运去金成铁，时来铁似金。读书须用意，一字值千金。
1、前端
// 导出只能使用 window.location.href 文件才能下载，用其他的不行，所以请求参数只能用 get 的方式拼接在后面
getExcel(){
window.location.href = "../sys/statistics/poi?dateBegin="+this.query.dateBegin+"&dateEnd="+this.query.dateEnd+"&itemCode="+this.query.itemCode+"&cuCode="+this.query.cuCode+"&classis="+this.query.classis+"&brand="+this.query.brand;
},
2、加遮罩
答：参考博客 导出 excel 加遮罩
3、后端控制层
@GetMapping("/poi")
@ApiOperation(value = "导出excel", notes = "")
public R poi( HttpServletResponse response, HttpServletRequest request
,@RequestParam String dateBegin
,@RequestParam String dateEnd
,@RequestParam String itemCode
,@RequestParam String cuCode
,@RequestParam String classis
,@RequestParam String brand
){
OrderStatisticsDto orderStatisticsDto = new OrderStatisticsDto();
orderStatisticsDto.setDateBegin(dateBegin);
orderStatisticsDto.setDateEnd(dateEnd);
orderStatisticsDto.setItemCode(itemCode);
orderStatisticsDto.setCuCode(cuCode);
orderStatisticsDto.setClassis(classis);
orderStatisticsDto.setBrand(brand);
return (R) disTableForStatisticsService.poi(response,request,orderStatisticsDto);
}
4、后端服务层
public R poi(HttpServletResponse response, HttpServletRequest request,OrderStatisticsDto orderStatisticsDto) {
// orderStatisticsDto.setPage(1);
// orderStatisticsDto.setRows(10);
Map<String, Object> condition = orderStatisticsDto.getCondition();
condition.put("dataType", "DataCount");
List<Map> orderStatisticsCount = disTableForStatisticsDao.getOrderStatistics(condition);
Integer rsCount = (Integer)orderStatisticsCount.get(0).get("RSCount");
List<OrderStatisticsVo> orderStatisticsVos = getOrderStatisticsVos(condition, rsCount);
try {
String title ="订单统计表";
// String[] rowsName=new String[]{"序号","ID","会计科目名称","会计名称描述","记账方向","记账方向"};
ExportExcelUtils ex =new ExportExcelUtils(title, domain, orderStatisticsVos,response);
ex.exportData();
} catch (Exception e) {
e.printStackTrace();
}
return R.ok();
}
5、导出工具类
答：单元格颜色
poi 导出 excel
package com.platform.utils;
import com.platform.response.statistics.OrderStatisticsBrand;
import com.platform.response.statistics.OrderStatisticsItem;
import com.platform.response.statistics.OrderStatisticsVo;
import com.platform.response.statistics.PicColor;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.util.CellRangeAddress;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
public class ExportExcelUtils {
private String title; // 导出表格的表名
private String domain;// 服务器域名
private BufferedImage bufferImg = null;
private List<OrderStatisticsVo> dataList = new ArrayList<>(); // 对象数组的List集合
private HttpServletResponse response;
// 传入要导入的数据
public ExportExcelUtils(String title,String domain,List<OrderStatisticsVo> dataList,HttpServletResponse response){
this.title=title;
this.domain=domain;
this.dataList=dataList;
this.response = response;
}
// 导出数据
public void exportData(){
try {
HSSFWorkbook workbook =new HSSFWorkbook(); // 创建一个excel对象
HSSFSheet sheet =workbook.createSheet(title); // 创建表格
sheet.setColumnWidth(0, 20 * 256); // 设置第一列的宽度
sheet.setColumnWidth(1, 40 * 256); // 设置第二列的宽度
sheet.setColumnWidth(2, 20 * 256); // 设置第一列的宽度
sheet.setColumnWidth(3, 15 * 256); // 设置第一列的宽度
sheet.setColumnWidth(4, 10 * 256); // 设置第一列的宽度
sheet.setColumnWidth(5, 10 * 256); // 设置第一列的宽度
// 产生表格标题行
HSSFRow rowm =sheet.createRow(0); // 行
HSSFCell cellTiltle =rowm.createCell(0); // 单元格
// sheet样式定义
HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook); // 头样式
HSSFCellStyle style = this.getStyle(workbook); // 单元格样式
/**
* 参数说明
* 从0开始 第一行 第一列 都是从角标0开始
