我正在尝试将我的 JTable 导出到 excel 文件。为此，我使用 apache POI-SS 和 apache POI-XSSF。首先，我用 sax 解析器解析我的 xml 文件并将其转换为 JTable，然后通过单击导出按钮，我想将我的 JTable 导出到 excel。我创建了 2 个类，第一个解析 xml 文件并创建一个Jtable 和第二个用于 Excel 导出。
我的问题是 excel 文件，它只包含 2 个元素：第一行包含 200000，第二行包含 100000……我试图找出问题所在，但徒劳无功……
这是“JTable_create”类：
package jtable_excel11;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class JTable_create {
public static Vector<Vector> rowData = new Vector<Vector>();
public static Vector<String> rowOne = new Vector<String>();
public static Vector<String> columnNames = new Vector<String>();
public static void main(String[] args) {
try {
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
DefaultHandler handler;
handler = new DefaultHandler() {
boolean bstaff = false;
boolean bfname = false;
boolean blname = false;
boolean bnname = false;
boolean bsalary = false;
private int i;
public void startElement(String uri, String localName,String qName,
Attributes attributes) throws SAXException {
System.out.println("Start Element :" + qName);
if (qName.equalsIgnoreCase("staff"))
{
rowOne = new Vector<String>();
bstaff = true;
}
if (qName.equalsIgnoreCase("FIRSTNAME")) {
bfname = true;
}
if (qName.equalsIgnoreCase("LASTNAME")) {
blname = true;
}
if (qName.equalsIgnoreCase("NICKNAME")) {
bnname = true;
}
if (qName.equalsIgnoreCase("SALARY")) {
bsalary = true;
}
}
public void endElement(String uri, String localName,
String qName) throws SAXException {
System.out.println("End Element :" + qName);
if ("staff".equals(qName)){
rowData.addElement(rowOne);
System.out.println("pffffffffff");
};
}
@Override
public void characters(char ch[], int start, int length) {
if (bfname) {
String s = new String(ch, start, length);
rowOne.addElement(s);
System.out.println("First Name : " + new String(ch, start, length));
bfname = false;
}
if (blname) {
rowOne.addElement (new String(ch, start, length));
System.out.println("Last Name : " + new String(ch, start, length));
blname = false;
}
if (bnname) {
rowOne.addElement (new String(ch, start, length));
System.out.println("Nick Name : " + new String(ch, start, length));
bnname = false;
}
if (bsalary) {
rowOne.addElement (new String(ch, start, length));
System.out.println("Salary : " + new String(ch, start, length));
bsalary = false;
}
System.out.println("longueur" + rowOne.size());
}
};
saxParser.parse("file.xml", handler);
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
columnNames.addElement("firstname");
columnNames.addElement("lastname");
columnNames.addElement("nickname");
columnNames.addElement("salary");
DefaultTableModel model = new DefaultTableModel(rowData, columnNames);
final JTable table = new JTable(model);
JScrollPane scrollPane = new JScrollPane(table);
JButton export = new JButton("Export");
export.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
try {
Escel1 exp = new Escel1();
exp.exportTable(table, new File("C:\\Documents and Settings\\Adm\\Bureau\\result.xlsx"));
} catch (IOException ex) {
System.out.println(ex.getMessage());
ex.printStackTrace();
}
}
});
frame.getContentPane().add("South", export);
frame.pack();
frame.setVisible(true);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
System.out.println("Fini!");
} catch (Exception e) {
e.printStackTrace();
}
}
}
第二类称为“Excel1”是以下内容：
package jtable_excel11;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import javax.swing.JTable;
import javax.swing.table.TableModel;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class Excel1 {
public Excel1() {}
public void exportTable(JTable table, File file) throws IOException {
System.out.println(" c bon !");
XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet sheet = workbook.createSheet("Sample sheet");
System.out.println(" workbook crée");
TableModel model= table.getModel();
HashMap<String, Object[]> data = new HashMap<String, Object[]>();
for(int i=0; i<model.getRowCount(); i++){
for(int j=0; j< model.getColumnCount(); j++){
data.put(i+"",new Object[]{model.getValueAt(i,j).toString()+"\t"});
System.out.println(model.getValueAt(i,j));
System.out.println(i);
System.out.println(j);
}
//data.put("\n");
}
Set<String> keyset = data.keySet();
int rownum = 0;
for (String key : keyset) {
Row row = sheet.createRow(rownum++);
Object[] objArr = data.get(key);
int cellnum = 0;
for (Object obj : objArr) {
Cell cell = row.createCell(cellnum++);
if (obj instanceof Date)
cell.setCellValue((Date) obj);
else if (obj instanceof Boolean)
cell.setCellValue((Boolean) obj);
else if (obj instanceof String)
cell.setCellValue((String) obj);
else if (obj instanceof Double)
cell.setCellValue((Double) obj);
}
}
try {
FileOutputStream out = new FileOutputStream(file);
workbook.write(out);
out.close();
System.out.println("Excel written successfully..");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
这是我的 XML 文件：
<?xml version="1.0" encoding="UTF-8"?>
<company>
<staff >
<firstname>yong</firstname>
<lastname>mook kim</lastname>
<nickname>mkyong</nickname>
<salary>100000</salary>
</staff>
<staff >
<firstname>low</firstname>
<lastname>yin fong</lastname>
<nickname>fong fong</nickname>
<salary>200000</salary>
</staff>
</company>
在 excel 文件中，我只有 2 行，分别包含 200000 和 100000 。
知道我该如何解决这个问题吗？提前致谢