java、jsp導出excel功能備份
問題踩坑：
ajax請求不能下載文件
必須這樣：
<a href="/media">點擊下載Excel</a>
或者
location.href = ‘/media‘;
js取表單數據：
var selectbatch = $("selectbatch").value
java代碼：
package com.action;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import com.IHttpAction;
import com.sql.ExchangeSql;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.NumberFormats;
import jxl.write.WritableCell;
import jxl.write.WritableCellFormat;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;
/**
* @FileName: ExchangeSelectAction.java
* @Description:
* @Author : xingchong
* @CreateTime: Nov 15, 2018 8:42:45 PM
* @Copyright: Copyright (c) 2017
* @Version: 1.0
*/
public class ExchangeExportAction implements IHttpAction {
private ExchangeSql exchangeSql = new ExchangeSql();
private Logger logger = Logger.getLogger(ExchangeExportAction.class);
/* (non-Javadoc)
* @see com.gm.console.IHttpAction#action(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
@Override
public void action(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
int batch = Integer.parseInt(request.getParameter("selectbatch"));
logger.info("selectbatch = "+ batch);
try {
InputStream is = this.exportExchangeCode(batch);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
String fileName = "batch_"+batch+"_"+sdf.format(new Date()) + ".xls";
response.setContentType("applicaiton/x-download");
response.addHeader("Content-Disposition", "attachment;filename="+fileName);
ServletOutputStream out=response.getOutputStream();
int len=0;
byte[] buffer=new byte[1024];
while((len=is.read(buffer))>0){
out.write(buffer,0,len);
}
is.close();
out.close();
// response.getWriter().write("<span>export excel ok...</span>");
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 獲取兌換碼html信息
*
* @param batch
* @return
* @throws Exception
*/
private InputStream exportExchangeCode(int batch) throws Exception {
List<List<String>> dataList = null;
if (batch > 0) {
dataList = this.exchangeSql.getExchangeData(batch, Integer.MAX_VALUE);
} else {
dataList = this.exchangeSql.getSimpleExchangeData(Integer.MAX_VALUE);
}
List<String> titleList = dataList.get(0);
dataList.remove(0);
InputStream is = null;
try {
ByteArrayOutputStream os = new ByteArrayOutputStream();
WritableWorkbook wwb = Workbook.createWorkbook(os);
int step = 50000;
int size = dataList.size();
int sheetIndex = 0;
for(int start = 0; start < size; start+=step){
int end = start + step;
end = end > size? size:end;
List<List<String>> dataListSub = new ArrayList<List<String>>();
dataListSub.add(titleList);
dataListSub.addAll(dataList.subList(start, end));
this.writeDataToSheet(wwb, dataListSub, sheetIndex++);
}
wwb.write();
wwb.close();
is = new ByteArrayInputStream(os.toByteArray());
} catch (IOException e) {
e.printStackTrace();
} catch (WriteException e) {
e.printStackTrace();
}
return is;
}
/**
* 寫一頁excel
* @param wwb
* @param dataList
* @param sheetIndex
* @throws RowsExceededException
* @throws WriteException
*/
private void writeDataToSheet(WritableWorkbook wwb, List<List<String>> dataList, int sheetIndex)
throws RowsExceededException, WriteException {
WritableSheet sheet = wwb.createSheet("data_"+sheetIndex, sheetIndex);
WritableCellFormat wcf = new WritableCellFormat(NumberFormats.TEXT);
for (int r = 0; r < dataList.size(); r++) {
List<String> list = dataList.get(r);
for (int c = 0; c < list.size(); c++) {
String string = list.get(c);
WritableCell writableCell = new Label(c, r, string, wcf);
sheet.addCell(writableCell);
}
}
}
}
jsp代碼：
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>My JSP ‘buildinglist.jsp‘ starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="Content-type" content="text/html charset=utf-8">
<meta http-equiv="expires" content="0">
<LINK href="/console/style/default.css" type=text/css rel=stylesheet>
<LINK href="/console/style/style.css" type=text/css rel=stylesheet>
<LINK href="/console/style/style3.css" type=text/css rel=stylesheet>
<LINK href="/console/style/tab.webfx.css" type=text/css rel=StyleSheet>
<link href="/console/style/calendar.css" type=text/css rel=StyleSheet>
<script type="text/javascript" src="/console/js/prototype.js"></script>
