直接 Http 调用的时候出现了异常，异常信息如下：
Caused by: java.net.MalformedURLException: unknown protocol: xxxxxxxxxx
at java.net.URL.<init>(URL.java:600)
at java.net.URL.<init>(URL.java:490)
at java.net.URL.<init>(URL.java:439)
at java.net.URI.toURL(URI.java:1089)
at org.springframework.http.client.SimpleClientHttpRequestFactory.createRequest(SimpleClientHttpRequestFactory.java:137)
at org.springframework.http.client.support.HttpAccessor.createRequest(HttpAccessor.java:77)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:592)信息很明显，没有协议，那么就需要加上协议：
request.getScheme()