因为我们做的是前后端分离项目 无法采用response.write直接将文件流写出
我们采用阿里云oss 进行保存 再返回的结果对象里面保存我们的文件地址
废话不多说，上代码
Springboot
第一步导入poi相关依赖
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>4.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>4.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>4.1.2</version>
</dependency>
第二步编写批量导出api
student对象
@Data
public class StudentDto {
@JsonDeserialize(using = LongJsonDeserializer.class)
@JsonSerialize(using = LongJsonSerializer.class)
private Long id;
private String name;
private String studentId;
private String collegename;
private int collegeId;
private int classId;
private String classname;
private Integer role;
private String email;
private String phone;
}
阿里云oss文件上传的service（不会使用阿里云oss的可以查看 https://www.cnblogs.com/jydm/p/14745418.html）
@Override
public String uploadFileXlsx(InputStream inputStream, String own,String fileName) throws Exception {
OSS ossClient = OssUtil.getossClient();
//这里最好对文件路径或名字做一下处理，防止文件名或路径重复导致文件丢失或者被覆盖
String url ="pm/"+own+"/"+fileName+".xlsx";
//上传
ossClient.putObject(OssProperies.BUCKET_NAME, url, inputStream);
// 关闭OSSClient。
ossClient.shutdown();
return "https://"+OssProperies.BUCKET_NAME+"."+OssProperies.END_POINT+"/"+url;
}
Controller
@ApiOperation("导出学生信息")
@PostMapping("/exportStudents")
@RequiresRoles("admin")
public Result exportStudents(@RequestBody String students){
//将前端传递的json数据转换为对象数组
JSONObject jsonObject = JSONObject.parseObject(students);
List<StudentDto> studentDtos = JSONObject.parseArray(jsonObject.getJSONArray("students").toJSONString(), StudentDto.class);
//创建excel工作表
Workbook workbook =new XSSFWorkbook();
Sheet studentsheet = workbook.createSheet("学生信息表");
Row row = studentsheet.createRow(0);
String[] title= {"学号","姓名","学院","班级","电话","邮箱"};
for (int i = 0; i < 6; i++) {
Cell cell = row.createCell(i);
cell.setCellValue(title[i]);
}
for (int i = 1; i < studentDtos.size()+1; i++) {
StudentDto studentDto = studentDtos.get(i - 1);
Row row1 = studentsheet.createRow(i);
Cell cell0 = row1.createCell(0);
cell0.setCellValue(studentDto.getStudentId());
Cell cell1 = row1.createCell(1);
cell1.setCellValue(studentDto.getName());
Cell cell2 = row1.createCell(2);
cell2.setCellValue(studentDto.getCollegename());
Cell cell3 = row1.createCell(3);
cell3.setCellValue(studentDto.getClassname());
Cell cell4 = row1.createCell(4);
cell4.setCellValue(studentDto.getPhone());
Cell cell5 = row1.createCell(5);
cell5.setCellValue(studentDto.getEmail());
}
InputStream excelStream = null;
String path=null;
try {
//这里就是io流的转换 WorkBook需要写入一个输出流 阿里云oss保存文件需要一个输入流
ByteArrayOutputStream out = new ByteArrayOutputStream();
workbook.write(out);
out.close();
excelStream= new ByteArrayInputStream(out.toByteArray());
workbook.close();
path = fileService.uploadFileXlsx(excelStream, "admin", "学生信息表");
} catch (Exception e) {
e.printStackTrace();
}
HashMap<Object, Object> map = new HashMap<>();
map.put("url",path);
return Result.succ(map);
}
这样我们就返回给前端我们的一个文件地址
vue前端处理
我们请求完成之后可以设置一个弹出框 询问用户是否需要下载 然后将 window.location.href 指向我们的文件地址
或者请求结果返回为请求成功，直接将window.location.href 指向我们的文件地址
async exportExcel(){
const{data:res}=await this.$axios.post("/student/exportStudents",{students:this.multipleSelection})
console.log(res)
if(res.code==200){
this.$confirm('导出成功,是否下载到电脑', '提示', {
confirmButtonText: '确定',
cancelButtonText: '取消',
type: 'success'
}).then(() => {
window.location.href=res.data.url
}).catch(() => {
this.$message({
type: 'info',
message: '已取消'
});
});
}
}
这样我们就实现了 springboot+vue前后端分离项目 批量导出功能