springboot上传文件(单文件和多文件)(不是ajax上传)

原创

chushiyunaaa 2023-02-28 06:58:11 博主文章分类：java ©著作权

文章标签 文件名 java代码上传 文章分类 HarmonyOS 后端开发

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springboot上传文件比较简单，直接看例子。

单文件上传

页面的形式

页面代码:

<form action="/upload" method="POST" enctype="multipart/form-data">
    <input type="file" name="file"/>
    <input type="submit" value="上传">
</form>

java代码：

@RestController
public class UploadController {
   @RequestMapping(value = "/upload",method = RequestMethod.POST,consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
   public String fileUpload(@RequestParam("file") MultipartFile file) throws IOException {
        System.out.println(file.getOriginalFilename());
        File covertFile = new File("d:/" + file.getOriginalFilename());
        covertFile.createNewFile();
        FileOutputStream fout = new FileOutputStream(covertFile);
        fout.write(file.getBytes());
        fout.close();
        return "file is upload successfully";
   }
}

一个文件+一个参数

@RequestMapping(value = "/uploads",method = RequestMethod.POST,consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public String fileUploads(@RequestParam("file") MultipartFile file [],@RequestParam("uid") String uid ) throws IOException {
    for (String uid: uids) {
        logger.info("uid：{}",uid);
    }
    logger.info("length：{}",uids.length);
    for (MultipartFile file: files) {

        String originalFilename = file.getOriginalFilename();
        logger.info("originalFilename：{}",originalFilename);
        File covertFile = new File("d:/" + file.getOriginalFilename());
        covertFile.createNewFile();
        FileOutputStream fout = new FileOutputStream(covertFile);
        fout.write(file.getBytes());
        fout.close();
    }
    return "file is upload successfully";
}

多文件+参数列表

@RequestMapping(value = "/uploads",method = RequestMethod.POST,consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public String fileUploads(@RequestParam("files") MultipartFile files [],@RequestParam("uids") String[] uids ) throws IOException {
    for (String uid: uids) {
        logger.info("uid：{}",uid);
    }
    logger.info("length：{}",uids.length);
    for (MultipartFile file: files) {

        String originalFilename = file.getOriginalFilename();
        logger.info("originalFilename：{}",originalFilename);
        File covertFile = new File("d:/" + file.getOriginalFilename());
        covertFile.createNewFile();
        FileOutputStream fout = new FileOutputStream(covertFile);
        fout.write(file.getBytes());
        fout.close();
    }
    return "file is upload successfully";
}