使用RestTemplate大文件上傳,總失敗

使用RestTemplate大文件上傳,總失敗

環境：

jdk 1.8

springboot v2.2.1.RELEASE

配置：

nginx配置

#參數大小
client_max_body_size 2048M
#超時時間
proxy_connect_timeout    600;
proxy_read_timeout       600;
proxy_send_timeout       600;

項目配置文件配置內容

#單個文件的最大上限
spring.servlet.multipart.max-file-size = 2048MB
#單個請求的文件總大小上限
spring.servlet.multipart.max-request-size=2048MB

依然報錯

添加配置類配置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();
        //請求工廠類是否應用緩沖請求正文內部，默認值為true，
        // 當post或者put大文件的時候會造成內存溢出情況，設置為false將數據直接流入底層HttpURLConnection。
        factory.setBufferRequestBody(false);
        factory.setConnectTimeout(150000);
        factory.setReadTimeout(150000);
        return factory;
    }
}

代碼中設置： factory.setBufferRequestBody(false);

該代碼的意思是請求工廠類是否應用緩沖請求正文內部，默認值為true，當post或者put大文件的時候會造成內存溢出情況，設置為false將數據直接流入底層HttpURLConnection。

源碼：

/**
     * 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;
    }