springmvc导出excel并弹出下载框
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) {
//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;
}
}
执行之后会在你浏览器的下边看到下载的文件直接双击打开就行。
