最近做grid列表相关数据导出到excel功能，根据自己选择的列导出成excel 并且下载到本地。废话不说 直接上关键代码：
需要引入相关的包：
compile 'org.apache.poi:poi-ooxml:3.9' compile 'org.apache.poi:poi:3.9' compile 'org.apache.poi:poi-scratchpad:3.9'
这是我项目中gradle的配置。 1.js 代码
window.location.href=
"export/exportExcel?ids="
+
this
.selectedId;
// 此处的selectedId 就是单选或者多选多列的id集合
2. controller
import
com.fndsoft.bcis.model.WithdrawDeposit;
import
com.fndsoft.bcis.service.SettlementService;
import
com.fndsoft.bcis.utils.ExcelUtil;
import
org.springframework.beans.factory.annotation.Autowired;
import
org.springframework.stereotype.Controller;
import
org.springframework.web.bind.annotation.RequestMapping;
import
org.springframework.web.bind.annotation.RequestMethod;
import
org.springframework.web.bind.annotation.RequestParam;
import
org.springframework.web.bind.annotation.ResponseBody;
import
javax.servlet.ServletOutputStream;
import
javax.servlet.http.HttpServletResponse;
import
java.io.*;
import
java.text.SimpleDateFormat;
import
java.util.*;
/**
* Created by bai on 2016/7/26.
*/
@Controller
@RequestMapping
(value =
"/export"
)
public
class
ExportExcelController {
@Autowired
private
SettlementService settlementService;
/**
* 根据多选的结算申请导出excel
*
* @return
*/
@RequestMapping
(value =
"/exportExcel"
, method = RequestMethod.GET)
@ResponseBody
public
Map<String, Object> exportExcel(
@RequestParam
Integer[] ids, HttpServletResponse response)
throws
IOException {
String fileName =
new
Date().getTime() +
".xls"
;
//填充projects数据
List<WithdrawDeposit> projects = createData(ids);
List<Map<String, Object>> list = createExcelRecord(projects);
String columnNames[] = {
"申请号"
,
"提现金额"
,
"申请时间"
,
"支付类型"
,
"账号"
,
"状态"
};
//列名
String keys[] = {
"applicationNo"
,
"amount"
,
"opTime"
,
"payType"
,
"accountNo"
,
"status"
};
//map中的key
ByteArrayOutputStream os =
new
ByteArrayOutputStream();
try
{
ExcelUtil.createWorkBook(list, keys, columnNames).write(os);
}
catch
(IOException e) {
e.printStackTrace();
}
byte
[] content = os.toByteArray();
InputStream is =
new
ByteArrayInputStream(content);
// 设置response参数，可以打开下载页面
response.reset();
response.setContentType(
"application/vnd.ms-excel;charset=utf-8"
);
response.setHeader(
"Content-Disposition"
,
"attachment;filename="
+
new
String(fileName.getBytes(),
"iso-8859-1"
));
ServletOutputStream out = response.getOutputStream();
BufferedInputStream bis =
null
;
BufferedOutputStream bos =
null
;
try
{
bis =
new
BufferedInputStream(is);
bos =
new
BufferedOutputStream(out);
byte
[] buff =
new
byte
[
2048
];
int
bytesRead;
// Simple read/write loop.
