如何在JavaFX应用程序中从Excel读取数据?
我正在用hibernate作为Java中的ORM创建一个JavaFX FXMl应用程序。我想从Excel中读取数据并使用hibernate将其存储到MySQL,但它无法创建工作簿 我花了数小时阅读教程和其他帖子,无论是在SO还是其他网站上,无论是接受的答案还是评论都对我没有帮助 在我的如何在JavaFX应用程序中从Excel读取数据?,java,excel,javafx,apache-poi,fxml,Java,Excel,Javafx,Apache Poi,Fxml,我正在用hibernate作为Java中的ORM创建一个JavaFX FXMl应用程序。我想从Excel中读取数据并使用hibernate将其存储到MySQL,但它无法创建工作簿 我花了数小时阅读教程和其他帖子,无论是在SO还是其他网站上,无论是接受的答案还是评论都对我没有帮助 在我的Form_Main.fxml文件中,我有一个按钮,用于调用相关方法从Excel读取数据。我添加了以下JAR文件: *poi-4.1.0 *poi-ooxml-4.1.0 *poi-ooxml-schemas-4.1
Form_Main.fxml
文件中,我有一个按钮,用于调用相关方法从Excel读取数据。我添加了以下JAR文件:*poi-4.1.0
*poi-ooxml-4.1.0
*poi-ooxml-schemas-4.1.0
*xmlbeans-3.0.1
*commons-collections4-4.2
对该项目的支持。我要读取的数据导入如下所示:
import org.apache.poi.xssf.usermodel.xssf工作簿;
导入org.apache.poi.xssf.usermodel.xssfheet;
导入org.apache.poi.xssf.usermodel.XSSFRow;
我定义的方法是:
FileInputStream\u File=newfileinputstream(新文件(“D:\\Students\u Info.xlsx”);
XSSF工作簿_工作簿=新XSSF工作簿(_文件);
XSSFSheet _Sheet=_工作簿.getSheetAt(0);
XSSFRow_行;
剩下的代码将使用hibernate将数据写入MySQL。但它不起作用
调试程序时,在第行:
XSSFWorkbook\u工作簿=新XSSFWorkbook(\u文件);
它跳转到第行的文件fxmloader.java
:
catch(InvocationTargetException异常){
抛出新的RuntimeException(异常);
}
我的堆栈跟踪(如果我是正确的)是:
[java]线程“JavaFX应用程序线程”java.lang.RuntimeException中的异常:java.lang.reflect.InvocationTargetException
[java]位于javafx.fxml.fxmloader$MethodHandler.invoke(fxmloader.java:1774)
[java]位于javafx.fxml.fxmloader$ControllerMethodEventHandler.handle(fxmloader.java:1657)
[java]位于com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
[java]位于com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
[java]位于com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
[java]位于com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
[java]位于com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
[java]位于com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
[java]位于com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
[java]位于com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
[java]位于com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
[java]位于com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
[java]位于com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
[java]位于com.sun.javafx.event.EventUtil.firevent(EventUtil.java:49)
[java]位于javafx.event.event.fireEvent(event.java:198)
[java]位于javafx.scene.Node.firevent(Node.java:8411)
[java]位于javafx.scene.control.Button.fire(Button.java:185)
[java]位于com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
[java]位于com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
[java]位于com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
[java]位于com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
[java]位于com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
[java]位于com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
[java]位于com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
[java]位于com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
[java]位于com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
[java]位于com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
[java]位于com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
[java]位于com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
[java]位于com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
[java]位于com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
[java]位于com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
[java]位于com.sun.javafx.event.EventUtil.firevent(EventUtil.java:54)
[java]位于javafx.event.event.fireEvent(event.java:198)
[java]位于javafx.scene.scene$MouseHandler.process(scene.java:3757)
[java]位于javafx.scene.scene$MouseHandler.access$1500(scene.java:3485)
[java]位于javafx.scene.scene.impl_processMouseEvent(scene.java:1762)
[java]位于javafx.scene.scene$ScenePeerListener.mouseEvent(scene.java:2494)
[java]位于com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:394)
[java]位于com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
[java]位于java.security.AccessController.doPrivileged(本机方法)
[java]位于com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$358(GlassViewEventHandler.java:432)
