POI导出EXCEL

//网上代码下面是自己代码

import java.awt.Color;
import java.io.File;
import java.io.FileOutputStream;
 
import org.apache.commons.io.FileUtils;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPalette;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.ClientAnchor;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.ss.usermodel.Drawing;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
 
public final class TestExportExcel {
 
    public static void main(String[] args) throws Exception  {
 
        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet("table");  //创建table工作薄
        Object[][] datas = {{"区域产品销售额","",""},{"区域", "总销售额(万元)", "总利润(万元)简单的表格"}, {"江苏省" , 9045,  2256}, {"广东省", 3000, 690}};
        HSSFRow row;
        HSSFCell cell;
         
        short colorIndex = 10;
        HSSFPalette palette = wb.getCustomPalette();
        Color rgb = Color.GREEN;
        short bgIndex = colorIndex ++; 
        palette.setColorAtIndex(bgIndex, (byte) rgb.getRed(), (byte) rgb.getGreen(), (byte) rgb.getBlue());
        short bdIndex = colorIndex ++;
        rgb = Color.BLACK;
        palette.setColorAtIndex(bdIndex, (byte) rgb.getRed(), (byte) rgb.getGreen(), (byte) rgb.getBlue());
         
        for(int i = 0; i < datas.length; i++) {
            row = sheet.createRow(i);//创建表格行
            for(int j = 0; j < datas[i].length; j++) {
                cell = row.createCell(j);//根据表格行创建单元格
                cell.setCellValue(String.valueOf(datas[i][j]));
                 
                HSSFCellStyle cellStyle = wb.createCellStyle();
                if(i == 0 || i == 1) {
                      cellStyle.setFillForegroundColor(bgIndex); //bgIndex 背景颜色下标值
                      cellStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
                }
               
                cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
                cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
                cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
                cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
                //bdIndex 边框颜色下标值
                cellStyle.setBottomBorderColor(bdIndex);
                cellStyle.setLeftBorderColor(bdIndex);
                cellStyle.setRightBorderColor(bdIndex);
                cellStyle.setTopBorderColor(bdIndex);
                 
                cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
                cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
                 
                if(i == datas.length - 1 && j == datas[0].length - 1) {
                    HSSFFont font = wb.createFont();
                    font.setItalic(true);
                    font.setUnderline(HSSFFont.U_SINGLE);
                    font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
                    font.setFontHeightInPoints((short)14);
                    cellStyle.setFont(font);
                }
                cell.setCellStyle(cellStyle);
            }
        }
         
        //加入图片
        byte[] bt = FileUtils.readFileToByteArray(new File("/Users/mike/pie.png"));
        int pictureIdx = wb.addPicture(bt, Workbook.PICTURE_TYPE_PNG);
        CreationHelper helper = wb.getCreationHelper();
        Drawing drawing = sheet.createDrawingPatriarch();
        ClientAnchor anchor = helper.createClientAnchor();
        anchor.setDx1(MSExcelUtil.pixel2WidthUnits(60));
        anchor.setDy1(MSExcelUtil.pixel2WidthUnits(60));
        anchor.setCol1(0);
        anchor.setRow1(4);
        anchor.setCol2(3);
        anchor.setRow2(25);
        drawing.createPicture(anchor, pictureIdx);
         
        //合并单元格
        CellRangeAddress region = new CellRangeAddress(0, // first row
                0, // last row
                0, // first column
                2 // last column
        );
        sheet.addMergedRegion(region);
         
        //创建表格之后设置行高与列宽
        for(int i = 0; i < datas.length; i++) {
            row = sheet.getRow(i);
            row.setHeightInPoints(30);
        }
        for(int j = 0; j < datas[0].length; j++) {
            sheet.setColumnWidth(j, MSExcelUtil.pixel2WidthUnits(160));
        }
        wb.write(new FileOutputStream("/Users/mike/table6.xls"));
    }    
}

package com.bs.web.rest;


import cn.hutool.core.util.ArrayUtil;
import com.bs.model.TodoPM;
import com.bs.service.impl.TodoPMServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;

/**
 * 导出excel表格
 * Created by Jxy on 2019/2/27 15:11
 */

@RestController
@Slf4j
@RequestMapping(value = "/excel")
public class ExcelResource {

    @Autowired
    TodoPMServiceImpl todoPMService;

    @GetMapping(value = "/download")
    public void downloadExcel(HttpServletResponse response) throws IOException {

        log.info(" ~~~generator Excel table ");
        /*
        建立excel表格
         */
        HSSFWorkbook hssfWorkbook = new HSSFWorkbook();
        /*
        建立工作簿
         */
        HSSFSheet sheet = hssfWorkbook.createSheet("project");
        /*
        读取数据库todoPM表所有信息
         */
        List<TodoPM> list = todoPMService.list();

        /*
        文件名称
         */
        String fileName = "信息化事业部研究所平台框架组项目跟踪一览表"  + ".xls";
        String gbk = new String(fileName.getBytes("gbk"), "iso8859-1");

        /*
        表头信息
         */
        String[] headers = { "项目名称", "创建人","负责人", "项目类型", "开始日期","交付日期","当前阶段","WIKI页面"};

        /*
        创建一行
         */
        HSSFRow row = sheet.createRow(0);
        row.setHeightInPoints(25f);//设置第一行高度
        HSSFCellStyle cellStyle1 = hssfWorkbook.createCellStyle();
        cellStyle1.setFillBackgroundColor(IndexedColors.LIGHT_ORANGE.getIndex());



        for (int i = 0; i < headers.length; i++) {


            HSSFCell cell = row.createCell(i);
            /*
            富文本字符串hssfRichTextString
             */
            HSSFRichTextString hssfRichTextString = new HSSFRichTextString(headers[i]);
            /*
            设置表头信息
             */
            cell.setCellValue(hssfRichTextString);
            cell.setCellStyle(cellStyle1);

        }

        /*
        创建样式
        格式化时间
         */
        HSSFCellStyle cellStyle = hssfWorkbook.createCellStyle();
        HSSFDataFormat dataFormat = hssfWorkbook.createDataFormat();
        short format = dataFormat.getFormat("yyyy-m-d");
        cellStyle.setDataFormat(format);

        /*
        填入数据
         */
        int num = 1;
        for (TodoPM todoPM : list) {
            HSSFRow row1 = sheet.createRow(num);
            row1.createCell(0).setCellValue(todoPM.getProjectName());
            row1.createCell(1).setCellValue(todoPM.getCreator());
            row1.createCell(2).setCellValue(todoPM.getProjectHead());
            row1.createCell(3).setCellValue(todoPM.getProjectType());
            HSSFCell cell4 = row1.createCell(4);
            cell4.setCellValue(todoPM.getStartDate());
            cell4.setCellStyle(cellStyle);
            HSSFCell cell5 = row1.createCell(5);
            cell5.setCellValue(todoPM.getReleaseDate());
            cell5.setCellStyle(cellStyle);

            row1.createCell(6).setCellValue(todoPM.getStage());
            row1.createCell(7).setCellValue(todoPM.getWikiUrl());
            num++;
        }
        response.setContentType("application/octet-stream");
        response.setHeader("Content-disposition", "attachment;filename=" + gbk);
        response.flushBuffer();
        hssfWorkbook.write(response.getOutputStream());
        hssfWorkbook.close();
    }

}