如何通过RestTemplate上传大文件？

Question

我从用户那里获取了一个 MultipartFile，并通过 RestTemplate 将其重新发送到 API。但如果文件大小大于 2gb，我会得到 ArrayIndexOutOfBoundsException

---

java.lang.ArrayIndexOutOfBoundsException: arraycopy: last destination index 2147468288 out of bounds for byte[1819689347]
at java.base/java.lang.System.arraycopy(Native Method) ~[na:na]
at org.springframework.util.FastByteArrayOutputStream.resize(FastByteArrayOutputStream.java:299) ~[spring-core-6.1.8.jar:6.1.8]
at org.springframework.util.FastByteArrayOutputStream.toByteArrayUnsafe(FastByteArrayOutputStream.java:215) ~[spring-core-6.1.8.jar:6.1.8]
at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:44) ~[spring-web-6.1.8.jar:6.1.8]
at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:66) ~[spring-web-6.1.8.jar:6.1.8]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:889) ~[spring-web-6.1.8.jar:6.1.8]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:790) ~[spring-web-6.1.8.jar:6.1.8]

发送请求的方法：

protected String postFileRestTemplate(String addToBaseURL,
                                          InputStreamResource inputStreamResource) {

       restTemplate.setInterceptors(Collections.singletonList(new LoggingInterceptor()));

        httpHeaders.setContentType(MediaType.MULTIPART_FORM_DATA);

        MultipartBodyBuilder builder = new MultipartBodyBuilder();
        builder.part("content", "iso");
        builder.part("filename", inputStreamResource);

        MultiValueMap<String, HttpEntity<?>> build = builder.build();
        HttpEntity<Object> objectHttpEntity = new HttpEntity<>(build, httpHeaders);

        ResponseEntity<String> exchange = restTemplate.postForEntity(
                baseURL + addToBaseURL,
                objectHttpEntity,
                String.class);

        log.info(exchange.getBody());
        return exchange.getBody();

    }

我还编写了 LoggingInterceptor，它什么也不做，我需要检查标题，但如果我删除它。我收到“501 不支持分块传输编码”我不知道为什么会发生。

  public class LoggingInterceptor implements ClientHttpRequestInterceptor {


    @Override
    public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
        ClientHttpResponse response = execution.execute(request, body);
        return response;
    }

我尝试在网上查找信息，但没有找到任何方法。

Answer 1

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

   @Configuration
   public class AppConfig {
         @Bean
        public RestTemplate restTemplate() {
           return new RestTemplate();
  }

}