springboot 上传文件，MultipartFile为null

上传文件

1. 排除MultipartAutoConfiguration

@SpringBootApplication (exclude = {MultipartAutoConfiguration.class})

2. 添加MultipartResolver

//显示声明CommonsMultipartResolver为mutipartResolver
    @Bean(name = "multipartResolver")
    public MultipartResolver multipartResolver() {
        CommonsMultipartResolver resolver = new CommonsMultipartResolver();
        resolver.setDefaultEncoding("UTF-8");
        //resolveLazily属性启用是为了推迟文件解析，以在在UploadAction中捕获文件大小异常
        resolver.setResolveLazily(true);
        resolver.setMaxInMemorySize(40960);
        //上传文件大小 5M 5*1024*1024
        resolver.setMaxUploadSize(5 * 1024 * 1024);
        return resolver;
    }

3. 添加@RequestParam

@PostMapping("/upload")
    public ApiResponse upload(@RequestParam("file") MultipartFile multipartFile) {
     // other code ...
    }

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最后编辑时间为: 2019/06/25 17:03