ResultSet to Excel (*.xlsx) Table Using Apache POI
I am trying to write ResultSet to Excel (*.xlsx) Table using Apache Poi.
Invalid Table Object Error in Office Excel
However, even though it writes the Excel file without any error, when I try to open it in Office Excel 2013, it shows an error and removes the table object to give only plain data view.
Here is the rough Sample Code using this example:
public static void writeExcel(ResultSet rs, int sqliteRowCount, String dir) {
System.out.println("Writing Excel(*.xlsx) File...");
XSSFWorkbook workbook = null;
try {
if (rs != null) {
// Get ResultSet MetaData
ResultSetMetaData rsmd = rs.getMetaData();
// Number of columns
int numColumns = rsmd.getColumnCount();
// Number of rows
// + 1 for headers
int numRows = sqliteRowCount + 1;
workbook = new XSSFWorkbook();
// Create Excel Table
XSSFSheet sheet = workbook.createSheet("Text");
XSSFTable table = sheet.createTable();
table.setDisplayName("Test");
CTTable cttable;
cttable = table.getCTTable();
// Style configurations
CTTableStyleInfo style = cttable.addNewTableStyleInfo();
style.setName("TableStyleMedium16");
style.setShowColumnStripes(false);
style.setShowRowStripes(true);
// Set Table Span Area
AreaReference reference = new AreaReference(new CellReference(0, 0), new CellReference(numRows - 1, numColumns - 1));
cttable.setRef(reference.formatAsString());
cttable.setId(1);
cttable.setName("Test");
cttable.setDisplayName("Test");
cttable.setTotalsRowCount(numRows);
cttable.setTotalsRowShown(false);
// Create Columns
CTTableColumns columns = cttable.addNewTableColumns();
columns.setCount(numColumns);
// Create Column, Row, Cell Objects
CTTableColumn column;
XSSFRow row;
// Add Header and Columns
XSSFRow headerRow = sheet.createRow(0);
for (int i = 0; i < numColumns; i++) {
column = columns.addNewTableColumn();
column.setName("Column" + (i + 1));
column.setId(i + 1);
headerRow.createCell(i).setCellValue(rsmd.getColumnLabel(i + 1));
}
// Write each row from ResultSet
int rowNumber = 1;
while (rs.next()) {
row = sheet.createRow(rowNumber);
for (int y = 0; y < numColumns; y++) {
row.createCell(y).setCellValue(rs.getString(y + 1));
}
rowNumber++;
}
// Set AutoFilter
CTAutoFilter fltr = CTAutoFilter.Factory.newInstance();
fltr.setRef((new AreaReference(new CellReference(0, 0), new CellReference(numRows - 1, numColumns - 1))).formatAsString());
cttable.setAutoFilter(fltr);
// sheet.setAutoFilter(CellRangeAddress.valueOf((new AreaReference(new CellReference(0, 0), new CellReference(numRows - 1, numColumns - 1))).formatAsString()));
// Freeze Pan
sheet.createFreezePane(0, 1, 0, 2);
}
} catch (SQLException ex) {
System.out.println("SQL Error while writing Excel file!");
} finally {
try {
// Let's write the excel file now
if (workbook != null) {
String excelDir = dir + File.separator + "workbook.xlsx";
try (final FileOutputStream out = new FileOutputStream(excelDir)) {
workbook.write(out);
}
}
} catch (IOException ex) {
System.out.println("IO Error while writing Excel summary file!");
}
}
}
I know something is wrong with my code, but can't figure it out. Any idea, why this is happening, where would be potential mistake in my code.
Update 1:
Table XML file in Excel archive if created using Apache POI
<?xml version="1.0" encoding="UTF-8"?>
<table displayName="Test" ref="A1:B881" id="1" name="Test" totalsRowCount="881" xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" totalsRowShown="0"><autoFilter ref="A1:B881"/><tableColumns count="2"><tableColumn name="ID" id="1"/><tableColumn name="Name" id="2"/><tableStyleInfo name="TableStyleMedium2" showColumnStripes="true" showRowStripes="true"/></table>
Table XML file in Excel archive if table created manually
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<table xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" id="1" name="Table1" displayName="Table1" ref="A1:B881" totalsRowShown="0"><autoFilter ref="A1:B881"/><tableColumns count="2"><tableColumn id="1" name="ID"/><tableColumn id="2" name="Name"/></tableColumns><tableStyleInfo name="TableStyleLight9" showFirstColumn="0" showLastColumn="0" showRowStripes="1" showColumnStripes="0"/></table>
In addition, if I open the Excel archive, it does not have a theme folder in the one created by Apache POI but it is present in the one create manually in Office Excel. Strange.
