网上有各种的版本，但是还是自己来总结一下
1.首先是引入jxl的jar包jxl-2.6.10.jar
2.在jsp页面先，这个是跟查询一起的，也就是能够按照搜索条件的不同导出的数据也不同
<input type="button" id="searchBut" class="g_btn" value="导出" onclick="$('#export').val('1');validate();"/>
<input type="button" id="searchBut" class="g_btn" value="查询" onclick="$('#export').val('');validate();"/>
<input type="hidden" name="export" id="export" value=""/>也就是export的值为1
根据struts2的上传下载操作，需要在struts.xml中配置
<result name="excel" type="stream">
<param name="contentType">application/vnd.ms-excel</param>
<param name="inputName">excelStream</param>
<param name="contentDisposition">attachment;filename=${filename}</param>
<param name="bufferSize">1024</param>
</result>
Action中的处理
private String export;
private InputStream excelStream;
private String filename;
//get set
public String getExport() {
return export;
}
public void setExport(String export) {
this.export = export;
}
public InputStream getExcelStream() {
//将OutputStream转化为InputStream
ByteArrayOutputStream out = new ByteArrayOutputStream();
export(out);
return new ByteArrayInputStream(out.toByteArray());
}
public void setExcelStream(InputStream excelStream) {
this.excelStream = excelStream;
}
public String getFilename() {
return filename;
}
public void setFilename(String filename) {
this.filename = filename;
}
public String queryCharge() {
if("1".equals(export)){
excelStream=getExcelStream();
return "excel";
}else{
return xxx;
}
/**
* 导出excel文件
* @throws Exception
*/
public void export(OutputStream out){
try {
//创建工作薄
WritableWorkbook wwb = Workbook.createWorkbook(out);
//创建sheet
WritableSheet ws = wwb.createSheet("45充值记录", 0);
WritableSheet ws2 = wwb.createSheet("60充值记录", 1);
WritableSheet ws3 = wwb.createSheet("108充值记录", 2);
WritableSheet ws4 = wwb.createSheet("其他充值记录", 3);
//给sheet电子版中所有的列设置默认的列的宽度;
ws.getSettings().setDefaultColumnWidth(20);
ws2.getSettings().setDefaultColumnWidth(20);
ws3.getSettings().setDefaultColumnWidth(20);
ws4.getSettings().setDefaultColumnWidth(20);
//45的
String [] str = {"编号","充值类型","充值日期","45充值笔数","任意金额充值总笔数","45充值占当日总充值数百分比"};//标题内容
ws.addCell(new jxl.write.Label(0,0, "45充值记录表"));
//60de
String [] str2 = {"编号","充值类型","充值日期","60充值笔数","任意金额充值总笔数","60充值占当日总充值数百分比"};//标题内容
ws2.addCell(new jxl.write.Label(0,0,"60充值记录表"));
//108de
String [] str3 = {"编号","充值类型","充值日期","108充值笔数","任意金额充值总笔数","108充值占当日总充值数百分比"};//标题内容
ws3.addCell(new jxl.write.Label(0,0, "108充值记录表"));
//其他的
String [] str4 = {"编号","充值类型","充值日期","其他充值笔数","任意金额充值总笔数","其他充值占当日总充值数百分比"};//标题内容
ws4.addCell(new jxl.write.Label(0,0, "其他充值记录表"));
List<Map<String, String>> chargeExcelList = manageFundService.queryChargeExcel(reqPara);
LinkedList<Map<String, String>> list45=new LinkedList<Map<String, String>>();
LinkedList<Map<String, String>> list60=new LinkedList<Map<String, String>>();
LinkedList<Map<String, String>> list108=new LinkedList<Map<String, String>>();
LinkedList<Map<String, String>> listOther=new LinkedList<Map<String, String>>();
for (Map<String, String> map : chargeExcelList) {
if("45".equals(map.get("kind"))){
list45.add(map);
}else if("60".equals(map.get("kind"))){
list60.add(map);
}else if("108".equals(map.get("kind"))){
list108.add(map);
}else if("其他".equals(map.get("kind"))){
listOther.add(map);
}
}
addCellList(list45,ws,str);
addCellList(list60,ws2,str2);
addCellList(list108,ws3,str3);
addCellList(listOther,ws4,str4);
filename=new String("充值记录.xls".getBytes(),"ISO8859-1");
wwb.write();
wwb.close();
out.flush();
out.close();
} catch (Exception e) {
System.out.println("Error!");
e.printStackTrace();
}
}
/**
* 循环添加sheet中的行列
* @param list
* @param ws
*/
public void addCellList(List<Map<String, String>> list, WritableSheet ws,String[] title){
//添加标题
try {
for (int m = 0; m < title.length; m++) {
/**
* Label(i,j,String);lable是标题，cell是单元格
* i:列
* j:行
* String:表示内容
*/
ws.addCell(new Label(m, 1, title[m]));
}
int i=1;
for (int j = 0; j < list.size(); j++) {
Map<String, String> map= list.get(j);
if(map!=null && map.size()>0){
// 这里设置是自增的序号而不是ID号.也可以改成ID号ws.addCell(new jxl.write.Label(1, i + 1, ""+ map.get("id")));
ws.addCell(new jxl.write.Number(0, i + 1, i));
ws.addCell(new Label(1, i + 1,map.get("kind")));
ws.addCell(new Label(2, i + 1,map.get("chargeDay")));
ws.addCell(new Label(3, i + 1,map.get("thiscnt")));
ws.addCell(new Label(4, i + 1,map.get("totalCnt")));
