【java】实现导出Excel文件和XML文件
一、功能简述
点击“导出”按钮，弹出文件选择对话框，选择存放路径，填写文件名，点击“导出”按钮导出界面上table中的数据到指定路径
添加：dom4j-1.6.1.jar，用于XML
二、实现效果
2.1 界面数据
2.2 文件选择对话框
2.3 导出成功后，文件内容
三、代码
public class ExportFileService {
private static final String SAVEPATH = "D:\\";
private static final String BUTTONTEXT = "导出";
private static final String TITLE = "导出数据";
public ExportFileService(){
}
/**
*
* @param filters 可选择的导出类型
* @return file[0] 文件全路径；file[1] 导出类型
*/
public static String[] exportFile(List<FileFilter> filters){
JFileChooser fileChooser = initEmportFile(filters);
int result = fileChooser.showOpenDialog(null);
String type = fileChooser.getFileFilter().getDescription();
if (result == JFileChooser.APPROVE_OPTION) {
File file = fileChooser.getSelectedFile();
String fn = file.getPath();
String[] fileAndType = new String[2];
fileAndType[0]=fn;
fileAndType[1]=type;
return fileAndType;
}
return null;
}
/**
* 文件对话框中判断是否覆盖已存在文件，加入带导入类型
* @param filters 可选择的导入类型
* @return 文件选择框
*/
private static JFileChooser initEmportFile(List<FileFilter> filters) {
JFileChooser fileChooser = new JFileChooser(SAVEPATH) {
private static final long serialVersionUID = 1L;
public void approveSelection() {
File file;
String fileName = this.getSelectedFile().getAbsolutePath();
file = new File(fileName);
if (file.exists()) {
int copy = JOptionPane.showConfirmDialog(null,
"是否要覆盖当前文件？", "保存", JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE);
if (copy == JOptionPane.YES_OPTION) {
super.setSelectedFile(file);
super.approveSelection();
}
} else
super.approveSelection();
}
};
fileChooser.setAcceptAllFileFilterUsed(false);
fileChooser.setApproveButtonText(BUTTONTEXT);
fileChooser.setDialogTitle(TITLE);
for(FileFilter one :filters){
fileChooser.addChoosableFileFilter( one);
}
return fileChooser;
}
/**
* 创建新的Excel 工作簿
* @param filename 待导出文件名称的全路径，不带后缀
* @param data 待导出数据，首个list<Object>是字段信息
* @param sheetName 表单名称
* @return true 导出成功；false 导出失败
*/
@SuppressWarnings("deprecation")
public static boolean createExcel(String filename, List<List<Object>> data,
String sheetName) {
HSSFWorkbook workbook = null;
HSSFSheet sheet = null;
HSSFRow[] rows = null;
HSSFCell[][] cells = null;
workbook = new HSSFWorkbook();
if (sheetName.trim().equals("")) {
sheet = workbook.createSheet("表");
} else {
sheet = workbook.createSheet(sheetName);
}
try {
int row = 0;
int col = 0;
if (data.size() > 0) {
row = data.size();
col = data.get(0).size();
}
rows = new HSSFRow[row];
cells = new HSSFCell[row][col];
for (int i = 0; i < data.size(); i++) {
rows[i] = sheet.createRow((short) i);
for (int j = 0; j < data.get(i).size(); j++) {
cells[i][j] = rows[i].createCell((short) j);
cells[i][j].setCellType(HSSFCell.CELL_TYPE_STRING);
if (data.get(i).get(j) != null
&& !data.get(i).get(j).toString().trim().equals("")) {
cells[i][j].setCellValue(data.get(i).get(j).toString()
.trim());
} else {
cells[i][j].setCellValue("");
}
}
}
FileOutputStream fOut = new FileOutputStream(filename);
// 把相应的Excel 工作簿存盘
workbook.write(fOut);
fOut.flush();
// 操作结束，关闭文件
fOut.close();
return true;
} catch (Exception e) {
return false;
}
}
/**
* 生成XML文件
