EXT结合POI导出数据到Excel表格

function exportExcel(){
var gridpanel = grid;   //'Ext.grid.Panel'

var cm=gridpanel.columns;
//封装表格数据
var data=[];
var store = gridpanel.getStore();
store.each(function(record){
data.push(record.data);

},this);
//获取表头的dataIndex
var headerIndex=[];
Ext.Array.forEach( cm, function(item){

if (item.xtype == "gridcolumn"&&!item.isHidden()) {
headerIndex.push(item.dataIndex);
}

});
//获取表头的Text
var headText=[];
Ext.Array.forEach( cm, function(item){

if (item.xtype == "gridcolumn"&&!item.isHidden()) {
headText.push(item.text);
}

});
if (!Ext.fly('frmDummy')) {
var frm = document.createElement('form');
frm.id = 'frmDummy';
frm.name = gridpanel.getId();
frm.className = 'x-hidden';
document.body.appendChild(frm);
}

Ext.Ajax.request({
disableCaching: true ,
url: path+'/exportExcelByExtAndPOI/exportExcel.do',
method: 'POST',
isUpload: true,
form: Ext.fly('frmDummy'),
params: {
excleData:Ext.JSON.encode(data),
excleHeader:Ext.JSON.encode(headerIndex),
excleText:Ext.JSON.encode(headText)
}
});
}

package com.hrtel.framework.util;

import java.io.OutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

@Controller
@RequestMapping("/exportExcelByExtAndPOI")
public class ExportExcelByExtAndPOI {

private static final Logger logger = Logger.getLogger(ExportExcelByExtAndPOI.class);

@RequestMapping("/exportExcel")
public void exportExcel(HttpServletRequest request, HttpServletResponse response){
logger.info("*******into method exportExcel**********");
String excleData  = request.getParameter("excleData");
String excleHeader = request.getParameter("excleHeader");
String excleText = request.getParameter("excleText");
JSONArray excle = JSONArray.fromObject(excleData);
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet();
// 解析表头
JSONArray dataHeader = JSONArray.fromObject(excleText);
HSSFRow headrow = sheet.createRow(0);
for (int col = 0; col < dataHeader.size(); col++) {
String mycell = dataHeader.getString(col);
HSSFCell cell = headrow.createCell(col);
// 定义单元格为字符串类型
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
// 在单元格中输入一些内容
cell.setCellValue(mycell);
}
int r=0;
for(Object o : excle) {
JSONObject excleObj = (JSONObject)o;
HSSFRow row=sheet.createRow((short)r+1);

//解析列
JSONArray dataIndex = JSONArray.fromObject(excleHeader);

for(int col=0;col<dataIndex.size();col++){
String mycell=dataIndex.getString(col);
mycell=excleObj.getString(mycell);
HSSFCell cell = row.createCell(col);
// 定义单元格为字符串类型
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
// 在单元格中输入一些内容
cell.setCellValue(mycell);

}
r++;
};
//通过Response把数据以Excel格式保存
response.reset();
response.setContentType("application/msexcel;charset=UTF-8");
response.setCharacterEncoding("UTF-8");
try {
response.addHeader("Content-Disposition", "attachment;filename=\""
+ new String(("test" + ".xls").getBytes("UTF-8"),
"ISO8859_1") + "\"");
OutputStream out = response.getOutputStream();
workbook.write(out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}