使用代码上传文件示例

public Map<String, Object> sendGrantToCrm(String custNo, String cardNo, String path, String fileName) {

        FileSystemResource fileSystemResource = new FileSystemResource(path + fileName);
        MultiValueMap<String, Object> paramMap = new LinkedMultiValueMap<>();
        Map<String, Object> resultMap = new HashMap<>();
        try {
            InputStream is = new BufferedInputStream(new FileInputStream(path + fileName));
            String md5 = DigestUtils.md5Hex(IOUtils.toByteArray(is));
            IOUtils.closeQuietly(is);

            String crmUrl = EurekaServer.CRM + "/app/crm/cust/arch/upload?custNo=" + custNo
                    + "&cardNo=" + cardNo + "&archType=1" + "&fileName=" + fileName + "&md5=" + md5;
            HttpHeaders headers = new HttpHeaders();
            paramMap.add("file", fileSystemResource);
            HttpEntity<MultiValueMap<String, Object>> httpEntity = new HttpEntity<>(paramMap, headers);
            ResponseEntity entity = restTemplate.exchange(crmUrl, HttpMethod.POST, httpEntity, Map.class);
            Map<String, Object> crmRetMap = (Map<String, Object>) entity.getBody();
            logger.info("授权书发送CRM:entity=" + crmRetMap);

            if (!"00000".equals(((Map<String, Object>) crmRetMap.get("head")).get("retFlag"))) {
                resultMap.put("retCod", "00001");
                resultMap.put("retMsg", ((Map<String, Object>) entity.getBody()).get("retMsg"));
                return resultMap;
            }
        } catch (Exception e) {
            logger.error("文件上传CRM异常!" + e.getMessage());
            resultMap.put("retCod", "00002");
            resultMap.put("retMsg", "文件上传CRM异常!");
            return resultMap;
        }
        resultMap.put("retCod", "00000");
        return resultMap;
    }