* 行 列 行列 (0,0,0,5) 合并第一行 第一列 到第一行 第六列
* 起始行，起始列，结束行，结束列
*
* new Region() 这个方法使过时的
*/
// 合并第一行的所有列
sheet.addMergedRegion(new CellRangeAddress(0, (short) 0, 0, (short) (5)));
cellTiltle.setCellStyle(columnTopStyle);
cellTiltle.setCellValue(title);
// int columnNum = rowName.length; // 表格列的长度
// 第二行====================================================================================
int r = 1;
// for(int i = 1 ;i<2+1 ;i++){
for(OrderStatisticsVo data: dataList){
HSSFRow rowRowName = getRows(workbook, sheet, r++);
getCell(columnTopStyle, rowRowName, 0, "供应商名称");
getCell(style, rowRowName, 1, data.getVsi_VendorName());
getCell(columnTopStyle, rowRowName, 2, "联系电话");
getCell(style, rowRowName, 3, data.getVD_TEL1()+" "+data.getVD_CONTACTEL2());
getCell(columnTopStyle, rowRowName, 4, "地址");
getCell(style, rowRowName, 5, data.getVD_ADDR());
// 第三行====================================================================================
HSSFRow rowRowNameThree = getRows(workbook, sheet, r++);
getCell(columnTopStyle, rowRowNameThree, 0, "品牌");
getCell(columnTopStyle, rowRowNameThree, 1, "款号");
getCell(columnTopStyle, rowRowNameThree, 2, "图片");
getCell(columnTopStyle, rowRowNameThree, 3, "颜色");
getCell(columnTopStyle, rowRowNameThree, 4, "尺码");
// getCell(columnTopStyle, rowRowNameThree, 5, "备注");
HSSFRow rowRowNameFour = null;
int brandRow = 0;
for (OrderStatisticsBrand brand: data.getOrderStatisticsBrandList()){// 渲染品牌
// 第四行====================================================================================
int firstRow = r; // 用以合并单元格
rowRowNameFour = getRows(workbook, sheet, r++);
getCell(style, rowRowNameFour, 0, brand.getVsi_brandName());
// getCell(style, rowRowNameFive, 1, "A280260");
// getCell(style, rowRowNameFive, 2, "暂无图片");
// getCell(style, rowRowNameFive, 3, "白色");
// getCell(style, rowRowNameFive, 4, "120");
// getCell(style, rowRowNameFive, 5, "130");
// getCell(style, rowRowNameFive, 6, "140");
// 第五行====================================================================================
int brandSize = 0; // 控制尺码行占用品牌行
for (OrderStatisticsItem item : brand.getOrderStatisticsItemList()){ // 渲染款
brandRow++; // 控制合并 尺码
int itemRow = r; // 用以合并单元格
brandSize++;
if (brandSize != 1) { // 尺码一行，第一次不建，其他都要建
rowRowNameFour = getRows(workbook, sheet, r++);// 款号
itemRow = r;
}
// getCell(style, rowRowNameFour, 0, "");
getCell(style, rowRowNameFour, 1, item.getVsi_item());
int size = 4;
if(item.getVsi_sizeName().size() > 1 && brandRow == 1){
sheet.addMergedRegion(new CellRangeAddress(r-2, r-2, 4, 4+item.getVsi_sizeName().size()-1)); // 合并 尺码 单元格
}
for(String sizeName : item.getVsi_sizeName()){ // 渲染尺码名字
getCell(columnTopStyle, rowRowNameFour, size++, sizeName);
}
for(PicColor picColor : item.getPicColors()){ // 颜色
int colorCol = 3;
rowRowNameFour = getRows(workbook, sheet, r++);
getCell(style, rowRowNameFour, 0, "");//品牌一列
getCell(style, rowRowNameFour, 1, "");//款号一列
// 单元格中写入图片
try {
ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
bufferImg = (BufferedImage) ImageIO.read(getFileFromImageUrl(domain+picColor.getPic()));
ImageIO.write(bufferImg, "jpg", byteArrayOut);
HSSFPatriarch patri_item = sheet.createDrawingPatriarch();
HSSFClientAnchor anchor_item = new HSSFClientAnchor(0, 0, 0, 0, (short) (colorCol-1), r-1, (short) colorCol, r);
patri_item.createPicture(anchor_item , workbook.addPicture(byteArrayOut.toByteArray(), HSSFWorkbook.PICTURE_TYPE_JPEG));
} catch (Exception e) {
e.printStackTrace();
getCell(style, rowRowNameFour, colorCol-1, "暂无图片");
}
