spring boot+uniapp上传单个文件

后端代码:文件上传位置为/static/photo目录下

@PostMapping("save")
public int savePicture(@RequestParam("file")MultipartFile file,@RequestParam("id")String id) throws IOException {

        //如果文件不存在上传失败
        if (file.isEmpty()) {
            System.out.println("文件不存在");
           return 0;
        }
        //获取文件名字
        String fileName = file.getOriginalFilename();
        //设置编译后文件存在路径
        String path = ClassUtils.getDefaultClassLoader().getResource("").getPath()+"static/photo/";
        //获取项目路径
        File directory = new File("src/main/resources/static/photo");
        String paths = directory.getCanonicalPath();

        File dest = new File(paths+'/' + fileName);
        System.out.println(dest.getAbsoluteFile());

        FileInputStream fileInputStream = (FileInputStream) file.getInputStream();
        //以流的方式上传
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(path + File.separator + fileName));
        byte[] bs = new byte[1024];
        int len;
        while ((len = fileInputStream.read(bs)) != -1) {
            bos.write(bs, 0, len);
        }
        bos.flush();
        bos.close();

        try {
            //文件上传
            file.transferTo(dest);
            return 1;
        } catch (IOException e) {
      }


        return 1;
}

前端代码为

<template>
	<view class="container">
		<view>首页</view>
		<view>上传文件测试</view>
		<button type="primary" @click="uploadFile">点击上传文件</button>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				id:"20181008093"
			}
		},
		
		methods: {
			uploadFile(){
				var _this=this;
				uni.chooseImage({
					success(res) {
						console.log(res)
						var tempFilePath=res.tempFilePaths;
						uni.uploadFile({
							url:'http://localhost:9000/save',
							filePath:tempFilePath[0],
							name:"file",
							formData:{
								"id":_this.id
							},
							
							success(res) {
								console.log(res.data)
							}
						})
					}
				})
			}
		}
	}
</script>

<style>
	.container {
		padding: 20px;
		font-size: 14px;
		line-height: 24px;
	}
</style>

```html