Spring exchange file beetwen two REST

Question

我必须将一个文件从一个java类发送到一个Spring rest web服务。用例：从客户端，这可以选择服务器、服务器上的文件以及保存文件的位置。在服务器上，我必须检索文件（从客户机选择）并发送到客户机。目前我使用字节数组，但当文件超过50MB时，我会收到堆异常，而我将multipartfile从web页面发送到控制器，即使文件超过500MB，我也使用相同的方法。在客户端，我使用这个spring方法：

Response responseStatus = restTemplate.postForObject(serverIp + "ATS/client/file/?toStorePath={toStorePath}", responseSend, Response.class, toStorePath);

@Override
    @RequestMapping(value = "/file",produces=MediaType.APPLICATION_OCTET_STREAM, method = RequestMethod.GET)
    public javax.ws.rs.core.Response getAcquisition(@RequestParam(value="path", required = true) String path){
    try(InputStream is = new FileInputStream(path)){
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        int len;
        byte[] buffer = new byte[4096];
        while ((len = is.read(buffer, 0, buffer.length)) != -1) {
            baos.write(buffer, 0, len);
        }
        System.out.println("Server size: " + baos.size());
        return javax.ws.rs.core.Response.ok(baos).build();
    }catch(Exception e){
        ErrorResponse errorResponse= ErrorResponseBuilder.buildErrorResponse(e);
        LOG.error("Threw exception in MatlabClientControllerImpl::getAcquisition :" + errorResponse.getStacktrace());
        return null;
    }

@Override
    public Response getFile(String serverIp, String toStorePath, String filePath){
        FileOutputStream out = null;
        InputStream is = null;
        try{
            Client client = ClientBuilder.newClient();
            String url = serverIp + "ATS/client/file/";
            javax.ws.rs.core.Response response = client.target(url).queryParam("path",filePath).request().get();
            String location = toStorePath + "prova.zip";
            out = new FileOutputStream(location);
            is = (InputStream)response.getEntity();
            int len = 0;
            byte[] buffer = new byte[4096];
            while((len = is.read(buffer)) != -1) {
                out.write(buffer, 0, len);
            }
            return new Response(false, false,"Your required file has been correctly written!" , null);
        }catch(Exception e){
            ErrorResponse errorResponse= ErrorResponseBuilder.buildErrorResponse(e);
            LOG.error("Threw exception in FileServicesImpl::getFile :" + errorResponse.getStacktrace());
            return new Response(false, false,"Error while write file into local file system!" , errorResponse);
        }finally{
            try{
                if (out != null){
                    out.flush();
                    out.close();
                }
                if (is!=null)is.close();
            }catch (Exception e){
                ErrorResponse errorResponse= ErrorResponseBuilder.buildErrorResponse(e);
                LOG.error("Threw exception in FileServicesImpl::getFile :" + errorResponse.getStacktrace());
                return new Response(false, false,"Error during stream closeing!" , errorResponse);
            }
        }

这是服务器上的异常

dic 04,2015 5:00:54 PM org.apache.catalina.core.standardWrapperValve在路径[/ats]的上下文中为servlet[dispatcher]调用grave:servlet.service（）引发异常[请求处理失败；嵌套异常是org.thymeleaf.exceptions.templateInputException：错误解析模板“client/file”，模板可能不存在或无法被任何配置的模板解析器访问]根源是org.thymeleaf.exceptions.templateInputException：错误解析模板“client/file”，模板可能不存在或无法被templateEngine.process（templateEngine.java:1104)在org.thymeleaf.templateEngine.process（templateEngine.java:1060)在org.thymeleaf.templateEngine.process（templateEngine.java:1011)在org.thymeleaf.spring4.view.thymeleaf.renderFragment（thymeleafview.java:335)在org.thymeleaf.spring4.view.thymel在org.springframework.web.servlet.dispatcherservlet.render（dispatcherservlet.java:190)在org.springframework.web.servlet.dispatcherservlet.processDispatchResult（dispatcherservlet.java:1244)在org.springframework.web.servlet.dispatcherservlet.java:1027)在org.springframework.web.servlet.dispatcherservlet.doDispatch（let.doget(frameworkservlet.java:861)在javax.servlet.http.httpservlet.service(httpservlet.java:622)在org.springframework.web.servlet.frameworkservlet.service（frameworkservlet.java:846)在javax.servlet.http.httpservlet.java:729)在org.apache.catalina.core.applicationfilterchain.internaldoFilter（applicationfilterchain.java:20)在6）在org.apache.tomcat.websocket.server.wsfilter.doFilter(wsfilter.java:52)，在org.apache.catalina.core.applicationFilterChain.InternaldoFilter(applicationFilterChain.java:239)，在org.apache.catalina.core.applicationFilterChain.doFilter(applicationFilterChain.java:206)，在org.apache.catalina.core.standardWrapperValve.invoke authenticatorbase.invoke（authenticatorbase.java:502)在org.apache.catalina.core.standardhostvalve.invoke（standardhostvalve.java:142)在org.apache.catalina.valves.errorreportvalve.invoke（errorreportvalve.invoke（errorreportvalve.java:79)在org.apache.catalina.valves.abractAccessLogvalve.invoke（apache.coyote.http11.abstractHttp11proces在org.apache.coyote.abstractProtocol$abstractConnectionHandler.process(abstractProtocol.java:673)，在org.apache.tomcat.util.net.nioEndpoint$socketProcessor.dorun(NioEndpoint.java:1526)，在org.apache.tomcat.util.net.nioEndpoint$socketProcessor.run(NioEndpoint.java:1482)，在:617)在org.apache.tomcat.util.threads.taskthread$wrappingrunnable.run(taskthread.java:61)在java.lang.thread.run(thread.java:745)

Answer 1

500MB以上Rest。我不喜欢这个主意。

使用webservice只向您的文件发送一个下载链接，并让您的HTTP服务器（如Apache或NGINX）处理下载请求并提供文件。