// getCell(style, rowRowNameFour, colorCol-1, "暂无图片");
getCell(columnTopStyle, rowRowNameFour, colorCol, picColor.getColorName());
for(Integer sizeL : picColor.getSizeList()){
getCell(style, rowRowNameFour, ++colorCol, sizeL+"");
}
}
sheet.addMergedRegion(new CellRangeAddress(itemRow-1, r-1, 1, 1)); // 合并款号单元格
}
sheet.addMergedRegion(new CellRangeAddress(firstRow, r-1, 0, 0)); // 合并品牌单元格
// rowRowNameFour = getRows(workbook, sheet, r++);
//
// getCell(style, rowRowNameFour, 0, "");
// getCell(style, rowRowNameFour, 1, "");
// getCell(style, rowRowNameFour, 2, "");
// getCell(style, rowRowNameFour, 3, "");
// getCell(columnTopStyle, rowRowNameFour, 4, "S");
// getCell(columnTopStyle, rowRowNameFour, 5, "X");
// getCell(columnTopStyle, rowRowNameFour, 6, "L");
}
// 第六行,空白行====================================================================================
HSSFRow rowRowNameSix = getRows(workbook, sheet, r++);
getCell(null, rowRowNameSix, 0, "");
getCell(null, rowRowNameSix, 1, "");
getCell(null, rowRowNameSix, 2, "");
getCell(null, rowRowNameSix, 3, "");
getCell(null, rowRowNameSix, 4, "");
getCell(null, rowRowNameSix, 5, "");
getCell(null, rowRowNameSix, 6, "");
}
// 循环 将列名放进去
// for (int i = 0; i < columnNum; i++) {
// HSSFCell cellRowName = rowRowName.createCell((int)i);
// cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING); // 单元格类型
//
// HSSFRichTextString text = new HSSFRichTextString(rowName[i]); // 得到列的值
// cellRowName.setCellValue(text); // 设置列的值
// cellRowName.setCellStyle(columnTopStyle); // 样式
// }
// 将查询到的数据设置到对应的单元格中
// for (int i = 0; i < dataList.size(); i++) {
// Object[] obj = dataList.get(i);//遍历每个对象
// HSSFRow row = sheet.createRow(i+2);//创建所需的行数
// for (int j = 0; j < obj.length; j++) {
// HSSFCell cell = null; //设置单元格的数据类型
// if(j==0){
// // 第一列设置为序号
// cell = row.createCell(j,HSSFCell.CELL_TYPE_NUMERIC);
// cell.setCellValue(i+1);
// }else{
// cell = row.createCell(j,HSSFCell.CELL_TYPE_STRING);
// if(!"".equals(obj[j]) && obj[j] != null){
// cell.setCellValue(obj[j].toString()); //设置单元格的值
// }else{
// cell.setCellValue(" ");
// }
// }
// cell.setCellStyle(style); // 样式
// }
// }
// 让列宽随着导出的列长自动适应
// sheet.autoSizeColumn((short)0); //调整第一列宽度
// sheet.autoSizeColumn((short)1); //调整第二列宽度
// sheet.autoSizeColumn((short)2); //调整第三列宽度
// sheet.autoSizeColumn((short)3); //调整第四列宽度
// sheet.autoSizeColumn((short)4); //调整第五列宽度
// sheet.autoSizeColumn((short)5); //调整第六列宽度
if(workbook !=null){
try
{
// excel 表文件名
String fileName = title + String.valueOf(System.currentTimeMillis()).substring(4, 13) + ".xls";
String fileName11 = URLEncoder.encode(fileName,"UTF-8");
String headStr = "attachment; filename=\"" + fileName11 + "\"";
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", headStr);
OutputStream out = response.getOutputStream();
workbook.write(out);
out.flush();
out.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
}catch(Exception e){
e.printStackTrace();
}
}
/**
* @Description: 创建一行 i：在第 i 行创建行
* @Author: 陈铨 2019/10/22 21:05
*/
public HSSFRow getRows(HSSFWorkbook workbook, HSSFSheet sheet, int i) {
HSSFRow rowRowName = sheet.createRow(i); // 在第二行创建行
HSSFCellStyle cells = workbook.createCellStyle();
cells.setBottomBorderColor(HSSFColor.BLACK.index);
rowRowName.setRowStyle(cells);
return rowRowName;
}
/**
* @Description: 创建一格
* @Author: 陈铨 2019/10/22 21:04
*/
public void getCell(HSSFCellStyle columnTopStyle, HSSFRow rowRowName, int i, String str) {
HSSFCell cellRowNameOne = rowRowName.createCell(i);
