使用poi操作导出excel代码示例

package pi3000.narris.servlet;

import java.io.IOException;

import java.io.OutputStream;

import java.sql.Timestamp;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Date;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;

import org.apache.poi.hssf.usermodel.HSSFDataFormat;

import org.apache.poi.hssf.usermodel.HSSFFont;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

/***

* 通过AJAX示例,导出EXCEL示例：

* JAVA中采用HSSFWorkbook创建EXCEL表格,设置输出格式输出

* @author huawei

*

*/

public class ExportExcelServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

protected void service(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

String method = request.getParameter("method");

if("prestartExcel".equals(method)){

prestartExcel(request, response);

}else if("downloadExcel".equals(method)){

downloadExcel(request, response);

}

}

private void prestartExcel(HttpServletRequest request, HttpServletResponse response) {

//产生的Excel文件的名称

//产生工作簿对象

HSSFWorkbook workbook = new HSSFWorkbook();

//产生工作表对象

HSSFSheet sheet = workbook.createSheet();

//创建生成EXCEL头部

List<String> lists = getExcelHeader();

createExcelHeader(workbook, sheet, lists);//sheet表、单元格样式、数据集合

//创建生成EXCEL实体数据

Map<String, List<Object>> maps = getExcelBody();

createExcelBody(workbook, sheet, maps);//sheet表、body的数据集合

HttpSession session = request.getSession();

session.setAttribute("excel", workbook);

}

private void createExcelHeader(HSSFWorkbook workbook, HSSFSheet sheet, List<String> lists) {

//设置第一个工作表的名称为firstSheet

workbook.setSheetName(0,"自动化设备检修");

sheet.setDefaultColumnWidth(15);//设置默认每一列的宽度

//sheet.setDefaultRowHeight((short) (20 * 20));//设置默认每一行的行高

//产生第二个工作表对象 HSSFSheet sheet2 = workbook.createSheet();

//设置第二个工作表的名称为secondSheet workbook.setSheetName(1,"自动化设备检修2");

//设置单元格样式：可以对字体、前景色、背景色等设置，参考POI的API

HSSFCellStyle cellStyle = workbook.createCellStyle();

HSSFFont font = workbook.createFont();

font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//设置粗体

cellStyle.setFont(font);

HSSFRow row = sheet.createRow(0);

HSSFCell cell = null;

for(int i = 0;i < lists.size();i++){

cell = row.createCell(i);

cell.setCellValue(lists.get(i));

cell.setCellStyle(cellStyle);

}

}

private void createExcelBody(HSSFWorkbook workbook, HSSFSheet sheet, Map<String, List<Object>> maps) {

//定义单元格样式

HSSFCellStyle cellStyle = workbook.createCellStyle();

HSSFDataFormat dataFormat = workbook.createDataFormat();

cellStyle.setDataFormat(dataFormat.getFormat("yyyy-mm-dd hh:mm"));//时间格式

cellStyle.setAlignment(HSSFCellStyle.ALIGN_LEFT);//对齐方式

HSSFRow row;

HSSFCell cell;

int rows = maps.keySet().size();

List<Object> bodylist = null;

int index = 0;

for(int i = 0;i < rows;i++){

bodylist = maps.get(String.valueOf(i));

if(bodylist != null){

row = sheet.createRow(++index);

for(int j = 0;j < bodylist.size();j++){

cell = row.createCell(j);

Object data = bodylist.get(j) == null? "" : bodylist.get(j);

if(data != null && "java.sql.Timestamp".equals(data.getClass().getName())){//判断如果为时间格式则：

Date date = new Date(((Timestamp)data).getTime());

cell.setCellValue(date);

cell.setCellStyle(cellStyle);

}else{//如果为null、string则：

cell.setCellValue(data.toString());

}

}

}

}

}

/***

* 从SESSION中取出EXCEL

* @param request

* @param response

* @throws IOException

*/

private void downloadExcel(HttpServletRequest request, HttpServletResponse response) throws IOException{

String filename = "自动化系统设备检修流程";

HttpSession session = request.getSession();

HSSFWorkbook workbook = (HSSFWorkbook)session.getAttribute("excel");

OutputStream out = response.getOutputStream();// 取得输出流

response.reset();// 清空输出流

response.setCharacterEncoding("UTF-8");

//设置返回的头字段:http协议inline采用浏览器方式打开、attachment采用本地EXCEL方式打开

response.setHeader("Content-disposition", "inline;filename = " + java.net.URLEncoder.encode(filename, "UTF-8") + ".xls");

