如何使用jsp servlet生成和下载Excel报告
问题描述：
我已经使用Apache POI生成了Excel报告。我现在想要的，我想发送到浏览器下载。我的JSP如下。如何使用jsp servlet生成和下载Excel报告
<html>
<head><title> Excel Generator</title>
</head>
<body>
<a href="../houseHoldReportGenCtr">generate report</a>
</body>
</html>这里是我的servlet代码
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String report_path=request.getSession().getServletContext().getInitParameter("REPORT_PATH");
HouseHoldReportGenerator report = new HouseHoldReportGenerator("HOUSE_HOLD",attrStr_,dbParam);
report.Write_Report___(report_path, dbParam);
System.out.println("path-->"+report_path+report.getFileName_());}
我有我的报告生成Java类HouseHoldReportGenerator。它生成报告。但是，我想从一个点击jsp页面中的链接，我希望它被生成和下载。我也可以得到报告的目的地。
答
流的文件给客户端，你应该添加在你的servlet方法如下..
try{
//This is for downloading
response.setContentType("application/octet-stream");
response.setHeader("Content-Disposition", "attachment;filename=nameOfExcel");
File file = new File("path_to_the_file/excelfile.xls"); //<- the name of excel that you have already created.
FileInputStream fileIn = new FileInputStream(file);
ServletOutputStream out = response.getOutputStream();
byte[] outputByte = new byte[4096];
//copy binary contect to output stream
while(fileIn.read(outputByte, 0, 4096) != -1)
{
out.write(outputByte, 0, 4096);
}
fileIn.close();
out.flush();
out.close();
}
catch(IOException e){
e.printStackTrace();
}