ws.addCell(new Label(5, i + 1,map.get("percentage")));
i++;
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
dao中主要处理的是数据处理的数据，主要是使用native sql写的联合查询，主要查出不同的充值数据
public List<Map<String, String>> queryChargeExcel(FundModel reqPara) {
List<Map<String, String>> data = new ArrayList<Map<String, String>>();
Session session = null;
try {
session = sessionFactory.openSession();
StringBuilder sb = new StringBuilder();
sb.append("SELECT temp.* FROM(");
sb.append("SELECT 45 AS kind,a.cnt thiscnt,b.cnt totalCnt, ROUND(a.cnt/b.cnt*100,2) AS percentage,a.chargeDay FROM( ");
sb.append("(SELECT COUNT(1) cnt, DATE_FORMAT(charge_time, '%Y-%m-%d') chargeDay ");
sb.append("FROM t_user_charge ");
sb.append("WHERE pay_status=1 AND money = 45 ");
sb.append("GROUP BY chargeDay ");
sb.append(") a,");
sb.append("(SELECT COUNT(1) cnt, DATE_FORMAT(charge_time, '%Y-%m-%d') chargeDay ");
sb.append("FROM t_user_charge ");
sb.append("WHERE pay_status=1 ");
sb.append("GROUP BY chargeDay ");
sb.append(") b");
sb.append(")");
sb.append("WHERE a.chargeDay = b.chargeDay ");
sb.append("UNION ALL ");
sb.append("SELECT 60,a.cnt thiscnt,b.cnt totalCnt,ROUND(a.cnt/b.cnt*100,2) AS percentage,a.chargeDay FROM( ");
sb.append("(SELECT COUNT(1) cnt, DATE_FORMAT(charge_time, '%Y-%m-%d') chargeDay ");
sb.append("FROM t_user_charge ");
sb.append("WHERE pay_status=1 AND money = 60 ");
sb.append("GROUP BY chargeDay ");
sb.append(") a,");
sb.append("(SELECT COUNT(1) cnt, DATE_FORMAT(charge_time, '%Y-%m-%d') chargeDay ");
sb.append("FROM t_user_charge ");
sb.append("WHERE pay_status=1 ");
sb.append("GROUP BY chargeDay ");
sb.append(") b");
sb.append(")");
sb.append("WHERE a.chargeDay = b.chargeDay ");
sb.append("UNION ALL ");
sb.append("SELECT 108,a.cnt thiscnt,b.cnt totalCnt, ROUND(a.cnt/b.cnt*100,2) AS percentage,a.chargeDay FROM( ");
sb.append("(SELECT COUNT(1) cnt, DATE_FORMAT(charge_time, '%Y-%m-%d') chargeDay ");
sb.append("FROM t_user_charge ");
sb.append("WHERE pay_status=1 AND money = 108 ");
sb.append("GROUP BY chargeDay ");
sb.append(") a,");
sb.append("(SELECT COUNT(1) cnt, DATE_FORMAT(charge_time, '%Y-%m-%d') chargeDay ");
sb.append("FROM t_user_charge ");
sb.append("WHERE pay_status=1 ");
sb.append("GROUP BY chargeDay ");
sb.append(") b");
sb.append(")");
sb.append("WHERE a.chargeDay = b.chargeDay ");
sb.append(" UNION ALL");
sb.append(" SELECT '其他',a.cnt thiscnt,b.cnt totalCnt, ROUND(a.cnt/b.cnt*100,2) AS percentage,a.chargeDay FROM(");
sb.append(" (SELECT COUNT(1) cnt, DATE_FORMAT(charge_time, '%Y-%m-%d') chargeDay");
sb.append(" FROM t_user_charge");
sb.append(" WHERE pay_status=1 AND money NOT IN(45,60,108)");
sb.append(" GROUP BY chargeDay");
sb.append(" ) a,");
sb.append(" (SELECT COUNT(1) cnt, DATE_FORMAT(charge_time, '%Y-%m-%d') chargeDay");
sb.append(" FROM t_user_charge");
sb.append(" WHERE pay_status=1");
sb.append(" GROUP BY chargeDay");
sb.append(" ) b");
sb.append(" )");
sb.append(" WHERE a.chargeDay = b.chargeDay");
sb.append(" ) AS temp");
sb.append(" WHERE 1=1");
if (StringUtil.isNotEmpty(reqPara.getBeginTime())) {
sb.append(" and chargeDay>=:beginTime");
}
if (StringUtil.isNotEmpty(reqPara.getEndTime())) {
sb.append(" and chargeDay<:endTime");
}
Query query = session.createSQLQuery(sb.toString());
if (StringUtil.isNotEmpty(reqPara.getBeginTime())) {
query.setString("beginTime", reqPara.getBeginTime());
}
if (StringUtil.isNotEmpty(reqPara.getEndTime())) {
query.setString("endTime", TimeUtil.getNextNDaysStr(
reqPara.getEndTime(), "yyyy-MM-dd", 1));
}
List<Object[]> charges = query.list();
for (Object[] charge : charges) {
Map<String, String> m = new HashMap<String, String>();
m.put("kind", charge[0].toString());
m.put("thiscnt", charge[1].toString());
m.put("totalCnt", charge[2].toString());
m.put("percentage", charge[3].toString());
m.put("chargeDay", charge[4].toString());
//m.put("generTime", TimeUtil.formatDate((Date) charge[8]));
data.add(m);
}
logger.info("chargesmore:" + data);
} catch (Exception e) {
logger.error("querying chargesmore failed", e);
e.printStackTrace();
} finally {
if (session != null && session.isOpen()) {
session.close();
}
}
return data;
}
若是需要加上百分比的话则是
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CONCAT(ROUND(a.cnt/b.cnt*100,2),'%')显示的就是50%，嘿嘿
这算是一个完整的了，特此记录一下