[java]位于com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:410)
[爪哇]
List<List<String>> excelData = ExcelFileUtility.readExcelFile("fileName.xlsx");
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.EncryptedDocumentException;
import org.apache.poi.ss.usermodel.Cell;
import static org.apache.poi.ss.usermodel.CellType.BLANK;
import static org.apache.poi.ss.usermodel.CellType.BOOLEAN;
import static org.apache.poi.ss.usermodel.CellType.FORMULA;
import static org.apache.poi.ss.usermodel.CellType.NUMERIC;
import static org.apache.poi.ss.usermodel.CellType.STRING;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
/**
*
* @author blj0011
*/
public class ExcelFileUtility
{
/**
* @param args the command line arguments
*/
public static void main(String[] args)
{
readExcelFileWithHeaderFirstRow("Copy of Database_Details_Report_AAA.xlsx", false).forEach((t) -> {
t.forEach((z) -> {
System.out.print(z + " - ");
});
System.out.println();
});
}
public static List<List<String>> readExcelFile(String fileName)
{
List<List<String>> excelContent = new ArrayList();
int columnCounter = 0;
int rowCounter = 0;
try (InputStream inputStream = new FileInputStream(fileName)) {
DataFormatter formatter = new DataFormatter();
Workbook workbook = WorkbookFactory.create(inputStream);
Sheet sheet = workbook.getSheetAt(0);
for (Row row : sheet) {
List<String> tempList = new ArrayList();
for (Cell cell : row) {
String text = formatter.formatCellValue(cell);
System.out.print(++columnCounter + ": " + text);
System.out.println(text.length());
tempList.add(text);
}
columnCounter = 0;
excelContent.add(tempList);
++rowCounter;
//Used for testing
//if (rowCounter == 5) {
// break;
//}
//System.out.println(String.join(" - ", tempList));
//System.out.println(tempList.size());
}
}
catch (IOException | EncryptedDocumentException ex) {
System.out.println(ex.toString());
}
return excelContent;
}
public static List<List<String>> readExcelFileWithHeaderFirstRow(String fileName, boolean allCellHaveData)
{
List<List<String>> sheetData = new ArrayList();
int headerCount = 0;
try (FileInputStream fis = new FileInputStream(fileName);
Workbook wb = WorkbookFactory.create(fis)) {
Sheet sheet = wb.getSheetAt(0);
for (int i = 0; i < sheet.getPhysicalNumberOfRows(); i++) {
Row row = sheet.getRow(i);
String value;
List<String> rowData = new ArrayList();
//System.out.println("\nROW " + row.getRowNum() + " has " + row.getPhysicalNumberOfCells() + " cell(s).");
//System.out.println("last cell number: " + row.getLastCellNum());
if (i == 0) {
headerCount = row.getLastCellNum();
}
for (int c = 0; c < row.getLastCellNum(); c++) {
Cell cell = row.getCell(c);
if (cell != null) {
switch (cell.getCellType()) {
case FORMULA:
value = "FORMULA value=" + cell.getCellFormula();
rowData.add(cell.getCellFormula());
break;
case NUMERIC:
value = "NUMERIC value=" + cell.getNumericCellValue();
rowData.add(Double.toString(cell.getNumericCellValue()));
break;
case STRING:
value = "STRING value=" + cell.getStringCellValue();
rowData.add(cell.getStringCellValue());
break;
case BLANK:
value = "<BLANK>";
rowData.add("");
break;
case BOOLEAN:
value = "BOOLEAN value-" + cell.getBooleanCellValue();
rowData.add(cell.getBooleanCellValue() ? "true" : "false");
break;
case ERROR:
value = "ERROR value=" + cell.getErrorCellValue();
rowData.add(Byte.toString(cell.getErrorCellValue()));
break;
default:
value = "UNKNOWN value of type " + cell.getCellType();
rowData.add(cell.getCellType().toString());
}
//System.out.println("CELL col=" + cell.getColumnIndex() + " VALUE=" + value);
}
else {
//System.out.println("CELL col=" + " VALUE=" + "<My Blank>");
rowData.add("<My Blank>");
}
}
if (!allCellHaveData) {
int currentRowCount = row.getLastCellNum();
while (currentRowCount < headerCount) {
rowData.add("<Blank end column>");
currentRowCount++;
}
}
sheetData.add(rowData);
}
}
catch (FileNotFoundException ex) {
System.out.println(ex);
}
catch (IOException ex) {
System.out.println(ex);
}
return sheetData;
}
}