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自由互联。
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