poi导出excel

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poi导出excel工具类

工具类
package com.huaxia.utils;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;

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;

/**
* @description 导出Excel文档工具
* @date : 2017年2月22日上午9:30:39
*/
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());

// Font f3=wb.createFont();
// f3.setFontHeightInPoints((short) 10);
// f3.setColor(IndexedColors.RED.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((short) 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;}/** * 下载Excel * @param workbook * @param fileName Excel 名称 * @param response */public static void downloadExcel(Workbook workbook,String fileName,HttpServletResponse response){    ByteArrayOutputStream os = new ByteArrayOutputStream();    BufferedInputStream bis = null;    BufferedOutputStream bos = null;    try {        workbook.write(os);        byte[] content = os.toByteArray();        InputStream is = new ByteArrayInputStream(content);        response.reset();        response.setContentType("application/vnd.ms-excel;charset=utf-8");        response.setHeader("Content-Disposition", "attachment;filename="+ new String((fileName + ".xls").getBytes(), "iso-8859-1"));        ServletOutputStream out = response.getOutputStream();        bis = new BufferedInputStream(is);        bos = new BufferedOutputStream(out);        byte[] buff = new byte[2048];        int bytesRead;        while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {            bos.write(buff, 0, bytesRead);        }    } catch (Exception e) {        e.printStackTrace();    } finally {        if (bis != null)            try {                bis.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        if (bos != null)            try {                bos.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }    }}

}

@Overridepublic List<Map<String, Object>> createExcelRecord(List<EnterStatement> list) {    List<Map<String, Object>> listmap = new ArrayList<Map<String, Object>>();    Map<String, Object> map = new HashMap<String, Object>();    map.put("sheetName", "sheet1");    listmap.add(map);    if(list != null && list.size() > 0){        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        for(EnterStatement obj : list){             Map<String, Object> mapValue = new HashMap<String, Object>();             mapValue.put("platOrderNo",obj.getPlatOrderNo() );             mapValue.put("operOrderNo", obj.getOperOrderNo());             mapValue.put("enterName", obj.getEnterName());             mapValue.put("enterCode", obj.getEnterCode());             mapValue.put("createTime", obj.getCreateTime() != null ? format.format(obj.getCreateTime()) : "");             mapValue.put("replyTime", obj.getReplyTime()!=null?format.format(obj.getReplyTime() ):"" );             mapValue.put("reqStatusStr",obj.getReqStatusStr() );             mapValue.put("phone", obj.getPhone());             mapValue.put("platServiceName", obj.getPlatServiceName());             mapValue.put("serviceTypeStr", obj.getServiceTypeStr());             mapValue.put("serviceMethodStr", obj.getServiceMethodStr());             mapValue.put("serviceMoneyStr", obj.getServiceMoneyStr());             mapValue.put("discountRateStr", obj.getDiscountRateStr());             mapValue.put("feeStr", obj.getFeeStr());             listmap.add(mapValue);        }    }    return listmap;}

@RequestMapping(“/exportExcel”)
@SystemControllerLog(operatePoint=OperatePointConstants.EMP_CUSTOMER, operateType=OperateTypeConstants.EXPORT_STATEMENT)
public String exportExcel(HttpServletResponse response){
ReqData reqData = this.getReqData();
String fileName=”企业客户对账单”;

    String columnNames[]={                            "平台订单编号","企业订单编号","客户名称","客户编号",                            "订单创建时间","订单报竣时间","操作结果","用户手机号",                            "平台服务名称","服务类型","服务方式","服务金额",                            "折扣率","实际扣费金额"                         };//列名    String keys[] = {                        "platOrderNo","operOrderNo","enterName","enterCode",                        "createTime","replyTime","reqStatusStr","phone",                        "platServiceName","serviceTypeStr","serviceMethodStr","serviceMoneyStr",                        "discountRateStr","feeStr"                    };//map中的key    List<EnterStatement> enterStatements =statementService.findStatementList(reqData);    List<Map<String,Object>> list=statementService.createExcelRecord(enterStatements);    Workbook workbook = ExcelUtil.createWorkBook(list,keys,columnNames);    ExcelUtil.downloadExcel(workbook, fileName, response);    return null;}

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