批量或者选择导出datagrid列表数据到表格

        //导出项目信息
        function exportXmxx(){
            //判断是否选择站址
            var index = $("#dgObj").datagrid('getChecked');
            if(index.length == ){
                alert('请选择您要导出的信息！');
                return;
            }
            var sheetId = "";
            if(!selectAllPageFlag){//是否全选
                   for (var i = ; i < index.length; i++) {
                    var row = index[i];
                    if(sheetId == ""){
                           sheetId = row.SHEETID;
                       }else{
                           sheetId = sheetId+","+row.SHEETID;
                       }
                }
               }
               var data = {
                xmmc:$("#ssxm").combobox("getText"),//所属项目(模糊)
                xmlx:$("#xmlx").combobox("getText"),//项目类型(模糊)
                  xmzt:$("#xmzt").combobox("getValue"),//项目状态
                sheetId:sheetId//选中记录的IDS
            };

            var url = window.location.protocol + "//" + window.location.host + resources.webappName + "/servlet/exportXmxx";
                 name = "导出项目信息表";
            openPostWindow(url, JSON.stringify(data), name); //调用openPostWindow方法，请求JSP url post 传递参数
        }
        /*********请求JSP url post 传递参数**********************/
        function openPostWindow(url, data, name) {
            var tempForm = document.createElement("form");
            data = encodeURI(encodeURI(data));//两次加密避免中文乱码
            tempForm.id="tempForm1";
            tempForm.method="post";
            tempForm.action=url;
            if(name != null && name!=undefined && name != ''){//当需要打开一个新窗口时必须要传递一个name
                tempForm.target=name;
            }else{
                tempForm.target="_self";
            }
            var hideInput = document.createElement("input");
            hideInput.type="hidden";
            hideInput.name= "params";//接收的名字
            hideInput.value= data;
            tempForm.appendChild(hideInput);
            if(name != null && name!=undefined && name != ''){//当需要打开一个新窗口时必须要传递一个name
                tempForm.attachEvent("onsubmit",function(){ _openWindow(name); });
            }else{
                tempForm.attachEvent("onsubmit",function(){ return false; });
            }
            document.body.appendChild(tempForm);
            tempForm.fireEvent("onsubmit");
            tempForm.submit();
            document.body.removeChild(tempForm);
        }

        function _openWindow(name){
            window.open('about:blank',name,'channelmode=1,fullscreen=1');
        }

1.以上为前台部分

2.做好对应的配置

3.以下为后台代码参考示例：

package com.sdjxd.rsgxm.xmzfzr.dao;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.sdjxd.pms.platform.data.DbOper;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URLDecoder;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import sadmpweb.zzgl.Util;

public class exportXmxxDao extends HttpServlet
{
  public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
  {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒");
    Date dt = new Date();
    String time = sdf.format(dt);
    String path1 = System.getProperty("user.dir");
    path1 = path1.substring(, path1.indexOf("bin")) + "webapps\\sadmpserver\\";
    String sourcePath = path1 + "resource\\数据导出公用模板.xlsx";
    String descPath = path1 + "resource";
    File fileDir = new File(descPath);
    if (!fileDir.exists()) {
      fileDir.mkdir();
    }
    String targetFileName = "弱栅格—项目信息表导出—" + time + ".xlsx";
    File targetFile = new File(fileDir, targetFileName);
    String targetFilePath = targetFile.getPath();

    String data = (request.getParameter("params") == null) ? "" : request.getParameter("params");
    data = URLDecoder.decode(URLDecoder.decode(data, "utf-8"), "utf-8");
    Gson gson = new Gson();
    Map jsonObj = (Map)gson.fromJson(data, new TypeToken() {  }
    .getType());

    String filter = getFilter(jsonObj);
    try {
      targetFile = new Util().copyFile(sourcePath, targetFilePath);
      FileInputStream fis = new FileInputStream(targetFile);

      XSSFWorkbook wb = new XSSFWorkbook(fis);
      XSSFSheet hs1 = wb.getSheetAt();
      XSSFRow row1 = hs1.createRow();

