远程调用单元测试+远程请求spring security获取令牌

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.util.Base64Utils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.DefaultResponseErrorHandler;
import org.springframework.web.client.RestTemplate;

import java.io.IOException;
import java.net.URI;
import java.util.Map;

@SpringBootTest
@RunWith(SpringRunner.class)
public class TestClient {

    @Autowired
    LoadBalancerClient loadBalancerClient;

    @Autowired
    RestTemplate restTemplate;

    //远程请求spring security获取令牌
    @Test
    public void testClient(){
        //从eureka中获取认证服务的一个实例的地址
        ServiceInstance serviceInstance = loadBalancerClient.choose("");
        //此地址就是http://ip:port
        URI uri = serviceInstance.getUri();
        //令牌申请的地址 http://localhost:40400/auth/oauth/token
        String authUrl = uri+ "/auth/oauth/token";
        //定义header
        LinkedMultiValueMap<String, String> header = new LinkedMultiValueMap<>();
		//outh_client_detail 数据库表中的client_id 和 密码
        String httpBasic = getHttpBasic("", "");
		//固定写法
        header.add("Authorization",httpBasic);

        //定义body
        LinkedMultiValueMap<String, String> body = new LinkedMultiValueMap<>();
		//固定写法
        body.add("grant_type","password");
		//账户名密码
        body.add("username","");
        body.add("password","");

        HttpEntity<MultiValueMap<String, String>> httpEntity = new HttpEntity<>(body, header);

        //设置restTemplate远程调用时候，对400和401不让报错，正确返回数据
        restTemplate.setErrorHandler(new DefaultResponseErrorHandler(){
            @Override
            public void handleError(ClientHttpResponse response) throws IOException {
                if(response.getRawStatusCode()!=400 && response.getRawStatusCode()!=401){
                    super.handleError(response);
                }
            }
        });

        ResponseEntity<Map> exchange = restTemplate.exchange(authUrl, HttpMethod.POST, httpEntity, Map.class);

        //申请令牌信息
        Map bodyMap = exchange.getBody();
        System.out.println(bodyMap);
    }

    //获取httpbasic的串
    private String getHttpBasic(String clientId,String clientSecret){
        String string = clientId+":"+clientSecret;
        //将串进行base64编码
        byte[] encode = Base64Utils.encode(string.getBytes());
		//固定写法 Basic+空格+Base64加密以后的clientId+":"+clientSecret
        return "Basic "+new String(encode);
    }

}