Excel在“Data -> Outline -> Subtotal”菜单中提供了“分类汇总”选项。它自动创建子和和折叠数据的可能性。下图演示了该操作如何转换工作表。

这正是我需要通过POI做的事情。我知道如何在单元格中设置一个小计函数,这样我就可以自己计算中间和。但是我如何在左边框上启用这种折叠呢?
我意识到有groupRow()方法,但这些嵌套的组并不像它们应该的那样工作。如果我使用下面的代码,我只得到两个组。一个大的(1-7)和(1-3)。组(5-7)丢失,更改呼叫顺序无效。
sheet.groupRow(1, 7);
sheet.groupRow(1, 3);
sheet.groupRow(5, 7);发布于 2012-02-09 20:55:46
我使用了一个相当老的POI版本,但我是这样做的:
我还需要多个嵌套组,所以我有一个用于存储缩进级别的行的模型(它是一个树,所以缩进是隐式的)。我和一个访问者一起遍历了模型,以获得组的开始行号和结束行号。然后为每个组调用HSSFSheet.groupRow。如果我没记错的话,群呼的顺序很重要。
发布于 2016-11-18 21:39:39
我想这就是你要找的:
http://www.mysamplecode.com/2011/10/apache-poi-excel-row-group-collapse.html
如果使用subtotal(9,<range>)而不是sum(<range>),则可以执行嵌套组,因为小计将忽略其范围内具有小计的单元格
发布于 2020-10-30 01:32:51
使用下面的库,你可以计算出你想要的小计
<dependency>
<groupId>com.github.bld-commons.excel</groupId>
<artifactId>generator-excel</artifactId>
<version>3.1.1</version>
</dependency>这个库是apache poi的包装器。
以下是源代码:
package bld.generator.report.junit.entity;
import org.apache.poi.ss.usermodel.DataConsolidateFunction;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import bld.generator.report.excel.RowSheet;
import bld.generator.report.excel.annotation.ExcelCellLayout;
import bld.generator.report.excel.annotation.ExcelColumn;
import bld.generator.report.excel.annotation.ExcelFont;
import bld.generator.report.excel.annotation.ExcelSubtotal;
import bld.generator.report.excel.annotation.ExcelSubtotals;
@ExcelSubtotals(labelTotalGroup = "Total",endLabel = "total")
public class SalaryRow implements RowSheet {
@ExcelColumn(columnName = "Name", indexColumn = 0)
@ExcelCellLayout
private String name;
@ExcelColumn(columnName = "Amount", indexColumn = 1)
@ExcelCellLayout(horizontalAlignment = HorizontalAlignment.RIGHT)
@ExcelSubtotal(dataConsolidateFunction = DataConsolidateFunction.SUM,excelCellLayout = @ExcelCellLayout(horizontalAlignment = HorizontalAlignment.RIGHT,font=@ExcelFont(bold = true)))
private Double amount;
public SalaryRow() {
super();
}
public SalaryRow(String name, Double amount) {
super();
this.name = name;
this.amount = amount;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Double getAmount() {
return amount;
}
public void setAmount(Double amount) {
this.amount = amount;
}
}package bld.generator.report.junit.entity;
import javax.validation.constraints.Size;
import bld.generator.report.excel.SheetData;
import bld.generator.report.excel.annotation.ExcelHeaderLayout;
import bld.generator.report.excel.annotation.ExcelMarginSheet;
import bld.generator.report.excel.annotation.ExcelSheetLayout;
@ExcelSheetLayout
@ExcelHeaderLayout
@ExcelMarginSheet(bottom = 1.5,left = 1.5,right = 1.5,top = 1.5)
public class SalarySheet extends SheetData<SalaryRow> {
public SalarySheet(@Size(max = 31) String sheetName) {
super(sheetName);
}
}package bld.generator.report.junit;
import java.util.ArrayList;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import bld.generator.report.excel.BaseSheet;
import bld.generator.report.excel.GenerateExcel;
import bld.generator.report.excel.data.ReportExcel;
import bld.generator.report.junit.entity.SalaryRow;
import bld.generator.report.junit.entity.SalarySheet;
import bld.generator.report.utils.ExcelUtils;
@RunWith(SpringRunner.class)
@SpringBootTest
@ConfigurationProperties
@ComponentScan(basePackages = {"bld.generator","bld.read"})
@EnableTransactionManagement
public class SalaryTest {
private static final String PATH_FILE = "/mnt/report/";
@Autowired
private GenerateExcel generateExcel;
/**
* Sets the up.
*
* @throws Exception the exception
*/
@Before
public void setUp() throws Exception {
}
@Test
public void testSalary() throws Exception {
List<BaseSheet> listBaseSheet = new ArrayList<>();
SalarySheet salarySheet=new SalarySheet("salary");
salarySheet.getListRowSheet().add(new SalaryRow("a",2.0));
salarySheet.getListRowSheet().add(new SalaryRow("a",2.0));
salarySheet.getListRowSheet().add(new SalaryRow("a",2.0));
salarySheet.getListRowSheet().add(new SalaryRow("a",2.0));
salarySheet.getListRowSheet().add(new SalaryRow("c",1.0));
salarySheet.getListRowSheet().add(new SalaryRow("c",1.0));
salarySheet.getListRowSheet().add(new SalaryRow("c",1.0));
salarySheet.getListRowSheet().add(new SalaryRow("c",1.0));
listBaseSheet.add(salarySheet);
ReportExcel report=new ReportExcel("test", listBaseSheet);
byte[] byteReport = this.generateExcel.createFileXlsx(report);
ExcelUtils.writeToFile(PATH_FILE,report.getTitle(), ".xlsx", byteReport);
}
}在github上的项目链接下:
在结果下面。
https://stackoverflow.com/questions/9210861
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