使用RestTemplate大文件上传,总失败

使用RestTemplate大文件上传,总失败

环境：

jdk 1.8

springboot v2.2.1.RELEASE

配置：

nginx配置

#参数大小
client_max_body_size 2048M
#超时时间
proxy_connect_timeout    600;
proxy_read_timeout       600;
proxy_send_timeout       600;

项目配置文件配置内容

#单个文件的最大上限
spring.servlet.multipart.max-file-size = 2048MB
#单个请求的文件总大小上限
spring.servlet.multipart.max-request-size=2048MB

依然报错

添加配置类配置restTemplate

@Configuration
public class RestTemplateConfig {
    @Bean
    public RestTemplate restTemplate(ClientHttpRequestFactory factory) {
        RestTemplate restTemplate = new RestTemplate(factory);
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
        restTemplate.getMessageConverters().add(new ByteArrayHttpMessageConverter());
        restTemplate.getMessageConverters().add(new ResourceHttpMessageConverter());
        return restTemplate;
    }

    @Bean
    public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        //请求工厂类是否应用缓冲请求正文内部，默认值为true，
        // 当post或者put大文件的时候会造成内存溢出情况，设置为false将数据直接流入底层HttpURLConnection。
        factory.setBufferRequestBody(false);
        factory.setConnectTimeout(150000);
        factory.setReadTimeout(150000);
        return factory;
    }
}

代码中设置： factory.setBufferRequestBody(false);

该代码的意思是请求工厂类是否应用缓冲请求正文内部，默认值为true，当post或者put大文件的时候会造成内存溢出情况，设置为false将数据直接流入底层HttpURLConnection。

源码：

/**
     * Indicate whether this request factory should buffer the
     * {@linkplain ClientHttpRequest#getBody() request body} internally.
     * <p>Default is {@code true}. When sending large amounts of data via POST or PUT,
     * it is recommended to change this property to {@code false}, so as not to run
     * out of memory. This will result in a {@link ClientHttpRequest} that either
     * streams directly to the underlying {@link HttpURLConnection} (if the
     * {@link org.springframework.http.HttpHeaders#getContentLength() Content-Length}
     * is known in advance), or that will use "Chunked transfer encoding"
     * (if the {@code Content-Length} is not known in advance).
     * @see #setChunkSize(int)
     * @see HttpURLConnection#setFixedLengthStreamingMode(int)
     */
    public void setBufferRequestBody(boolean bufferRequestBody) {
        this.bufferRequestBody = bufferRequestBody;
    }