cellRowNameOne.setCellType(HSSFCell.CELL_TYPE_STRING); // 单元格类型
HSSFRichTextString textOne = new HSSFRichTextString(str); // 得到列的值
cellRowNameOne.setCellValue(textOne); // 设置列的值
cellRowNameOne.setCellStyle(columnTopStyle); // 样式
}
public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {
// 设置字体
HSSFFont font = workbook.createFont();
//设置字体大小
font.setFontHeightInPoints((short)11);
//字体加粗
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
//设置字体名字
font.setFontName("Courier New");
//设置样式;
HSSFCellStyle style = workbook.createCellStyle();
//设置底边框;
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
//设置底边框颜色;
style.setBottomBorderColor(HSSFColor.BLACK.index);
//设置左边框;
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
//设置左边框颜色;
style.setLeftBorderColor(HSSFColor.BLACK.index);
//设置右边框;
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
//设置右边框颜色;
style.setRightBorderColor(HSSFColor.BLACK.index);
//设置顶边框;
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
//设置顶边框颜色;
style.setTopBorderColor(HSSFColor.BLACK.index);
//在样式用应用设置的字体;
style.setFont(font);
//设置自动换行;
style.setWrapText(false);
//设置水平对齐的样式为居中对齐;
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//设置垂直对齐的样式为居中对齐;
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 设置单元格颜色
style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE
.getIndex());
style.setFillPattern(CellStyle.SOLID_FOREGROUND);
return style;
}
public HSSFCellStyle getStyle(HSSFWorkbook workbook) {
// 设置字体
HSSFFont font = workbook.createFont();
//设置字体大小
//font.setFontHeightInPoints((short)10);
//字体加粗
//font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
//设置字体名字
font.setFontName("Courier New");
//设置样式;
HSSFCellStyle style = workbook.createCellStyle();
//设置底边框;
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
//设置底边框颜色;
style.setBottomBorderColor(HSSFColor.BLACK.index);
//设置左边框;
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
//设置左边框颜色;
style.setLeftBorderColor(HSSFColor.BLACK.index);
//设置右边框;
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
//设置右边框颜色;
style.setRightBorderColor(HSSFColor.BLACK.index);
//设置顶边框;
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
//设置顶边框颜色;
style.setTopBorderColor(HSSFColor.BLACK.index);
//在样式用应用设置的字体;
style.setFont(font);
//设置自动换行;
style.setWrapText(false);
//设置水平对齐的样式为居中对齐;
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//设置垂直对齐的样式为居中对齐;
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
return style;
}
public static File getFileFromImageUrl(String urlStr) throws Exception {
//new一个URL对象
URL url = new URL(urlStr);
//打开链接
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//设置请求方式为"GET"
conn.setRequestMethod("GET");
//超时响应时间为5秒
conn.setConnectTimeout(5 * 1000);
//通过输入流获取图片数据
InputStream inStream = conn.getInputStream();
//得到图片的二进制数据，以二进制封装得到数据，具有通用性
byte[] data = readInputStream(inStream);
//new一个文件对象用来保存图片，默认保存当前工程根目录
File imageFile = new File("pic20170419.jpg");
//创建输出流
FileOutputStream outStream = new FileOutputStream(imageFile);
//写入数据
outStream.write(data);
//关闭输出流
outStream.close();
return imageFile;
}
public static byte[] readInputStream(InputStream inStream) throws Exception{
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
//创建一个Buffer字符串
byte[] buffer = new byte[1024];
//每次读取的字符串长度，如果为-1，代表全部读取完毕
int len = 0;
//使用一个输入流从buffer里把数据读取出来
while( (len=inStream.read(buffer)) != -1 ){
//用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度
outStream.write(buffer, 0, len);
}
//关闭输入流
inStream.close();
//把outStream里的数据写入内存
return outStream.toByteArray();
}
}