Contenty类型的边界被FormHttpMessageConverter覆盖

在Spring启动中，您可以通过创建新的HttpMessageConverter bean来自定义边界。Spring Boot将自动替换旧的靴子。代码如下：

@Configurationpublic class CustomerHttpMessageConverter {    public static final String MY_BOUNDARY = "XXXXXXXX";    @Bean    public HttpMessageConverter<MultiValueMap<String, ?>> createCustomerFormHttpMessageConverter() {        return new CustomerFormHttpMessageConverter();    }    static class CustomerFormHttpMessageConverter extends FormHttpMessageConverter {        @Override        protected byte[] generateMultipartBoundary() { return MY_BOUNDARY.getBytes(Charset.forName("UTF-8"));        }    }}

您可以在此处找到更多信息。