Springboot实现导出echarts图表

前端代码：

 exportDepData(){
      const aa = this.getBaseUrl()+`${ANASALARY}${EXPORTDATA+'dep'}?deptLevel=${this.depValue}`;
      window.location.href = aa;
    },

​

后端controller层的代码： 

    //导出数据
    @GetMapping("/exportDatadep")
    public void exportData(HttpServletResponse resp, String deptLevel
    ) throws IOException {

        //获取表格数据
        List tableParam = anaSalaryService.getDepParam(deptLevel);
        XSSFWorkbook wb = new XSSFWorkbook();
        String sheetName = "工资分析";
        XSSFSheet sheet = wb.createSheet(sheetName);
        //合并单元格
        CellRangeAddress rangeAddress = new CellRangeAddress(2, 2, 0, 3);
        sheet.addMergedRegion(rangeAddress);
        sheet.setColumnWidth(0,5000);
        CellStyle border = wb.createCellStyle();
        border.setBorderBottom(BorderStyle.THIN); //下边框
        border.setBorderLeft(BorderStyle.THIN);//左边框
        border.setBorderTop(BorderStyle.THIN);//上边框
        border.setBorderRight(BorderStyle.THIN);//右边框
        XSSFRow row = sheet.createRow(2);
        //创建单元格，指定起始列号，从0开始
        XSSFCell cell = row.createCell(0);
        //设置单元格内容
        cell.setCellValue("员工部门分析");
        CellStyle style = wb.createCellStyle();
        //设置背景色
        style.setFillForegroundColor(IndexColor.GREY_50_PERCENT);
        //字体居中
        style.setAlignment(HorizontalAlignment.CENTER);
        style.setVerticalAlignment(VerticalAlignment.CENTER);
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        cell.setCellStyle(style);
        CellStyle coll1Style = wb.createCellStyle();
        //字体居右
        coll1Style.setAlignment(HorizontalAlignment.CENTER);
        coll1Style.setBorderBottom(BorderStyle.THIN); //下边框
        coll1Style.setBorderLeft(BorderStyle.THIN);//左边框
        coll1Style.setBorderTop(BorderStyle.THIN);//上边框
        coll1Style.setBorderRight(BorderStyle.THIN);//右边框
        try {
            row = null;
            for (int i = 0; i < tableParam.size() + 1; i++) {
                if (row == null) {
                    row = sheet.createRow(3);
                    XSSFCell cell1 = row.createCell(0);
                    XSSFCell cell2 = row.createCell(1);
                    XSSFCell cell3 = row.createCell(2);
                    XSSFCell cell4 = row.createCell(3);
                    //设置标头
                    cell1.setCellValue("部门");
                    cell2.setCellValue("工资总额");
                    cell3.setCellValue("平均工资");
                    cell4.setCellValue("人数");
                    //设置边框
                    cell1.setCellStyle(border);
                    cell3.setCellStyle(coll1Style);
                    cell2.setCellStyle(coll1Style);
                    cell1.setCellStyle(coll1Style);
                    cell4.setCellStyle(coll1Style);
                } else {
                    int rowNum = row.getRowNum();
                    row = sheet.createRow(rowNum + 1);
                    AnaSalaryDepTable anaWorkAgeTable = tableParam.get(i - 1);
                    BigDecimal salarySum = anaWorkAgeTable.getSalarySum();
                    BigDecimal averageSalary = anaWorkAgeTable.getAverageSalary();
                    String salarysum = String.valueOf(salarySum);
                    String averagesalary = String.valueOf(averageSalary);
                    Double salary=0.0;
                    Double average=0.0;
                    if(salarysum!=null && !"null".equals(salarysum)){
                         salary = Double.valueOf(salarysum);
                    }
                    if(averagesalary!=null && !"null".equals(averagesalary)){
                        average = Double.valueOf(averagesalary);
                    }
                    XSSFCell cell1 = row.createCell(0);
                    cell1.setCellValue(anaWorkAgeTable.getDeptName());
                    XSSFCell cell2 = row.createCell(1);
                    cell2.setCellValue(anaWorkAgeTable.getCount());
                    XSSFCell cell3 = row.createCell(2);
                    cell3.setCellValue(salary);
                    XSSFCell cell4 = row.createCell(3);
                    cell4.setCellValue(average);
                    cell1.setCellStyle(border);
                    cell2.setCellStyle(border);
                    cell3.setCellStyle(border);
                    cell4.setCellStyle(border);
                }
            }
            //动态控制图表的大小
            int oneRowNum = sheet.getLastRowNum();
            int row2=0;
            int col2=0;
            if(oneRowNum<16){
                row2=17;
                col2=14;
            }else{
                row2=oneRowNum+1;
                col2=20;
            }
            //创建柱图
            ExcelUtil.createBarChart(sheet, 4, oneRowNum,
                    0, 0, 2, 2, 5, 2, col2, row2, "部门", "工资总额", "员工工资分析");
            ExcelUtil.downLoadExcel("工资分析", resp, wb);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }