apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/controller/ConfigsImportController.java/ConfigsImportController/importConfigByZipWithCoverConflictNamespace
class ConfigsImportController:  @PostMapping(value = "/configs/import", params = "conflictAction=cover")
  public void importConfigByZipWithCoverConflictNamespace(@RequestParam(value = "envs") String envs,
                                @RequestParam("file") MultipartFile file) throws IOException {

    List<Env>
        importEnvs =
        Splitter.on(ENV_SEPARATOR).splitToList(envs).stream().map(env -> Env.valueOf(env)).collect(Collectors.toList());

    byte[] bytes = file.getBytes();
    try (ZipInputStream zipInputStream = new ZipInputStream(new ByteArrayInputStream(bytes))) {
      configsImportService.importDataFromZipFile(importEnvs, zipInputStream, false);
    }
  }