使用restTemplate发送带header的get请求

• 首先贴一段网友的代码：

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;

HttpHeaders headers = new HttpHeaders();
headers.add("token", "123");
ResponseEntity response = restTemplate.exchange(rootUrl + "get4", HttpMethod.GET, new HttpEntity(headers), String.class);
System.out.println("设置header的Get请求:" + response.getBody());

• 改造，使其适用我自己的需求，需求是 调用harbor的api，获取镜像列表。这需要使用header传递账户信息，使其有权限访问harbor。

实体类如下：

/**
 * @Auther: 
 * @Date: 2020/5/20
 * @Description:
 */

import com.fasterxml.jackson.annotation.JsonAnyGetter;
import com.fasterxml.jackson.annotation.JsonAnySetter;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonPro