spring boot 上传图片报错Unable to process parts as no multi-part configuration has been provided

spring boot 2.0 设置多个DispatcherServlet上传图片出现错误Unable to process parts as no multi-part configuration has been provided,原因是自定义的servlet没有定义MultipartConfig,在对应的servlet注入就可以了

@Autowired
private MultipartConfigElement multipartConfigElement;

@Bean
    public ServletRegistrationBean backServlet() {
        DispatcherServlet dispatcherServlet = new DispatcherServlet();
        AnnotationConfigWebApplicationContext applicationContext = new AnnotationConfigWebApplicationContext();
        applicationContext.scan("xxx");
        applicationContext.register(BackServletConfig.class);
        dispatcherServlet.setApplicationContext(applicationContext);
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(dispatcherServlet, "/*");
        servletRegistrationBean.setLoadOnStartup(1);
        servletRegistrationBean.setMultipartConfig(multipartConfigElement);
        servletRegistrationBean.setName("back");
        return servletRegistrationBean;
    }

参考文章:https://blog.csdn.net/m0_37893932/article/details/79665148

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