springboot文件上传

1.前端，resources下的static新建file.html页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/upload/image" method="post" enctype="multipart/form-data">
    2      <input type="file" name="file" /><p>
    3      <input type="submit" value="提交" /><p>
    4      <input type="reset" value="清空" /><p>
    5 </form>
</body>
</html>

2.springboot配置

server:
  port: 8090
spring:
  servlet:
    multipart:
      max-file-size: 1MB

3.新建controller

/**
 * 在上传文件过程中，我们需要对上传的内容进行校验：
 *
 * 校验文件大小
 * 校验文件的媒体类型
 * 校验文件的内容
 */
@RestController
public class FileController {
    private static final List<String> CONTENT_TYPES = Arrays.asList("image/jpg","image/jpeg", "image/png");
    @PostMapping("/upload/image")
    public String uploadFile(@RequestParam("file")MultipartFile file) throws IOException {
        String originalFilename = file.getOriginalFilename();
        String type = file.getContentType();
        System.out.println(type);
        if (!CONTENT_TYPES.contains(type)){
            return "图片格式不正确";
        }
        if (ImageIO.read(file.getInputStream())==null){
            return "图片内容不能为空";
        }
        String f = "C:\\Download\\"+ UUID.randomUUID()+originalFilename.substring(originalFilename.lastIndexOf("."));
        file.transferTo(new File(f));
        return "上传成功";
    }
}


posted @ 2020-07-29 20:56  z街角的风铃y  阅读(153)  评论(0)    收藏  举报