//response.setHeader("Content-disposition", "attachment;filename = " + java.net.URLEncoder.encode(filename, "UTF-8") + ".xls");

response.setContentType("application/vnd.ms-excel;charset=UTF-8");//定义输出类型

workbook.write(out);

out.flush();

out.close();

}

/***

* 准备导出EXCEL的头部数据

* @return

*/

private List<String> getExcelHeader(){

List<String> lists = new ArrayList<String>();

lists.add("申请单号");lists.add("单位名称");

lists.add("设备名称");lists.add("所属系统名称");

lists.add("电压等级");lists.add("紧急程度");

lists.add("维护内容");lists.add("处理日期");

return lists;

}

/***

* 准备导出EXCEL的实体数据

* @return

*/

private Map<String, List<Object>> getExcelBody(){

Map<String, List<Object>> maps = new HashMap<String, List<Object>>();

Date date = new Date();//模拟日期数据

Timestamp timestamp = Timestamp.valueOf(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date));

Object[][] tabledate =

{

{"ZDH_001","变电站1","110kV设备","系统1","220kV","一般","nr_1",timestamp},

{"ZDH_002","变电站2","111kV设备","系统2","330kV","紧急","nr_2",timestamp},

{"ZDH_003","变电站3","112kV设备","系统3","440kV","紧急","nr_3",timestamp},

{"ZDH_004","变电站4","113kV设备","系统4","550kV","一般","nr_4",timestamp},

{"ZDH_006","变电站5","114kV设备","系统5","660kV","紧急","nr_5",timestamp},

{"ZDH_007","变电站6","115kV设备","系统6","770kV","一般","nr_6",timestamp},

{"ZDH_008","变电站7","116kV设备","系统7","880kV","紧急","nr_7",null},

{"ZDH_009","变电站8","117kV设备","系统8","990kV","一般","nr_8",timestamp}

};

Object[] contents = null;

List<Object> lists = null;

for(int i = 0;i < tabledate.length;i++){//循环行数

contents = tabledate[i];

lists = new ArrayList<Object>();

for(int j = 0;j < contents.length;j++){//循环列数

lists.add(contents[j]);

}

System.out.print("index: " + i + " ");

maps.put(String.valueOf(i), lists);//存放：行号、该行记录内容

}

System.out.println();

return maps;

}

}

//下面是导出excel的jsp示例，包含浏览器判断的代码

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html version="-//W3C//DTD HTML 4.01 Transitional//EN">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<script type="text/javascript" language="utf-8" src="../javascript/jquery-1.4.3.js"></script>

<script type="text/javascript" language="utf-8" src="../javascript/jquery.form.js"></script>

<title>文件下载</title>

</head>

<script type="text/javascript">

$(function(){

/**

判断浏览器类型和版本信息，如果真的IE浏览器可以直接调用下面的另一种简便方式判断

var Sys = {};

var ua = navigator.userAgent.toLowerCase();

var s;

(s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :

(s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :

(s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :

(s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :

(s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;

//以下进行测试

if (Sys.ie) document.write('IE: ' + Sys.ie);

if (Sys.firefox) document.write('Firefox: ' + Sys.firefox);

if (Sys.chrome) document.write('Chrome: ' + Sys.chrome);

if (Sys.opera) document.write('Opera: ' + Sys.opera);

if (Sys.safari) document.write('Safari: ' + Sys.safari);

*/

$("#button").click(function(){

$.ajax({

type: "POST",

//async:true,

data: "method=prestartExcel",

url: "/web/ExportExcelServlet",

success: function(e){

if(navigator.userAgent.indexOf("MSIE 9.0")>0){//其实不需要判断，此处是为了测试调用的效果

window.open("/web/ExportExcelServlet?method=downloadExcel","_blank");

///window.location = "/web/ExportExcelServlet?method=downloadExcel";

}

},

error: function(e){

alert('下载失败');

}

});

});

$("#submit").submit(function(){

var filename = $("#file").val();

if(filename != null && filename != ""){

var endswith = filename.substring(filename.length - 4, filename.length);

if(".xls" == endswith){

return true;

}else{

alert("上传文件类型不符合规范,仅限于excel类型文件格式");

}

}

return false;

});

});

</script>

<body>

<input type="button" value="导出EXCEL" id="button"/>

<br/>

hello,work,hello,work,fuck,hello,good,ok

<form enctype="multipart/form-data" id="form" action="../excelOperate?sheet=2" method="post">

上传附件：<input type="file" id="file" name="file"/>

<input type="submit" id="submit" value="上传附件"/>

</form>

</body>

</html>