Java Apache POI打开文件？

我有一个Java程序，可以编辑现有的excel文件并将其保存为新文件。但是，我也希望程序在结束时自动打开新创建的文件。有一个apache poi命令可以让我这样做吗？

看一看，由于您没有提供代码，我正在使用

让我们先创建Excel文件

HSSFWorkbook workbook = new HSSFWorkbook();
        HSSFSheet sheet = workbook.createSheet("Sample sheet");

    Map<String, Object[]> data = new HashMap<String, Object[]>();
    data.put("1", new Object[] { "Emp No.", "Name", "Salary" });
    data.put("2", new Object[] { 1d, "John", 1500000d });
    data.put("3", new Object[] { 2d, "Sam", 800000d });
    data.put("4", new Object[] { 3d, "Dean", 700000d });

    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(new File("D:\\new.xls"));
        workbook.write(out);
        out.close();
        System.out.println("Excel written successfully..");

        /** Opening Excel File From Java **/

        try {
            Desktop.getDesktop().open(new File("D:\\new.xls"));
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

如果Desktop.open（）不可用，则可以使用Windows文件关联：

 Process p =    Runtime.getRuntime()    .exec("rundll32
 url.dll,FileProtocolHandler " + "D:\\new.xls");

---

我不知道POI是否提供了这样的方法。但是，您可以使用使用命令提示符的简单java方法执行此操作，并使用

start

命令打开所需的文件

public static void openExcelFile(){
    try{    
        Runtime.getRuntime().exec("cmd /c start "+FilePath);
    }catch(IOException  e){  
        e.printStackTrace();  
    }
}

---

注意：

start

后面的空格是必填的。别忘了

你有没有写过打开文件的代码片段？？请共享。所谓“结束时自动打开新创建的文件”，您的意思是要启动Excel以打开新创建的文件吗？我想说的是，这只适用于Windows计算机。作为改进，命令可以作为参数传递；向上投票！

HSSFWorkbook workbook = new HSSFWorkbook();
        HSSFSheet sheet = workbook.createSheet("Sample sheet");

    Map<String, Object[]> data = new HashMap<String, Object[]>();
    data.put("1", new Object[] { "Emp No.", "Name", "Salary" });
    data.put("2", new Object[] { 1d, "John", 1500000d });
    data.put("3", new Object[] { 2d, "Sam", 800000d });
    data.put("4", new Object[] { 3d, "Dean", 700000d });

    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(new File("D:\\new.xls"));
        workbook.write(out);
        out.close();
        System.out.println("Excel written successfully..");

        /** Opening Excel File From Java **/

        try {
            Desktop.getDesktop().open(new File("D:\\new.xls"));
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }