1 
HSSFWorkbook hwb=new HSSFWorkbook();
HSSFSheet sheet =  hwb.createSheet(seldate+"|"+seldate2);

HSSFRow rowhead=   sheet.createRow((short)0);
rowhead.createCell((short) 0).setCellValue("NUMBER");
rowhead.createCell((short) 1).setCellValue("EMPLOYEE NAME");
rowhead.createCell((short) 2).setCellValue("ITEM QUANTITY");
rowhead.createCell((short) 3).setCellValue("AMOUNT PAID");
//rowhead.createCell((short) 4).setCellValue("");

String sql="something";

ResultSet rs=st.executeQuery(sql);
ResultSetMetaData rsmd=null;
rsmd=rs.getMetaData();
int colcnt=rsmd.getColumnCount();
int i=1;
double grandTotal = 0.0;
while(rs.next())
{
/*----*/
String [] dot=new String[colcnt];

//System.out.println("\n record count for data :"+(++tr));

for (int jk=1;jk<=colcnt;jk++)
    {
    dot[jk-1]=rs.getString( jk);

    }
al.add(dot);
}
String pot []=null;
//HSSFRow row=   sheet.createRow((short)i);
for(int mn=0;mn<al.size();mn++)
{
    pot=(String[])al.get(mn);

    String number=pot[0];
    String empname=pot[1];
    String itemqty=pot[2];
    String emprate=pot[3];

    double Rate=Double.parseDouble(emprate);
    //out.println(Rate);
    int Qty=Integer.parseInt(itemqty);
    //out.println(Rate);
    totAmt=(Rate)*(Qty);
    grandTotal += totAmt;

/*----*/
HSSFRow row=   sheet.createRow((short)i);
//row.createCell((short) 0).setCellValue(Integer.toString(rs.getInt("BID")));
row.createCell((short) 0).setCellValue(number);
row.createCell((short) 1).setCellValue(empname);
row.createCell((short) 2).setCellValue(itemqty);
row.createCell((short) 3).setCellValue(totAmt);
//row.createCell((short) 4).setCellValue(rs.getString(""));

i++;
//row.createCell((short)3).setCellValue("12345");
}
/*--------------------------*/
HSSFRow row1=sheet.createRow((short)i);
row1.createCell((short) 2).setCellValue("Grand Total");
row1.createCell((short) 3).setCellValue(grandTotal);


/*---------------------------*/
FileOutputStream fileOut =  new FileOutputStream(filename);
hwb.write(fileOut);
fileOut.close();
//out.println("<script>win=window.open('ExcelMsg.jsp','popup','toolbar=no,status=no,height=300,width=800');</script>");

上記のコードを実行すると、クライアント側に保存されたExcelファイルが生成され、「レポート」という名前のディレクトリの「D」ドライブに直接保存されます。これをユーザーの選択によって実現したいということは、ファイル ダイアログ ボックス (保存ダイアログ ボックス) を開いて、ユーザーが Excel ファイルを保存する場所を指定できるようにする必要があることを意味します。これはどのように行うことができますか？

更新されたコード

<%
ArrayList al=new ArrayList();
int tr=0;
double totAmt=0.0;


try
{
String seldate=request.getParameter("Sdate");
out.println("\n selected date : :"+seldate);
String seldate2=request.getParameter("Sdate2");
out.println("\n selected date 2 : :"+seldate2);


String str_date=seldate2;
SimpleDateFormat formatter ; 
Date date =new Date() ; 
Calendar cal2=Calendar.getInstance();
formatter = new SimpleDateFormat("dd-MMM-yyyy");
//date = (Date)formatter.parse(str_date);
cal2.setTime(formatter.parse(str_date));
cal2.add(Calendar.DATE,1);
str_date=formatter.format(cal2.getTime());
out.println("\n Today is " +str_date );

Calendar cal = new GregorianCalendar();
String name=cal.get(Calendar.DATE) +"-" +(cal.get(Calendar.MONTH)+1) + "-"+cal.get(Calendar.YEAR);

/*-------------------------------------------------------------------------------------------------*/
System.out.println("1");
String fileStoreURL="";
String rootpath="D:";
fileStoreURL =rootpath+"/Report";
System.out.println("2");
try {
    File f = new File(fileStoreURL);
    if (!f.exists())
    {
    f.mkdirs();
    }
    } 
    catch (Exception e)
        {

        }
System.out.println("3");
String filename=fileStoreURL+"/"+name+".xls" ;
//String filename=name+".xls" ;
System.out.println("4");
/*-------------------------------------------------------------------------------------------------*/
System.out.println("5");
        HSSFWorkbook hwb=new HSSFWorkbook();
        HSSFSheet sheet =  hwb.createSheet(seldate+"|"+seldate2);

