当你在这个问题上花费了数小时而解决不了，你才会知道这篇文章对你的帮助

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.Resource;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.util.StreamUtils;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriComponentsBuilder;import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;public class Test {@AutowiredRestTemplate restTemplate;public void test(HttpServletResponse response) {String serverPrefix = "http://aa.com:8080";String filePath = "/testo1/test2/測武特殊字付@#&$％^～+［】・副本一副本・pom";HttpHeaders headers = new HttpHeaders();headers.add("Authorization", "Auth");URI uri = UriComponentsBuilder.fromHttpUrl(serverPrefix).pathSegment(filePath.split("/")).build().encode().toUri();ResponseEntity<Resource> responseEntity = restTemplate.exchange(uri, HttpMethod.GET, new HttpEntity<>(headers), Resource.class);if (responseEntity.getStatusCode().is2xxSuccessful() && responseEntity.hasBody()) {try (InputStream input = responseEntity.getBody().getInputStream();OutputStream output = response.getOutputStream()) {StreamUtils.copy(input, output);response.setContentLengthLong(responseEntity.getBody().contentLength());} catch (IOException e) {throw new RuntimeException("流传输异常", e);}} else {throw new RuntimeException("请求失败：" + responseEntity.getStatusCode());}}
}