Springboot实现前后端分离excel下载

目录

• Springboot前后端分离excel下载
• 前后端分离Excle下载乱码问题
• 前端请求方式 : ajax请求

Springboot前后端分离excel下载

现在公司的技术栈是springboot作为后端，前端是vue， 现在要做excel的导出功能， 之前没做过，写一下记录下.

springboot版本是2.0.6 poi 3.14 ,jdk1.8

类上面的注解是： @RestController

/**
     * 导出excel
     * 
     */
    @GetMapping(\"export\")
    public void exportExcel() {
        XSSFWorkbook workbook = placeStatService.exportExcel();
        // 设置生成的Excel的文件名，并以中文进行编码
        String fileName = null;
        try {
            fileName = URLEncoder.encode(\"房间预约使用统计表\" + \".xlsx\", \"utf-8\").replaceAll(\"\\\\+\", \"%20\");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        response.setCharacterEncoding(\"UTF-8\");
        response.setHeader(\"Content-type\", \"application/vnd.ms-excel\");
        response.setHeader(\"Content-Disposition\", \"attachment;filename=\" + fileName);
        // 响应类型,编码
        response.setContentType(\"application/octet-stream;charset=UTF-8\");
        try {
            // 形成输出流
            OutputStream osOut = response.getOutputStream();
            // 将指定的字节写入此输出流
            workbook.write(osOut);
            // 刷新此输出流并强制将所有缓冲的输出字节被写出
            osOut.flush();
            // 关闭流
            osOut.close();
            workbook.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

@Override
    public XSSFWorkbook exportExcel) {
        List<RoomOrderDetailModel> roomOrdersList = getRoomOrderList();
        XSSFWorkbook data = ExcelUtil.setExcelData(roomOrdersList);
        return data;
    }
 

package com.util; 
import com.curefun.place.model.RoomOrderDetailModel;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook; 
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
 
/**
 * @author excel 工具类. 导出功能
 */
public class ExcelUtil { 
 
    /**
     * 数据导出, 获取一个excel对象
     *
     * @param
     */
    public static XSSFWorkbook setExcelData(List<RoomOrderDetailModel> orderDetailModels) {
        //创建一个book，对应一个Excel文件
        XSSFWorkbook workbook = new XSSFWorkbook();
        //在book中添加一个sheet,对应Excel文件中的sheet
        XSSFSheet sheet = workbook.createSheet(\"教室预约使用记录\");
        //设置六列的宽度
        sheet.setColumnWidth(0, 4000);
        sheet.setColumnWidth(1, 3000);
        sheet.setColumnWidth(2, 3800);
        sheet.setColumnWidth(3, 2800);
        sheet.setColumnWidth(4, 3200);
        sheet.setColumnWidth(5, 3600);
        sheet.setColumnWidth(6, 2850);
 
        //居中的样式
        XSSFCellStyle centerStyle = getCenterStyle(workbook);
 
        // 第三步，在sheet中添加表头第0行
        XSSFRow row0 = sheet.createRow(0);
        setFirstRow(centerStyle, row0);
 
        int rowNum = 1;
        for (RoomOrderDetailModel model : orderDetailModels) {
            XSSFRow row = sheet.createRow(rowNum);
            row.createCell(0).setCellValue(rowNum);
            rowNum++;
            row.createCell(1).setCellValue(model.getBuildingName());
            row.createCell(2).setCellValue(model.getRoomNo());
            row.createCell(3).setCellValue(model.getRoomName());
            row.createCell(4).setCellValue(model.getEventType());
            row.createCell(5).setCellValue(model.getEventName());
            row.createCell(6).setCellValue(model.getUserRealName());
        }
        return workbook;
    }  
 
    /**
     * 获取居中的样式.
     *
     * @param workbook
     * @return
     */
    private static XSSFCellStyle getCenterStyle(XSSFWorkbook workbook) {
        XSSFCellStyle cellStyle = workbook.createCellStyle();
        //设置水平对齐的样式为居中对齐;
        cellStyle.setAlignment(HorizontalAlignment.CENTER);
        //垂直居中
        cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
        return cellStyle;
    } 
 
    /**
     * 设置第一行的表头
     *
     * @param centerStyle
     * @param row
     */
    private static void setFirstRow(XSSFCellStyle centerStyle, XSSFRow row) {
        XSSFCell cell0 = row.createCell(0);
        cell0.setCellValue(\"序号\");
        cell0.setCellStyle(centerStyle);
        XSSFCell cell1 = row.createCell(1);
        cell1.setCellValue(\"楼栋信息\");
        cell1.setCellStyle(centerStyle);
        XSSFCell cell2 = row.createCell(2);
        cell2.setCellValue(\"房号\");
        cell2.setCellStyle(centerStyle);
        XSSFCell cell3 = row.createCell(3);
        cell3.setCellValue(\"房间名称\");
        cell3.setCellStyle(centerStyle);
        XSSFCell cell4 = row.createCell(4);
        cell4.setCellValue(\"活动类型\");
        cell4.setCellStyle(centerStyle);
        XSSFCell cell5 = row.createCell(5);
        cell5.setCellValue(\"活动名称\");
        cell5.setCellStyle(centerStyle);
        XSSFCell cell6 = row.createCell(6);
        cell6.setCellValue(\"使用人\");
        cell6.setCellStyle(centerStyle); 
/**
其实完全使用这种方式, 会更加的简单,便于修改
List<String> title = Stream.of(\"序号\", \"专业\", \"班级\", \"课程名称\", \"课程内容\", \"授课教师\", \"授课时长\", \"授课时间\", \"学分\", \"授课房间\")
                .collect(Collectors.toList());
        for (int i = 0; i < title.size(); i++) {
            XSSFCell cell = row.createCell(i);
            cell.setCellValue(title.get(i));
            cell.setCellStyle(centerStyle);
        }
*/
    } 
}

其实使用很简单，就是excel的文件名需要进行编码，这个需要注意，其他没啥的了.

前后端分离Excle下载乱码问题

前端：vue+elementUI

后端：springCloud

前端请求方式 : ajax请求

this.$.ajax({
                url :this.url + \"/\",
                type : \'post\',
                data : formData,
                contentType: false,
                processData: false,
                xhrFields: {withCredentials: true, responseType:\'arraybuffer\'},
                headers : {\'Access-Control-Allow-Origin\': \'*\', \"Authorization\": this.ajaxRequest.getToken()},
                success: function (res, textStatus, request) {
                    var downloadFile = document.createElement(\'a\');
                    let blob = new Blob([res], {type : \"application/vnd.ms-excel;charset=UTF-8\"});
                    downloadFile.href = window.URL.createObjectURL(blob);
                    console.log(request.getResponseHeader(\'Content-disposition\'));
                    downloadFile.download = 
                    decodeURI(request.getResponseHeader(\'Content-disposition\').split(\'filename=\')[1] );
                    downloadFile.click();
                    window.URL.revokeObjectURL(downloadFile.href);
                },
                error : function (res) {
                  console.log(res)
                }
        })

后端处理：导出文件处理

// 输出Excel文件
OutputStream out = null;
out = response.getOutputStream();
response.reset();
response.setCharacterEncoding(\"UTF-8\");
response.setHeader(\"Content-disposition\", \"attachment;filename=\" + URLEncoder.encode(fileName, \"UTF8\"));
response.setContentType(\"application/vnd.ms-excel; charset=utf-8\");
// 输出Excel内容，生成Excel文件
wb.write(out);

以上为个人经验，希望能给大家一个参考，也希望大家多多支持。