start-------------------------------------------

3.1初始数据准备

自己组装数据同样可以作为原始数据去画图，具体代码注释

3.2实现效果展示

3.3代码实现如下：

// 处理散点图
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;import org.apache.poi.ss.usermodel.ClientAnchor;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xddf.usermodel.PresetLineDash;
import org.apache.poi.xddf.usermodel.XDDFLineProperties;
import org.apache.poi.xddf.usermodel.XDDFPresetLineDash;
import org.apache.poi.xddf.usermodel.XDDFSolidFillProperties;
import org.apache.poi.xddf.usermodel.chart.AxisCrossBetween;
import org.apache.poi.xddf.usermodel.chart.AxisCrosses;
import org.apache.poi.xddf.usermodel.chart.AxisPosition;
import org.apache.poi.xddf.usermodel.chart.ChartTypes;
import org.apache.poi.xddf.usermodel.chart.LegendPosition;
import org.apache.poi.xddf.usermodel.chart.XDDFCategoryDataSource;
import org.apache.poi.xddf.usermodel.chart.XDDFChartLegend;
import org.apache.poi.xddf.usermodel.chart.XDDFDataSourcesFactory;
import org.apache.poi.xddf.usermodel.chart.XDDFNumericalDataSource;
import org.apache.poi.xddf.usermodel.chart.XDDFScatterChartData;
import org.apache.poi.xddf.usermodel.chart.XDDFValueAxis;
import org.apache.poi.xssf.usermodel.XSSFChart;
import org.apache.poi.xssf.usermodel.XSSFDrawing;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;/*** @Author Lee* @Date 2021/3/20* POI实现Excel条形图**/
public class XSSFUtils {public static void main(String[] args) throws Exception{String tmpFileName = "/data/tmp/testzhexiantu.xlsx";File file = new File(tmpFileName);System.out.println(file.exists());InputStream fis = new FileInputStream(file);XSSFWorkbook wb = new XSSFWorkbook(fis);XSSFSheet sheet = wb.getSheetAt(0);//创建一个画布XSSFDrawing drawing = sheet.createDrawingPatriarch();//前四个默认0，[0,25]：从0列25行开始;[15,45]:宽度15个单元格，45向下扩展到45行ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 25, 15, 45);//创建一个chart对象XSSFChart chart = drawing.createChart(anchor);//标题chart.setTitleText("测试标题1");//标题覆盖chart.setTitleOverlay(false);//图例位置XDDFChartLegend legend = chart.getOrAddLegend();legend.setPosition(LegendPosition.TOP);//分类轴标(X轴),标题位置   //****** 如果是多条线，且X轴时数值类型的，切记：：：：要用XDDFValueAxisXDDFValueAxis bottomAxis = chart.createValueAxis(AxisPosition.TOP);
//          //****** 如果是多条线，用XDDFCategoryAxis，会出现乱码情况//XDDFCategoryAxis bottomAxis = chart.createXCategoryAxis(AxisPosition.TOP);bottomAxis.setTitle("测试标题2");//值(Y轴)轴,标题位置XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.BOTTOM);leftAxis.setTitle("测试标题3");//CellRangeAddress(起始行号，终止行号， 起始列号，终止列号）//分类轴标(X轴)数据，单元格范围位置[0, 0]到[0, 6]XDDFNumericalDataSource<Double> x = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(2, 7, 0, 0));
//          //已有数值处理//XDDFNumericalDataSource<Integer> x = XDDFDataSourcesFactory.fromArray(xList.toArray(new Integer[xList.size()]));//数据，单元格范围位置[1, 0]到[1, 6]
//          XDDFNumericalDataSource<Double> area = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 1, 0, 6));//XDDFNumericalDataSource<Integer> area = XDDFDataSourcesFactory.fromArray(new Integer[] {17098242,9984670,9826675,9596961,8514877,7741220,3287263});XDDFNumericalDataSource<Double> y = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(2, 7, 1, 1));//已有数值处理//XDDFNumericalDataSource<Integer> y = XDDFDataSourcesFactory.fromArray(yList.toArray(new Integer[yList.size()]));//          XDDFNumericalDataSource<Integer> x1 = XDDFDataSourcesFactory.fromArray(x1List.toArray(new Integer[x1List.size()]));//scatter：XY散点图XDDFScatterChartData scatter = (XDDFScatterChartData) chart.createData(ChartTypes.SCATTER, bottomAxis, leftAxis);leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);leftAxis.setCrossBetween(AxisCrossBetween.BETWEEN);//设置为可变颜色//         //图表加载数据，条形图1XDDFSolidFillProperties fill = new XDDFSolidFillProperties();XDDFScatterChartData.Series series1 = (XDDFScatterChartData.Series) scatter.addSeries(x, y);
//          //条形图例标题series1.setTitle("测试1", null);XDDFCategoryDataSource x1 = XDDFDataSourcesFactory.fromStringCellRange(sheet, new CellRangeAddress(12, 14, 0, 0));XDDFNumericalDataSource<Double> y1 = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(12, 14, 1, 1));//图表加载数据，条形图1XDDFScatterChartData.Series series2 = (XDDFScatterChartData.Series) scatter.addSeries(x1, y1);
//          //条形图例标题series2.setTitle("测试2", null);
//          scatter.addSeries(x1, y1);//条形图，填充颜色series2.setFillProperties(fill);XDDFNumericalDataSource<Double> x2 = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(19, 21, 0, 0));XDDFNumericalDataSource<Double> y2 = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(19, 21, 1, 1));
//          //图表加载数据，条形图1XDDFScatterChartData.Series series3 = (XDDFScatterChartData.Series) scatter.addSeries(x2, y2);
//          //条形图例标题series3.setTitle("测试3", null);
//          XDDFLineProperties line4 = new XDDFLineProperties();line4.setPresetDash(new XDDFPresetLineDash(PresetLineDash.DASH_DOT));//虚线series3.setLineProperties(line4);//条形图，填充颜色series3.setFillProperties(fill);//绘制chart.plot(scatter);FileOutputStream fileOut = new FileOutputStream(tmpFileName);wb.write(fileOut);wb.close();}
}

重要提示：：如果是多条线，且X轴时数值类型的，切记：：：要用XDDFValueAxis
如果使用XDDFCategoryAxis，X轴会把每个值作为一个点来处理，X轴会出现韩文，乱码
坑我已经踩过了，记录一下

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