      XSSFCell cell00 = row1.createCell();
      XSSFCell cell01 = row1.createCell();
      XSSFCell cell02 = row1.createCell();
      XSSFCell cell03 = row1.createCell();
      XSSFCell cell04 = row1.createCell();
      XSSFCell cell05 = row1.createCell();
      XSSFCell cell06 = row1.createCell();
      XSSFCell cell07 = row1.createCell();
      XSSFCell cell08 = row1.createCell();
      XSSFCell cell09 = row1.createCell();
      XSSFCell cell10 = row1.createCell();
      XSSFCell cell11 = row1.createCell();
      XSSFCell cell12 = row1.createCell();
      XSSFCell cell13 = row1.createCell();
      XSSFCell cell14 = row1.createCell();
      XSSFCell cell15 = row1.createCell();
      XSSFCell cell16 = row1.createCell();
      XSSFCell cell17 = row1.createCell();
      cell00.setCellValue("数据列名1");
      cell01.setCellValue("数据列名2");
      cell02.setCellValue("数据列名2");
      cell03.setCellValue("数据列名4");
      cell04.setCellValue("数据列名5");
      cell05.setCellValue("数据列名6");
      cell06.setCellValue("数据列名7");
      cell07.setCellValue("数据列名8");
      cell08.setCellValue("数据列名9");
      cell09.setCellValue("数据列名10");
      cell10.setCellValue("数据列名11");
      cell11.setCellValue("数据列名12");
      cell12.setCellValue("数据列名13");
      cell13.setCellValue("数据列名14");
      cell14.setCellValue("数据列名15");
      cell15.setCellValue("数据列名16");
      cell16.setCellValue("数据列名17");
      cell17.setCellValue("数据列名18");

      dcxx(fis, wb, filter);

      FileOutputStream out = new FileOutputStream(targetFile);
      wb.write(out);
      downloadFile(request, response, targetFileName, descPath + "\\" + targetFileName);
      fis.close();
      out.flush();
      out.close();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {
    doGet(request, response);
  }

  public void downloadFile(HttpServletRequest request, HttpServletResponse response, String targetFileName, String path_filename) throws Exception
  {
    response.setContentType("text/html;charset=UTF-8");
    BufferedInputStream in = null;
    BufferedOutputStream out = null;
    request.setCharacterEncoding("UTF-8");
    try {
      File f = new File(path_filename);
      response.setContentType("application/x-excel");
      response.setCharacterEncoding("UTF-8");
      response.setHeader("Content-Disposition", "attachment; filename=" + new String(targetFileName.getBytes("gbk"), "iso-8859-1"));
      response.setHeader("Content-Length", String.valueOf(f.length()));
      in = new BufferedInputStream(new FileInputStream(f));
      out = new BufferedOutputStream(response.getOutputStream());
      byte[] data = new byte[];
      int len = ;
      while (- != (len = in.read(data, , data.length)))
        out.write(data, , len);
    }
    catch (Exception e) {
      e.printStackTrace();
    } finally {
      if (in != null) {
        in.close();
      }
      if (out != null)
        out.close();
    }
  }

  private String getFilter(Map<String, String> jsonObj)
  {
    String res = "";
    String xmmc = (String)jsonObj.get("xmmc");
    String xmzt = (String)jsonObj.get("xmzt");
    String xmlx = (String)jsonObj.get("xmlx");
    String sheetId = (String)jsonObj.get("sheetId");

    StringBuffer filter = new StringBuffer();

    if ((xmmc != null) && (!"".equals(xmmc)) && (!xmmc.equals("--不限--"))) {
      filter.append(" AND WYXMJC LIKE '%").append(xmmc).append("%' ");
    }
    if ((xmlx != null) && (!"".equals(xmlx)) && (!xmlx.equals("--不限--"))) {
      filter.append(" AND XMSX LIKE '%").append(xmlx).append("%' ");
    }
    if ((xmzt != null) && (!"".equals(xmzt)) && (!xmzt.equals("--不限--"))) {
      filter.append(" AND XMZT = '").append(xmzt).append("' ");
    }
    if ((sheetId != null) && (!"".equals(sheetId))) {
      filter.append(" AND SHEETID IN ('").append(sheetId.replaceAll(",", "','")).append("') ");
    }
    res = filter.toString();
    return res;
  }

  private void dcxx(FileInputStream fis, XSSFWorkbook wb, String filter) throws SQLException {
    StringBuffer sb = new StringBuffer();
    sb.append(" SELECT *FROM ( SELECT ROW_NUMBER() OVER (  ORDER BY  X.WYXMBH DESC  ) AS ROWNUMBER,  X.* FROM SD_RSG_XMGL X");

    sb.append(" WHERE 1=1");
    sb.append(filter.toString());
    sb.append("  ) A  ORDER BY ROWNUMBER");

