上传Excel文件在swing
我上传Excel文件并根据格式读取该文件，但问题是该文件不被读取。 我得到例外。 我添加所有必需的jar文件（dom4j-1.6.1，poi-3.9-20121203，poi-ooxml-3.9-20121203，poi-ooxml-schemas-3.9-20121203，xmlbeans-2.3.0）。 请告诉我我错了什么。 例外如下。
public class Csv_Upload extends JFrame implements ActionListener { public static JFrame f; JPanel panel; JButton b1,b2,b3,b4; JTextField txt1; JLabel l1; Font g,g1; JFileChooser fc; JTextArea log; File file1 ; String str; DBConnection connect=new DBConnection(); static private final String newline = "\n"; public Csv_Upload() { panel=(JPanel)getContentPane(); panel.setLayout(null); g=new Font("Georgia",Font.BOLD,22); g1=new Font("Georgia",Font.BOLD,15); panel.setBackground(new java.awt.Color(204, 230 , 255)); l1=new JLabel("Upload Excel File"); l1.setBounds(200, 50, 400, 30); l1.setFont(g); l1.setForeground(Color.RED); panel.add(l1); txt1=new JTextField(); txt1.setBounds(480, 150,200,40); panel.add(txt1); fc = new JFileChooser(); b1=new JButton("Browse File"); b1.setBounds(50, 150,200,40); b1.setFont(g1); b1.setForeground(Color.RED); panel.add(b1); b2=new JButton("Upload File"); b2.setBounds(260, 150,200,40); b2.setForeground(Color.RED); b2.setFont(g1); panel.add(b2); ImageIcon img=new ImageIcon("calender.png"); b3=new JButton(img); b3.setBounds(50, 230,50,30); b3.setForeground(Color.RED); b3.setFont(g1); panel.add(b3); b1.addActionListener(this); b2.addActionListener(this); b3.addActionListener(this); // b4.addActionListener(this); } @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == b1) { int returnVal = fc.showOpenDialog(Csv_Upload.this); if (returnVal == JFileChooser.APPROVE_OPTION) { file1 = fc.getSelectedFile(); str=String.valueOf(file1); System.out.println("file fath"+file1); } //Handle save button action. } if(e.getSource()==b2) { try { FileInputStream file = new FileInputStream(new File(str)); System.out.println("action performed in file"+file); XSSFWorkbook workbook = new XSSFWorkbook(file); XSSFSheet sheet = workbook.getSheetAt(0); Iterator<Row> rowIterator = sheet.iterator(); while (rowIterator.hasNext()) { Row row = rowIterator.next(); //For each row, iterate through all the columns Iterator<Cell> cellIterator = row.cellIterator(); while (cellIterator.hasNext()) { Cell cell = cellIterator.next(); switch (cell.getCellType()) { case Cell.CELL_TYPE_NUMERIC: System.out.print(cell.getNumericCellValue() + "\t"); break; case Cell.CELL_TYPE_STRING: System.out.print(cell.getStringCellValue() + "\t"); break; } } System.out.println(""); } file.close(); } catch (Exception e1) { e1.printStackTrace(); } } if(e.getSource().equals(b3)) { txt1.setText(new DatePicker(f).setPickedDate()); } } public static void main(String []s) { f=new Csv_Upload(); f.setVisible(true); f.setSize(750,500); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } } 堆栈跟踪：
Exception in thread "AWT-EventQueue-0" java.lang.NoSuchMethodError: org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(Ljava/io/InputStream;)V at ADD.Csv_Upload.actionPerformed(Csv_Upload.java:129) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$200(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)
类org.apache.poi.xssf.usermodel.XSSFWorkbook有一个接受java.io.InputStream的构造函数init方法 ， XSSFWorkbook位于poi-ooxml-schemas-3.9-20121203.jar 。 检查项目的dist目录中的README文件。 另外检查项目JAR的清单，应该看起来像这样：
Class-Path：lib / poi-3.9-20121203.jar lib / poi-ooxml-3.9-20121203.jar ...