        HSSFRow rowhead=   sheet.createRow((short)0);
        rowhead.createCell((short) 0).setCellValue("NUMBER");
        rowhead.createCell((short) 1).setCellValue("EMPLOYEE NAME");
        rowhead.createCell((short) 2).setCellValue("ITEM QUANTITY");
        rowhead.createCell((short) 3).setCellValue("AMOUNT PAID");
        //rowhead.createCell((short) 4).setCellValue("");

        String sql="something";

        ResultSet rs=st.executeQuery(sql);
        ResultSetMetaData rsmd=null;
        rsmd=rs.getMetaData();
        int colcnt=rsmd.getColumnCount();
        int i=1;
        double grandTotal = 0.0;
        while(rs.next())
        {
        /*----*/
        String [] dot=new String[colcnt];

        //System.out.println("\n record count for data :"+(++tr));

        for (int jk=1;jk<=colcnt;jk++)
            {
            dot[jk-1]=rs.getString( jk);

            }
        al.add(dot);
        }
        String pot []=null;
        //HSSFRow row=   sheet.createRow((short)i);
        for(int mn=0;mn<al.size();mn++)
        {
            pot=(String[])al.get(mn);

            String number=pot[0];
            String empname=pot[1];
            String itemqty=pot[2];
            String emprate=pot[3];

            double Rate=Double.parseDouble(emprate);
            //out.println(Rate);
            int Qty=Integer.parseInt(itemqty);
            //out.println(Rate);
            totAmt=(Rate)*(Qty);
            grandTotal += totAmt;

        /*----*/
        HSSFRow row=   sheet.createRow((short)i);
        //row.createCell((short) 0).setCellValue(Integer.toString(rs.getInt("BID")));
        row.createCell((short) 0).setCellValue(number);
        row.createCell((short) 1).setCellValue(empname);
        row.createCell((short) 2).setCellValue(itemqty);
        row.createCell((short) 3).setCellValue(totAmt);
        //row.createCell((short) 4).setCellValue(rs.getString(""));

        i++;
        //row.createCell((short)3).setCellValue("12345");
        }
        /*--------------------------*/
        HSSFRow row1=sheet.createRow((short)i);
        row1.createCell((short) 2).setCellValue("Grand Total");
        row1.createCell((short) 3).setCellValue(grandTotal);


        /*---------------------------*/

    response.setHeader("Content-Length", String.valueOf(filename.length())); response.setHeader("Content-Disposition", "attachment; filename=\"" + filename + "\"");  
    InputStream input = new BufferedInputStream(new FileInputStream(filename), 1024 * 10); 
    OutputStream output = new BufferedOutputStream(response.getOutputStream(), 1024 * 10);  
    byte[] buffer = new byte[1024 * 10]; 
    int length; 
    while ((length = input.read(buffer)) > 0) 
        {     
        output.write(buffer, 0, length); 
        }  
        output.flush(); 
        output.close(); 
        input.close();

エラー：

java.io.FileNotFoundException: 1-8-2012.xls (The system cannot find the file spe
cified)
java.io.FileNotFoundException: 1-8-2012.xls (The system cannot find the file spe
cified)
        at java.io.FileInputStream.open(Native Method)
        at java.io.FileInputStream.<init>(Unknown Source)
        at java.io.FileInputStream.<init>(Unknown Source)
        at org.apache.jsp.sapep.elrservices.processor.ExcelReport2_jsp._jspServi
ce(ExcelReport2_jsp.java:238)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:377)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
13)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:298)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:857)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ss(Http11Protocol.java:588)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:48
9)
        at java.lang.Thread.run(Unknown Source)
4

2 に答える 2

1

Fileの内容をに書き込む必要があり、それに加えて、応答のandServletOutputStreamを設定する必要があります。content-lengthcontent-disposition

簡単な例を次に示します。

response.setHeader("Content-Length", String.valueOf(file.length()));
response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");

InputStream input = new BufferedInputStream(new FileInputStream(file), 1024 * 10);
OutputStream output = new BufferedOutputStream(response.getOutputStream(), 1024 * 10);

byte[] buffer = new byte[1024 * 10];
int length;
while ((length = input.read(buffer)) > 0) {
    output.write(buffer, 0, length);
}

output.flush();
output.close();
input.close();

明らかに、適切な例外処理コードも追加する必要があります。

于 2012-08-01T11:59:30.943 に答える