    ResultSet rs = DbOper.executeQuery(sb.toString());
    XSSFSheet hs1 = wb.getSheetAt();
    int i = ;
    while (rs.next()) {
      XSSFRow row1 = hs1.createRow(i);
      String WYXMMC = turn(rs.getString("WYXMMC"));
      String WYXMJC = turn(rs.getString("WYXMJC"));
      String WYXMBH = turn(rs.getString("WYXMBH"));
      String XMFZR = turn(rs.getString("XMFZR"));
      String JF = turn(rs.getString("JF"));
      String JFXTBH = turn(rs.getString("JFXTBH"));
      String JFXTMC = turn(rs.getString("JFXTMC"));
      String YYS = turn(rs.getString("YYS"));
      String YYSID = turn(rs.getString("YYSID"));
      String ZS = turn(rs.getString("ZS"));
      String ZSID = turn(rs.getString("ZSID"));
      String XMZT = turn(rs.getString("XMZT"));
      if ("".equals(XMZT))
        XMZT = "未开始";
      else if ("".equals(XMZT))
        XMZT = "进行中";
      else if ("".equals(XMZT)) {
        XMZT = "已完成";
      }
      String XMSX = turn(rs.getString("XMSX"));
      String XMRWZT = turn(rs.getString("XMRWZT"));
      if ("".equals(XMRWZT))
        XMRWZT = "未开始";
      else if ("".equals(XMRWZT))
        XMRWZT = "进行中";
      else if ("".equals(XMRWZT)) {
        XMRWZT = "已完成";
      }
      String XMSJZT = turn(rs.getString("XMSJZT"));
      if ("".equals(XMSJZT))
        XMSJZT = "未开始";
      else if ("".equals(XMSJZT))
        XMSJZT = "进行中";
      else if ("".equals(XMSJZT)) {
        XMSJZT = "已完成";
      }
      String XMKSSJ = turn(rs.getString("XMKSSJ"));
      String XMJSSJ = turn(rs.getString("XMJSSJ"));
      String XMFW = turn(rs.getString("XMFW"));
      String XMSM = turn(rs.getString("XMSM"));
      String XMBZ = turn(rs.getString("XMBZ"));
      XSSFCell cell00 = row1.createCell();
      XSSFCell cell01 = row1.createCell();
      XSSFCell cell02 = row1.createCell();
      XSSFCell cell03 = row1.createCell();
      XSSFCell cell04 = row1.createCell();
      XSSFCell cell05 = row1.createCell();
      XSSFCell cell06 = row1.createCell();
      XSSFCell cell07 = row1.createCell();
      XSSFCell cell08 = row1.createCell();
      XSSFCell cell09 = row1.createCell();
      XSSFCell cell10 = row1.createCell();
      XSSFCell cell11 = row1.createCell();
      XSSFCell cell12 = row1.createCell();
      XSSFCell cell13 = row1.createCell();
      XSSFCell cell14 = row1.createCell();
      XSSFCell cell15 = row1.createCell();
      XSSFCell cell16 = row1.createCell();
      XSSFCell cell17 = row1.createCell();
      cell00.setCellValue(WYXMMC);
      cell01.setCellValue(WYXMJC);
      cell02.setCellValue(WYXMBH);
      cell03.setCellValue(XMFZR);
      cell04.setCellValue(JF);
      cell05.setCellValue(JFXTBH);
      cell06.setCellValue(JFXTMC);
      cell07.setCellValue(YYS);
      cell08.setCellValue(ZS);
      cell09.setCellValue(XMZT);
      cell10.setCellValue(XMSX);
      cell11.setCellValue(XMRWZT);
      cell12.setCellValue(XMSJZT);
      cell13.setCellValue(XMKSSJ);
      cell14.setCellValue(XMJSSJ);
      cell15.setCellValue(XMFW);
      cell16.setCellValue(XMSM);
      cell17.setCellValue(XMBZ);
      ++i;
    }
  }

  public static String turn(String s) {
    if (("NULL".equals(s)) || ("".equals(s)) || (s == null) || ("null".equals(s)) || ("无".equals(s))) {
      s = " ";
    }
    return s;
  }
}