* @param filename 待导出文件名称的全路径，不带后缀
* @param data 待导出数据,首个list<Object>是字段信息
* @return true 导出成功；false 导出失败
*/
public static boolean createXML(String filename, List<List<Object>> data) {
Document doc = DocumentHelper.createDocument();
Element root = doc.addElement("root");
List<Object> name = data.get(0);
for (int i = 1; i < data.size(); i++) {
Element row = root.addElement("row");
for (int j = 0; j < name.size(); j++) {
Element cell = row.addElement("col" + j);
cell.setText(null == data.get(i).get(j) ? "" : data.get(i)
.get(j).toString());
cell.addAttribute("name", name.get(j).toString());
}
}
try {
FileOutputStream fOut = new FileOutputStream(filename);
OutputFormat format = new OutputFormat(" ", true);
format.setEncoding("utf-8");
// 可以把System.out改为你要的流。
XMLWriter xmlWriter = new XMLWriter(fOut, format);
xmlWriter.write(doc);
xmlWriter.close();
return true;
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
}
/**
* XML文件类型
* @author rwq
*
*/
public class MyFileFilterXML extends javax.swing.filechooser.FileFilter {
private List<String> ext=new ArrayList<String>();
public MyFileFilterXML(){
ext.add(".XML");
ext.add(".xml");
}
public List<String> getExt() {
return ext;
}
public boolean accept(java.io.File pathname) {
String fn = pathname.getAbsolutePath().toString();
if (fn.length() > 4)
fn = fn.substring(fn.length() - 4, fn.length());
if (ext.contains(fn)|| pathname.isDirectory())
return true;
return false;
}
public String getDescription() {
return "XML文件(*.xml)";
}
}
/**
* Excel文件类型
* @author rwq
*
*/
public class MyFileFilterExcel extends javax.swing.filechooser.FileFilter {
private List<String> ext=new ArrayList<String>();
public MyFileFilterExcel(){
ext.add(".XLS");
ext.add(".xls");
ext.add("xlsx");
ext.add("XLSX");
}
public List<String> getExt() {
return ext;
}
public boolean accept(java.io.File pathname) {
String fn = pathname.getAbsolutePath().toString();
if (fn.length() > 4){
fn = fn.substring(fn.length() - 4, fn.length());
}
if (ext.contains(fn) || pathname.isDirectory()){
return true;
}
return false;
}
public String getDescription() {
return "Excel文件(*.xls,*.xlsx)";
}
}
四、调用方式
/**
* 导出
*/
private void export() {
MyFileFilterExcel excelFilter = new MyFileFilterExcel();
MyFileFilterXML xmlFilter = new MyFileFilterXML();
List<FileFilter> filters = new ArrayList<FileFilter>();
filters.add(excelFilter);
filters.add(xmlFilter);
boolean createFileRs = false;
String[] pathAndTypeStr = ExportFileService.exportFile(filters);
if(pathAndTypeStr==null){
return ;
}
List<List<Object>> data = changeDataToFile();
if (pathAndTypeStr[1].equals(excelFilter.getDescription())) {
pathAndTypeStr[0] = pathAndTypeStr[0] + ".xls";
createFileRs = ExportFileService.createExcel(pathAndTypeStr[0], data,
viewAccountV.comboxYearAndMonth.getSelectedItem().toString());
} else if (pathAndTypeStr[1].equals(xmlFilter.getDescription())) {
pathAndTypeStr[0] = pathAndTypeStr[0] + ".xml";
createFileRs = ExportFileService.createXML(pathAndTypeStr[0], data);
}
JOptionPane.showMessageDialog(null, "文件导出"
+ (createFileRs ? "成功" : "失败"), "提示",
JOptionPane.INFORMATION_MESSAGE);
}
说明：
调用处的数据转换不是重点，省略
代码留存，方便使用