springmvc導出excel並彈出下載框

最近做grid列表相關數據導出到excel功能，根據自己選擇的列導出成excel 並且下載到本地。廢話不說 直接上關鍵代碼：

需要引入相關的包：

compile 'org.apache.poi:poi-ooxml:3.9'
compile 'org.apache.poi:poi:3.9'
compile 'org.apache.poi:poi-scratchpad:3.9'

這是我項目中gradle的配置。

1.js 代碼

window.location.href="export/exportExcel?ids=" + this.selectedId;
//  此處的selectedId 就是單選或者多選多列的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;


  /**
   * 根據多選的結算申請導出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數據
    List<WithdrawDeposit> projects = createData(ids);
    List<Map<String, Object>> list = createExcelRecord(projects);
    String columnNames[] = {"申請號", "提現金額", "申請時間", "支付類型", "賬號", "狀態"};//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);
    // 設置response參數，可以打開下載頁面
    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) {

    //自己實現
    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導出幫助類

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;

/**
 * 導出Excel文檔工具類
 *
 * @author bai
 * @date 2016-7-25
 */
public class ExcelUtil {

  /**
   * 創建excel文檔，
   *
   * @param list        數據
   * @param keys        list中map的key數組集合
   * @param columnNames excel的列名
   */
  public static Workbook createWorkBook(List<Map<String, Object>> list, String[] keys, String columnNames[]) {
    // 創建excel工作簿
    Workbook wb = new HSSFWorkbook();
    // 創建第一個sheet（頁），並命名
    Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString());
    // 手動設置列寬。第一個參數表示要為第幾列設；，第二個參數表示列的寬度，n為列高的像素數。
    for (int i = 0; i < keys.length; i++) {
      sheet.setColumnWidth((short) i, (short) (35.7 * 150));
    }

    // 創建第一行
    Row row = sheet.createRow((short) 0);

    // 創建兩種單元格格式
    CellStyle cs = wb.createCellStyle();
    CellStyle cs2 = wb.createCellStyle();

    // 創建兩種字體
    Font f = wb.createFont();
    Font f2 = wb.createFont();

    // 創建第一種字體樣式（用於列名）
    f.setFontHeightInPoints((short) 10);
    f.setColor(IndexedColors.BLACK.getIndex());
    f.setBoldweight(Font.BOLDWEIGHT_BOLD);

    // 創建第二種字體樣式（用於值）
    f2.setFontHeightInPoints((short) 10);
    f2.setColor(IndexedColors.BLACK.getIndex());

    // 設置第一種單元格的樣式（用於列名）
    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);

    // 設置第二種單元格的樣式（用於值）
    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);
    //設置列名
    for (int i = 0; i < columnNames.length; i++) {
      Cell cell = row.createCell(i);
      cell.setCellValue(columnNames[i]);
      cell.setCellStyle(cs);
    }
    //設置每行每列的值
    for (short i = 1; i < list.size(); i++) {
      // Row 行,Cell 方格 , Row 和 Cell 都是從0開始計數的
      // 創建一行，在頁sheet上
      Row row1 = sheet.createRow(i);
      // 在row行上創建一個方格
      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;
  }

}

　　

執行之后會在你瀏覽器的下邊看到下載的文件直接雙擊打開就行。