java 中 excel生成並檔案下載儲存到本地
阿新 • • 發佈:2019-02-08
servlet類
package com.dragon.action;
import Java.io.IOException;
import java.io.OutputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
public class ExcelServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public ExcelServlet() {
super ();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// response.setContentType("text/html");
// PrintWriter out = response.getWriter();
// out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
// out.println("<HTML>");
// out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
// out.println(" <BODY>");
// out.print(" This is ");
// out.print(this.getClass());
// out.println(", using the GET method");
// out.println(" </BODY>");
// out.println("</HTML>");
// out.flush();
// out.close();
this.doPost(request, response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
response.setContentType("application/vnd.ms-excel");
OutputStream out = response.getOutputStream();
//報頭用於提供一個推薦的檔名,並強制瀏覽器顯示儲存對話方塊
//attachment表示以附件方式下載。如果要在頁面中開啟,則改為 inline
response.setHeader("Content-Disposition", "attachment; filename=TestExcel1.xls ");
//建立workbook工作薄
Workbook workbook = new HSSFWorkbook();
//建立工作表
Sheet sheet = workbook.createSheet("使用者資訊");
//建立第二個工作薄
Sheet sheet2 = workbook.createSheet();
//為工作薄起名字
workbook.setSheetName(1, "口袋裡的小龍");
//設定單元格樣式
HSSFCellStyle hssfCellStyle = (HSSFCellStyle) workbook.createCellStyle();
hssfCellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);//居中顯示
hssfCellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//縱向居中
//建立行
Row row = sheet.createRow(0);
//建立單元格
Cell cell = row.createCell(0);
//設定第一行第一格的值
cell.setCellValue("姓名");
//設定單元格的文字居中顯示
cell.setCellStyle(hssfCellStyle);
//建立單元格
Cell cell1 = row.createCell(1);
//設定第一行第一格的值
cell1.setCellValue("性別");
cell1.setCellStyle(hssfCellStyle);
//建立單元格
Cell cell2 = row.createCell(2);
//設定第一行第一格的值
cell2.setCellValue("年齡");
cell2.setCellStyle(hssfCellStyle);
//建立單元格
Cell cell3 = row.createCell(3);
//設定第一行第一格的值
cell3.setCellValue("家庭住址");
cell3.setCellStyle(hssfCellStyle);
for (int i = 1; i <= 5; i++) {
//建立行
Row rows = sheet.createRow(i);
//建立單元格
Cell cells = rows.createCell(0);
//設定第一行第一格的值
cells.setCellValue("張三"+i);
//建立單元格
Cell cell1s = rows.createCell(1);
//設定第一行第一格的值
cell1s.setCellValue("男");
//建立單元格
Cell cell2s = rows.createCell(2);
//設定第一行第一格的值
cell2s.setCellValue(18+i);
//建立單元格
Cell cell3s = rows.createCell(3);
//設定第一行第一格的值
cell3s.setCellValue("家庭住址"+i);
}
workbook.write(out);
System.out.println("資料寫入成功!");
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
index.jsp頁面
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="servlet/ExcelServlet" method="post">
<input type="submit" value="測試"></input>
</form>
</body>
</html>