Spring RestTemplate GET与参数

为了轻松地操纵URL / path / params /等等，可以使用Spring的UriComponentsBuilder类。手动连接字符串比较干净，它会为你处理URL编码：

HttpHeaders headers = new HttpHeaders();headers.set("Accept", MediaType.APPLICATION_JSON_VALUE);UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url)        .queryParam("msisdn", msisdn)        .queryParam("email", email)        .queryParam("clientVersion", clientVersion)        .queryParam("clientType", clientType)        .queryParam("issuerName", issuerName)        .queryParam("applicationName", applicationName);HttpEntity<?> entity = new HttpEntity<>(headers);HttpEntity<String> response = restTemplate.exchange(        builder.toUriString(),         HttpMethod.GET,         entity,         String.class);