sprinboot 使用easypoi实现文件导出Excel
在很多时候,我们需要将一些报表生成Excel的格式文件,相信这个都会有自己的一套util,在这里,简单实现以下:
做一笔记:
1.创建Excel po （注：里边字段为Excel中每列的列名和对于的数据，设置宽高，设置列的顺序（orderNum）等…）
@ExcelTarget("ResCSBZT01130023Po")
public class ResCSBZT01130023Po implements Serializable {
@Excel(name = "省", isImportField = "true_st",height = 10, width = 15,needMerge = true,orderNum="1")
private String province;
@Excel(name = "市", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="2")
private String city;
@Excel(name = "区", isImportField = "true_st",height = 10, width = 15,needMerge = true,orderNum="3")
private String district;
@Excel(name = "微信名", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="4")
private String nickName;
@Excel(name = "微信号", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="5")
private String wxCode;
@Excel(name = "Mac地址", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="6")
private String mac;
@Excel(name = "操作系统", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="7")
private String os;
@Excel(name = "手机设备号", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="6")
private String phoneModel;
@Excel(name = "采集软件版本", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="8")
private String ddVer;
@Excel(name = "微信版本", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="9")
private String wxVer;
// @Excel(name = "采集状态", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="6")
// private String ddState;
@Excel(name = "控制状态", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="10")
private String msgState;
@Excel(name = "最后消息接受时间", isImportField = "true_st",height = 10, width = 20,needMerge = true,orderNum="11")
private String lastTime;
public String getProvince() {
return province;
}
public void setProvince(String province) {
this.province = province;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getDistrict() {
return district;
}
public void setDistrict(String district) {
this.district = district;
}
public String getNickName() {
return nickName;
}
public void setNickName(String nickName) {
this.nickName = nickName;
}
public String getWxCode() {
return wxCode;
}
public void setWxCode(String wxCode) {
this.wxCode = wxCode;
}
public String getMac() {
return mac;
}
public void setMac(String mac) {
this.mac = mac;
}
public String getOs() {
return os;
}
public void setOs(String os) {
this.os = os;
}
public String getPhoneModel() {
return phoneModel;
}
public void setPhoneModel(String phoneModel) {
this.phoneModel = phoneModel;
}
public String getDdVer() {
return ddVer;
}
public void setDdVer(String ddVer) {
this.ddVer = ddVer;
}
public String getWxVer() {
return wxVer;
}
public void setWxVer(String wxVer) {
this.wxVer = wxVer;
}
public String getMsgState() {
return msgState;
}
public void setMsgState(String msgState) {
this.msgState = msgState;
}
public String getLastTime() {
return lastTime;
}
public void setLastTime(String lastTime) {
this.lastTime = lastTime;
}
public ResCSBZT01130023Po(String province, String city, String district, String nickName, String wxCode, String mac, String os, String phoneModel, String ddVer, String wxVer, String msgState, String lastTime) {
this.province = province;
this.city = city;
this.district = district;
this.nickName = nickName;
this.wxCode = wxCode;
this.mac = mac;
this.os = os;
this.phoneModel = phoneModel;
this.ddVer = ddVer;
this.wxVer = wxVer;
this.msgState = msgState;
this.lastTime = lastTime;
}
生成 Constructor和 get set方法
接下来就是需要去查你Excel中需要的数据了
2.对应数据（db中查找出需导出数据，遍历将数据扔到ExcelPo的集合里边）
List salesExcelPoList = new ArrayList<>();
SalesPo salesPo = shopService.getSales(orderInfoPO);
List salesList = salesPo.getSalesList();
salesList.forEach(sales -> {
String goodsName = sales.getGoodsName();
BigDecimal goodsPrice = sales.getGoodsPrice();
Integer goodsSalesNum = sales.getGoodsSalesNum();
BigDecimal goodsSalesPrice = null;
if (null != goodsSalesNum && goodsSalesNum>0){
goodsSalesPrice =sales.getGoodsPrice().multiply(BigDecimal.valueOf(sales.getGoodsSalesNum()));
}
SalesExcelPo salesExcelPo = new SalesExcelPo(goodsName, goodsPrice, goodsSalesNum, goodsSalesPrice);
