java实现文件上传（包含多文件上传）

小灰灰 2024-04-18 20:06 86阅读 0赞

*  页面

*  控制器

@RequestMapping("/DuoFile")
    @ResponseBody
        public String dataPicAdd(@RequestParam(value = "submit",required = false) String submit,
                                 @RequestParam(value = "img",required = false) List<MultipartFile> uploadImage,
                                 Model model)  throws Exception{ 
            System.out.println("DuoFile:");
            String facePath = null;
            if (submit!=null) { 
                System.out.println("图片数量："+uploadImage.size());
                JSONObject json = new JSONObject();
                if (uploadImage == null) { 
                    return "上传失败，上传图片数据为空";
                } else { 
                    for (int i=0;i<uploadImage.size();i++){ 
                        String suffix = uploadImage.get(i).getContentType().toLowerCase();//图片后缀，用以识别哪种格式数据
                        suffix = suffix.substring(suffix.lastIndexOf("/") + 1);
    
                        if (suffix.equals("jpg") || suffix.equals("jpeg") || suffix.equals("png") || suffix.equals("gif")) { 
                            String fileName = UUID.randomUUID().toString().replaceAll("-", "") + "." + suffix;
                            //保存路径
                            String imgFilePath = ClassUtils.getDefaultClassLoader().getResource("").getPath() + "static/images";
                            File targetFile = new File(imgFilePath, fileName);
                            if (!targetFile.getParentFile().exists()) {  //判断父级路径是否存在
                                targetFile.getParentFile().mkdirs();//创建目录
                            }
                            //保存
                            uploadImage.get(i).transferTo(targetFile);
                            String sTestsetFile = facePath;
                           return"上传图片成功";
                        } else { 
                            return "上传图片格式非法";
                        }
                    }
                }
            }
        }

*  maven

<dependency>
       <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>2.4</version>
        <classifier>jdk15</classifier>
    </dependency>
    <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

小白一枚，遇到问题，欢迎评论