如何使用Apache POI将Excel文档中的区域转换为表格? [英] How do I convert an area in an Excel doc to a table using Apache POI?
问题描述
我编写了一个应用程序，该应用程序使用Apache POI库中的XSSF类从数据库中获取数据并根据所述数据创建Excel文档.我已经导入了poi，poi-ooxml和poi-ooxml-schemas，所有版本均为4.1.0.
I've written an application that fetches data from a database and creates an Excel doc from said data using the XSSF classes in the Apache POI library. I've imported poi, poi-ooxml, and poi-ooxml-schemas, all version 4.1.0.
文件写得很好，打开文件之前没有错误，直到我取消注释表创建代码为止，我将其粘贴在下面:
The file gets written fine and there are no errors when opening the file until I uncomment the table creation code, which I'll paste below:
CellReference topLeft = new CellReference(sheet.getRow(3).getCell(0));
CellReference bottomRight = new CellReference(sheet.getRow(nextRow-1).getCell(3));
AreaReference tableArea = workbook.getCreationHelper().createAreaReference(topLeft, bottomRight);
XSSFTable dataTable = sheet.createTable(tableArea);
我添加了一些其他字段，只是为了排除一些潜在的问题:
I added a few additional fields just to rule out some potential issues:
int test = dataTable.getEndRowIndex(); //Returns 968, as expected
tableArea = dataTable.getArea(); //The area remains A4 to D968, as expected
int testColumns = dataTable.getColumnCount(); //Returns 4, as expected
int testRows = dataTable.getRowCount(); //Returns 968, as expected
在取消注释上面的代码后尝试打开工作簿时，出现以下错误:
When I attempt to open the workbook after uncommenting the above code, I get the following error:
我们发现'filename.xlsx'中的某些内容存在问题.您是否要我们尝试尽可能多地恢复?如果您信任此工作簿的来源，请单击是."
"We found a problem with some content in 'filename.xlsx'. Do you want us to try and recover as much as we can? If you trust the source of this workbook, click yes."
单击是"后，将显示不存在表的数据，并显示以下错误:已删除的零件:/xl/tables/table1.xml零件，具有XML错误.(表)装入错误.第2行，第94列."
After clicking yes, the data appears without the table present and the following error is displayed: "Removed Part: /xl/tables/table1.xml part with XML error. (Table) Load error. Line 2, column 94."
这令人困惑，因为所有迹象表明表中应该只有4列...任何人都知道可能会发生什么以及如何解决它?
This is confusing, as all indications show that there should only be 4 columns in the table... Anyone have a clue what might be going on and how to fix it?
推荐答案
Your XSSFTable lacks names. At least the display name must be set using XSSFTable.setDisplayName.
因此 dataTable.setDisplayName("Table1"); 应该可以解决您的问题.
So dataTable.setDisplayName("Table1"); should solve your issue.
如何检测?
首先创建一个简单的完整示例.然后，在使用 Excel 打开结果之后，记下该错误与/xl/tables/table1.xml 的行/列有关.然后，在解压缩 *.xlsx 后，打开/xl/tables/table1.xml .现在您应该找到错误的 XML :
First create a simple complete example. Then, after opening the result using Excel, note what row/column of the /xl/tables/table1.xml the error is about. Then do opening the /xl/tables/table1.xml after unzipping the *.xlsx. Now you should find, the erroneous XML is:
<table id="1" ref="A4:D..." xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main"><tableColumns count="4">
并且错误发生在 And the error is immediately after 现在将其与 Now compare that with 完整示例: 这篇关于如何使用Apache POI将Excel文档中的区域转换为表格?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！ .因此，第一个标签似乎不完整.
<table id="1" ref="A4:D..." xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">. So the first tag seems to be incomplete. XML Excel 本身创建的内容进行比较.您会发现 Excel table 元素始终会设置 name ="TableN" displayName ="TableN" .XML Excel itself creates. You will find that Excel table elements always will have name="TableN" displayName="TableN" set.import java.io.FileOutputStream;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.util.AreaReference;
import org.apache.poi.ss.util.CellReference;
import java.util.GregorianCalendar;
class CreateExcelTable {
public static void main(String[] args) throws Exception {
Object[][] data = new Object[][] {
new Object[] {"Text", "Date", "Number", "Boolean"},
new Object[] {"Text 1", new GregorianCalendar(2020, 0, 1), 1234d, true},
new Object[] {"Text 2", new GregorianCalendar(2020, 1, 15), 5678d, true},
new Object[] {"Text 3", new GregorianCalendar(2020, 2, 1), 90.1234, false},
new Object[] {"Text 4", new GregorianCalendar(2020, 3, 15), 567.89, false}
};
try (XSSFWorkbook workbook = new XSSFWorkbook();
FileOutputStream fileout = new FileOutputStream("Excel.xlsx") ) {
XSSFCellStyle dateCellStyle = workbook.createCellStyle();
dateCellStyle.setDataFormat(14);
XSSFSheet sheet = workbook.createSheet();
XSSFRow row = sheet.createRow(0);
XSSFCell cell = row.createCell(0);
cell.setCellValue("Lorem ipsum");
row = sheet.createRow(1);
cell = row.createCell(0);
cell.setCellValue("semit dolor");
int nextRow = 3;
int nextCol = 0;
for (Object[] dataRow : data) {
row = sheet.createRow(nextRow++);
nextCol = 0;
for (Object value : dataRow) {
cell = row.createCell(nextCol++);
if (value instanceof String) cell.setCellValue((String)value);
else if (value instanceof GregorianCalendar) {
cell.setCellValue((GregorianCalendar)value);
cell.setCellStyle(dateCellStyle);
}
else if (value instanceof Double) cell.setCellValue((Double)value);
else if (value instanceof Boolean) cell.setCellValue((Boolean)value);
}
}
CellReference topLeft = new CellReference(sheet.getRow(3).getCell(0));
CellReference bottomRight = new CellReference(sheet.getRow(nextRow-1).getCell(3));
AreaReference tableArea = workbook.getCreationHelper().createAreaReference(topLeft, bottomRight);
XSSFTable dataTable = sheet.createTable(tableArea);
//dataTable.setName("Table1");
dataTable.setDisplayName("Table1");
/*
//this styles the table as Excel would do per default
dataTable.getCTTable().addNewTableStyleInfo();
XSSFTableStyleInfo style = (XSSFTableStyleInfo)dataTable.getStyle();
style.setName("TableStyleMedium2");
style.setShowColumnStripes(false);
style.setShowRowStripes(true);
dataTable.getCTTable().addNewAutoFilter().setRef(tableArea.formatAsString());
*/
workbook.write(fileout);
}
}
}
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