<script type="text/javascript" src="/console/js/tools.js"></script>
<script type="text/javascript" src="/console/js/calendar.js"
charset="utf-8"></script>
<script type="text/javascript" src="/console/js/swfobject.js"
charset="utf-8"></script>
<script type="text/javascript">
function btnAjax() {
$("resultTable").innerHTML = "<span style=\"color: red;\">正在緊張生成中...請勿重復點擊...</span>";
var myAjax = new Ajax.Request("customRequest.htm?catalog=exchange_add",
{
method : ‘post‘,
parameters : Form.serialize(‘Form1‘),
onComplete : function(x) { //提交成功回調
$("resultTable").innerHTML = x.responseText;
},
onError : function(x) { //提交失敗回調
alert(x.statusText);
}
});
}
function selectAjax() {
$("selectTable").innerHTML = "<span style=\"color: green;\">正在查詢中...請稍等...</span>";
var myAjax = new Ajax.Request(
"customRequest.htm?catalog=exchange_select", {
method : ‘post‘,
parameters : Form.serialize(‘Form1‘),
onComplete : function(x) { //提交成功回調
$("selectTable").innerHTML = x.responseText;
},
onError : function(x) { //提交失敗回調
alert(x.statusText);
}
});
}
//export excel
function exportExcel() {
var selectbatch = $("selectbatch").value
location.href = ‘/customRequest.htm?catalog=exchange_export&selectbatch=‘+selectbatch;
}
</script>
<style type="text/css">
</style>
</HEAD>
<body>
<form id="Form1" name="Form1" method="post">
<div style="clear: both; height: 1px; overflow: hidden"></div>
<div width="98%" align="left" valign="left">
<font size="6px"> <br>兌換碼生成 <br>
<br>
</font> ${result}
</div>
<table align="left" class=detail>
<tbody>
<tr>
<td class="list_td01">類型</td>
<td><select name="codeType">
<option value="1">單人單次</option>
<option value="0">多人共享單次</option>
</select> <span style="color: red;">1-單人單次 0-多人單次</span></td>
<td class=list_td01>生成數量</td>
<td class=list_td02><select name="num">
<option value="10">10</option>
<option value="100">100</option>
<option value="1000">1000</option>
<option value="10000">10000</option>
<option value="100000">100000</option>
</select></td>
</tr>
<tr align="left">
<td class="list_td01">開始時間</td>
<td class="list_td02"><input type="text"
onclick="displayCalendar(this,‘yyyy-mm-dd hh:ii:00‘,this,true);"
class="datetime" id="startTime" name="startTime"> <span
style="color: red;">(必須)</span></td>
<td class="list_td01">結束時間</td>
<td class="list_td02"><input type="text"
onclick="displayCalendar(this,‘yyyy-mm-dd hh:ii:00‘,this,true);"
class="datetime" id="endTime" name="endTime"> <span
style="color: red;">(必須)</span></td>
</tr>
<tr>
<td class=list_td01>獎勵Json</td>
<td class=list_td02 colspan="3"><input type="text" size=90
name="rewardJson" id="rewardJson" value=""> <span
style="color: red;">(必須)</span></td>
</tr>
<tr>
<td class=list_td01>等級限制</td>
<td class=list_td02 colspan="1"><select name="level">
<option value="1">1級</option>
<option value="10">10級</option>
<option value="20">20級</option>
<option value="30">30級</option>
<option value="40">40級</option>
<option value="50">50級</option>
<option value="60">60級</option>
<option value="70">70級</option>
<option value="80">80級</option>
<option value="90">90級</option>
<option value="100">100級</option>
<option value="110">110級</option>
<option value="120">120級</option>
</select></td>
<td class=list_td01>生成批次</td>
<td class=list_td02 colspan="1"><input type="text" size=20
name="batch" id="batch" value="1"> <span
style="color: red;">(必須)</span></td>
</tr>
<tr>
<td align="left"><input type="button" class="butcom"
onclick="btnAjax()" value=" 生成提交 " /></td>
</tr>
</table>
<TABLE id="resultTable" align="left" class=common></TABLE>
<!-- select about -->
<table align="left" class=detail>
<tr>
<td class=list_td01>批次 </td>
<td class=list_td02><input type="text" size=10 name="selectbatch"
id="selectbatch" value="0"> <span
style="color: green;">(0表求所有批次)</span></td>
<td align="left"><input type="button" class="butcom"
onclick="selectAjax()" value=" 查詢 " /></td>
<td align="left"><input type="button" class="butcom"
onclick="exportExcel()" value=" 導出excel " /></td>
</tr>
</table>
<TABLE id="selectTable" align="left" class=common></TABLE>
</form>
</body>
</HTML>
java、jsp導出excel功能備份