salesExcelPoList.add(salesExcelPo);
});
- 接下来就是去生成Excel了（一般直接用response导出就好，当然也可以生成InputStream流对数据进行其他发邮件，上传 下载等操作）
我这里需要邮箱发送所以简单做一判断:
//导出操作
if (orderInfoPO.getEmail() == null){
FileUtil.exportExcel(salesExcelPoList, "销售报表", "1", SalesExcelPo.class, "销售报表.xls", response);
}else {
InputStream inputStream=FileUtil.exportExcelEmail(salesExcelPoList, "销售报表", "1", SalesExcelPo.class, "销售报表.xls", response);
utilService.sendMail("销售报表",orderInfoPO.getEmail(),"销售报表.xls",inputStream,from);
}
FIleUtil工具类：
package com.kingstones.common.utils;
import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
@Component
public class FileUtil {
public static void exportExcel(List list, String title, String sheetName, Class pojoClass, String fileName,
boolean isCreateHeader, HttpServletResponse response) throws Exception {
ExportParams exportParams = new ExportParams(title, sheetName);
exportParams.setCreateHeadRows(isCreateHeader);
defaultExport(list, pojoClass, fileName, response, exportParams);
}
public static void exportExcel(List list, String title, String sheetName, Class pojoClass, String fileName,
HttpServletResponse response) {
defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
}
public static InputStream exportExcelEmail(List list, String title, String sheetName, Class pojoClass, String fileName,
HttpServletResponse response) {
return defaultEmailExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
}
public static void exportExcel(List> list, String fileName, HttpServletResponse response)
throws Exception {
defaultExport(list, fileName, response);
}
private static InputStream defaultEmailExport(List list, Class pojoClass, String fileName, HttpServletResponse response,
ExportParams exportParams) {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
InputStream inputStream = null;
Workbook workbook = null;
try {
workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
} catch (Exception e) {
e.printStackTrace();
}
if (workbook != null)
try {
workbook.write(outputStream);
inputStream= new ByteArrayInputStream(outputStream.toByteArray());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return inputStream;
}
private static void defaultExport(List list, Class pojoClass, String fileName, HttpServletResponse response,
ExportParams exportParams) {
Workbook workbook = null;
try {
workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
} catch (Exception e) {
e.printStackTrace();
}
if (workbook != null)
try {
downLoadExcel(fileName, response, workbook);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook)
throws Exception {
try {
response.setCharacterEncoding("UTF-8");
response.setHeader("content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment;filename="+ URLEncoder.encode(fileName, "UTF-8"));
workbook.write(response.getOutputStream());
} catch (IOException e) {
throw new Exception(e.getMessage());
}
}
private static void defaultExport(List> list, String fileName, HttpServletResponse response)
throws Exception {
Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
if (workbook != null)
;
downLoadExcel(fileName, response, workbook);
}
public static List importExcel(String filePath, Integer titleRows, Integer headerRows, Class pojoClass)
throws Exception {
if (org.apache.commons.lang3.StringUtils.isBlank(filePath)) {
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List list = null;
try {
list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
} catch (NoSuchElementException e) {
throw new Exception("模板不能为空");
} catch (Exception e) {
e.printStackTrace();
throw new Exception(e.getMessage());
}
return list;
}
public static List importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class pojoClass)
throws Exception {
if (file == null) {
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List list = null;
try {
list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
} catch (NoSuchElementException e) {
throw new Exception("excel文件不能为空");
} catch (Exception e) {
throw new Exception(e.getMessage());
}
return list;
}
}
这样简单的Excel 工具就好了;
资料:https://blog.csdn.net/xufei512/article/details/82632266