Update 2: Sample executable code (Using Netbeans):
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package apachepoi_exceltest;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.apache.poi.ss.util.AreaReference;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFTable;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTTable;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTTableColumn;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTTableColumns;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTTableStyleInfo;
/**
*
*/
public class ApachePOI_ExcelTest {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
String outputDir = "Your Local Directory Here";
// TODO code application logic here
HashMap<String, String> dataMap = new HashMap<>();
dataMap.put("ID 1", "Dummy Name 1");
dataMap.put("ID 2", "Dummy Name 2");
dataMap.put("ID 3", "Dummy Name 3");
dataMap.put("ID 4", "Dummy Name 4");
writeExcel(dataMap, outputDir);
}
private static void writeExcel(HashMap<String, String> dataMap, String outputDir) {
System.out.println("Writing Excel(*.xlsx) Summary File...");
XSSFWorkbook workbook = null;
try {
// Number of columns
int numColumns = 2; // ID and Name
// Number of rows
int numRows = dataMap.size() + 1; // +1 for header
// Create Workbook
workbook = new XSSFWorkbook();
// Create Excel Table
XSSFSheet sheet = workbook.createSheet("Summary");
XSSFTable table = sheet.createTable();
table.setDisplayName("Test");
CTTable cttable;
cttable = table.getCTTable();
// Style configurations
CTTableStyleInfo style = cttable.addNewTableStyleInfo();
style.setName("TableStyleMedium16");
style.setShowColumnStripes(false);
style.setShowRowStripes(true);
// Set Tabel Span Area
AreaReference reference = new AreaReference(new CellReference(0, 0), new CellReference(numRows - 1, numColumns - 1));
cttable.setRef(reference.formatAsString());
cttable.setId(1);
cttable.setName("Test");
cttable.setDisplayName("Test");
cttable.setTotalsRowCount(numRows);
cttable.setTotalsRowShown(false);
// Create Columns
CTTableColumns columns = cttable.addNewTableColumns();
columns.setCount(numColumns);
// Create Column, Row, Cell Objects
CTTableColumn column;
XSSFRow row;
// Add ID Header
column = columns.addNewTableColumn();
column.setName("Column" + (1));
column.setId(1);
// Add Name Header
column = columns.addNewTableColumn();
column.setName("Column" + (1));
column.setId(1);
// Add Header Row
XSSFRow headerRow = sheet.createRow(0);
headerRow.createCell(0).setCellValue("ID");
headerRow.createCell(1).setCellValue("Name");
int rowNumber = 1;
for (Map.Entry<String, String> entry : dataMap.entrySet()) {
String id = entry.getKey();
String name = entry.getValue();
row = sheet.createRow(rowNumber);
row.createCell(0).setCellValue(id);
row.createCell(1).setCellValue(name);
rowNumber++;
}
// Set Filter (Below three lines code somehow not working in this example, so setting AutoFilter to WorkSheet)
// CTAutoFilter fltr = CTAutoFilter.Factory.newInstance();
// fltr.setRef((new AreaReference(new CellReference(0, 0), new CellReference(numRows - 1, numColumns - 1))).formatAsString());
// cttable.setAutoFilter(fltr);
sheet.setAutoFilter(CellRangeAddress.valueOf((new AreaReference(new CellReference(0, 0), new CellReference(numRows - 1, numColumns - 1))).formatAsString()));
// Freeze First Row as header Row
sheet.createFreezePane(0, 1, 0, 2);
} catch (Exception ex) {
System.out.println("Error while writing Excel summary file!");
} finally {
try {
// Lets write the Excel File Now
if (workbook != null) {
String excelDir = outputDir + File.separator + "workbook.xlsx";
try (final FileOutputStream out = new FileOutputStream(excelDir)) {
workbook.write(out);
}
}
} catch (IOException ex) {
System.out.println("IO Error while writing Excel summary file!");
}
}
}
}
Libraries Used:
ooxml-schemas-1.1.jar
poi-3.11-beta2-20140822.jar
poi-ooxml-3.11-beta2-20140822.jar
xmlbeans-2.6.0.jar
What's wrong with your code is a presence of a single line. "cttable.setTotalsRowCount(numRows);" Remove it and everything will work. If in doubt, compare the XML definitions of some working table created manually in Excel and the definitions created with Apache POI
I had the same issue.
Digging deeply, I found that for some table XML data in the XLSX package, Excel is changing a single > to > after performing the repair. The XML from POI makes sense (use < and > to surround XML elements) so I have no idea why Microsoft chooses to break it.
If its the same case for you, I'd not worry too much about it.
If you want to see if you have this particular difference:
You have not created your table correctly. Check:
Remove empty first header column(POI BUG) at the end
CTTable().getTableColumns().removeTableColumn(0);
Put debug into XSSFTable.class, method updateHeaders().
If your table is not created properly, then
XSSFRow row = sheet.getRow(headerRow);
will be NULL in
/**
* Synchronize table headers with cell values in the parent sheet.
* Headers <em>must</em> be in sync, otherwise Excel will display a
* "Found unreadable content" message on startup.
*/
@SuppressWarnings("deprecation")
public void updateHeaders(){
XSSFSheet sheet = (XSSFSheet)getParent();
CellReference ref = getStartCellReference();
if(ref == null) return;
int headerRow = ref.getRow();
int firstHeaderColumn = ref.getCol();
XSSFRow row = sheet.getRow(headerRow);
if (row != null && row.getCTRow().validate()) {
int cellnum = firstHeaderColumn;
for (CTTableColumn col : getCTTable().getTableColumns().getTableColumnArray()) {
XSSFCell cell = row.getCell(cellnum);
if (cell != null) {
col.setName(cell.getStringCellValue());
}
cellnum++;
}
}
}