while
(-
1
!= (bytesRead = bis.read(buff,
0
, buff.length))) {
bos.write(buff,
0
, bytesRead);
}
}
catch
(
final
IOException e) {
throw
e;
}
finally
{
if
(bis !=
null
)
bis.close();
if
(bos !=
null
)
bos.close();
}
return
null
;
}
private
List<WithdrawDeposit> createData(Integer[] ids) {<br><br>
//自己实现
return
null
;
}
private
List<Map<String, Object>> createExcelRecord(List<WithdrawDeposit> projects) {
List<Map<String, Object>> listmap =
new
ArrayList<Map<String, Object>>();
Map<String, Object> map =
new
HashMap<String, Object>();
SimpleDateFormat format =
new
SimpleDateFormat(
"yyyy-MM-dd"
);
map.put(
"sheetName"
,
"sheet1"
);
listmap.add(map);
WithdrawDeposit project;
for
(
int
j =
0
; j < projects.size(); j++) {
project = projects.get(j);
Map<String, Object> mapValue =
new
HashMap<>();
mapValue.put(
"applicationNo"
, project.getApplicationNo());
mapValue.put(
"amount"
, project.getAmount());
mapValue.put(
"opTime"
, format.format(project.getOpTime()));
mapValue.put(
"payType"
, project.getPayType());
mapValue.put(
"accountNo"
, project.getAccountNo());
mapValue.put(
"status"
, project.getStatus());
listmap.add(mapValue);
}
return
listmap;
}
}
3.excel导出帮助类
import
java.util.List;
import
java.util.Map;
import
org.apache.poi.hssf.usermodel.HSSFWorkbook;
import
org.apache.poi.ss.usermodel.Cell;
import
org.apache.poi.ss.usermodel.CellStyle;
import
org.apache.poi.ss.usermodel.Font;
import
org.apache.poi.ss.usermodel.IndexedColors;
import
org.apache.poi.ss.usermodel.Row;
import
org.apache.poi.ss.usermodel.Sheet;
import
org.apache.poi.ss.usermodel.Workbook;
/**
* 导出Excel文档工具类
*
* @author bai
* @date 2016-7-25
*/
public
class
ExcelUtil {
/**
* 创建excel文档，
*
* @param list 数据
* @param keys list中map的key数组集合
* @param columnNames excel的列名
*/
public
static
Workbook createWorkBook(List<Map<String, Object>> list, String[] keys, String columnNames[]) {
// 创建excel工作簿
Workbook wb =
new
HSSFWorkbook();
// 创建第一个sheet（页），并命名
Sheet sheet = wb.createSheet(list.get(
0
).get(
"sheetName"
).toString());
// 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。
for
(
int
i =
0
; i < keys.length; i++) {
sheet.setColumnWidth((
short
) i, (
short
) (
35.7
*
150
));
}
// 创建第一行
Row row = sheet.createRow((
short
)
0
);
// 创建两种单元格格式
CellStyle cs = wb.createCellStyle();
CellStyle cs2 = wb.createCellStyle();
// 创建两种字体
Font f = wb.createFont();
Font f2 = wb.createFont();
// 创建第一种字体样式（用于列名）
f.setFontHeightInPoints((
short
)
10
);
f.setColor(IndexedColors.BLACK.getIndex());
f.setBoldweight(Font.BOLDWEIGHT_BOLD);
// 创建第二种字体样式（用于值）
f2.setFontHeightInPoints((
short
)
10
);
f2.setColor(IndexedColors.BLACK.getIndex());
// 设置第一种单元格的样式（用于列名）
cs.setFont(f);
cs.setBorderLeft(CellStyle.BORDER_THIN);
cs.setBorderRight(CellStyle.BORDER_THIN);
cs.setBorderTop(CellStyle.BORDER_THIN);
cs.setBorderBottom(CellStyle.BORDER_THIN);
cs.setAlignment(CellStyle.ALIGN_CENTER);
// 设置第二种单元格的样式（用于值）
cs2.setFont(f2);
cs2.setBorderLeft(CellStyle.BORDER_THIN);
cs2.setBorderRight(CellStyle.BORDER_THIN);
cs2.setBorderTop(CellStyle.BORDER_THIN);
cs2.setBorderBottom(CellStyle.BORDER_THIN);
cs2.setAlignment(CellStyle.ALIGN_CENTER);
//设置列名
for
(
int
i =
0
; i < columnNames.length; i++) {
Cell cell = row.createCell(i);
cell.setCellValue(columnNames[i]);
cell.setCellStyle(cs);
}
//设置每行每列的值
for
(
short
i =
1
; i < list.size(); i++) {
// Row 行,Cell 方格 , Row 和 Cell 都是从0开始计数的
// 创建一行，在页sheet上
Row row1 = sheet.createRow(i);
// 在row行上创建一个方格
for
(
short
j =
0
; j < keys.length; j++) {
Cell cell = row1.createCell(j);
cell.setCellValue(list.get(i).get(keys[j]) ==
null
?
" "
: list.get(i).get(keys[j]).toString());
cell.setCellStyle(cs2);
}
}
return
wb;
}
}