Question

我有一个Web项目，从数据库中显示网格视图。 Arraylist名称是leadSchoolList。所以，我保留了一个按钮，当点击它时，它会在Struts动作类中运行一个方法（名为：-actionExportToExcel）。现在我可以将列表元素导出到excel。

但是我面临的问题是打开导出excel Sheet的窗口。因此在actionExportToExcel中调用另一个方法（名为：-open）。但我不知道我哪里错了，所以有人可以帮助我吗？

public String actionExportToExcel(){
    try {
        FileOutputStream fileOut = new FileOutputStream("D:/poi-test.xls");

     HSSFWorkbook wb = new HSSFWorkbook();
     HSSFSheet sheet = wb.createSheet("new sheet");


     leadSchoolList = leadSchoolService.getAllLeadSchool();
     for(int rowNum = 0; rowNum < leadSchoolList.size(); rowNum++){
         HSSFRow row = sheet.createRow(rowNum);

         //for(int colNum = 0; colNum < 5; colNum++ ){
             HSSFCell cell1 = row.createCell(0);
             LeadSchool leadSchool = leadSchoolList.get(rowNum);
             cell1.setCellValue(leadSchool.getLeadSchool_String_LSchool_ID());

             HSSFCell cell2 = row.createCell(1);
             cell2.setCellValue(leadSchool.getLeadSchool_String_Name());

             HSSFCell cell3 = row.createCell(2);
             cell3.setCellValue(leadSchool.getLeadSchool_String_Address());

             HSSFCell cell4 = row.createCell(3);
             cell4.setCellValue(leadSchool.getLeadSchool_String_Phone_No());

             HSSFCell cell5 = row.createCell(4);
             cell5.setCellValue(leadSchool.getLeadSchool_String_Remarks());
             System.out.println("Successfully exported to Excel");






     }
     try {
        wb.write(fileOut);

    // fileOut.flush();
     open(fileOut);
     //fileOut.close();
     } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    } catch (FileNotFoundException e) {
        addActionError("The process cannot access the file because it is being used by another process");
        e.printStackTrace();
    }

    return SUCCESS;
}

  private void open(FileOutputStream f) {

      String[] cmd = new String[4];
        try{
            cmd[0] = "cmd.exe";
            cmd[1] = "/C";
            cmd[2] = "start";
            cmd[3] = "D:/poi-test.xls";

            Runtime.getRuntime().exec(cmd);
            //Runtime.getRuntime().exec("cmd.exe /c start D:/poi-test.xls");
            System.out.print("file opened");
        }
        catch(Exception e){
            e.printStackTrace();
        }
 }

Answer 1

幸运的是我自己找到了解决方案。首先需要运行flush（）和close（）方法，然后运行第二个（命名：-open）方法。在open方法中，而不是R

Runtime.getRuntime().exec(cmd);

我把它扩展为两行： -

Runtime run = Runtime.getRuntime();
Run.exec(cmd);

多数民众赞成......：D

如何打开从java arraylist导出的excel文件

1 个答案: