1，使用场景

不用postman去测试接口。而是需要后台代码写在单元测试里。而传统的是根据单元测试用例去调用controller或者service（逻辑层代码）。如果有天发现，业务逻辑代码不见了。紧急需要调用接口，又没工具的情况下

请参考这个链接
http构建

2，模拟接口

1，get请求传参，header请求头校验。
2，post请求不传参，传对象。并且对象不是必须要传。不传对象时查询list所有。传对象requestbody里传。header请求头校验

3，远程接口调通

4，本地单元测试用例代码

做了小小处理因为EntityUtils。阿里巴巴的这个工具类有点坑。像toString方法一定走关闭流这个操作。导致get请求后无法再同一方法里掉post请求。
所以代码如下

package com.testfe;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.testfe.pojo.Student;
import org.apache.http.HttpEntity;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.io.*;


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

    /**
     * GET---有参测试 (方式一:手动在url后面加上参数)
     *
     * @date 2018年7月13日 下午4:19:23
     */
    @Test
    public void doGetTestWayTWO() {
        // 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();

        // 参数
        StringBuffer params = new StringBuffer();

        // post请求参数
        //这里编码

        /*try {*/
            // 字符数据最好encoding以下;这样一来，某些特殊字符才能传过去(如:某人的名字就是“&”,不encoding的话,传不过去)
           // params.append("name=" + URLEncoder.encode("&", "utf-8"));
            //params.append("&");
            params.append("id=1");
       /* } *//*catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        }*/


        // 创建Get请求
        HttpGet httpGet = new HttpGet("http://你的远程地址:8090/SSM/getId" + "?" + params);

        //创建Header
        httpGet.setHeader("Content-Type","text/cmd");
        httpGet.setHeader("Authorization","abcdefg");
        httpGet.setHeader("app","com.ljs.pass");
        // 响应模型
        CloseableHttpResponse response = null;
        try {
            // 配置信息
            RequestConfig requestConfig = RequestConfig.custom()
                    // 设置连接超时时间(单位毫秒)
                    .setConnectTimeout(5000)
                    // 设置请求超时时间(单位毫秒)
                    .setConnectionRequestTimeout(5000)
                    // socket读写超时时间(单位毫秒)
                    .setSocketTimeout(5000)
                    // 设置是否允许重定向(默认为true)
                    .setRedirectsEnabled(true).build();

            // 将上面的配置信息 运用到这个Get请求里
            httpGet.setConfig(requestConfig);

            // 由客户端执行(发送)Get请求
            try {
                response = httpClient.execute(httpGet);
            } catch (IOException e) {
                e.printStackTrace();
            }

            // 从响应模型中获取响应实体
            HttpEntity responseEntity = response.getEntity();
            System.out.println("get请求响应状态为:" + response.getStatusLine());
            if (responseEntity != null) {
                System.out.println("get请求响应内容长度为:" + responseEntity.getContentLength());
               byte[] bytes = EntityUtils.toByteArray(responseEntity);
                System.out.println("====未做处理==="+bytes.toString());
               /*
               因为EntityUtils中的toString源码。调用则关闭流。不能满足我接下来调用post请求，
               所以将它转为字节流。再转为字符串
                */

               /*
               调用字节输入流
                */
                ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
                InputStreamReader inputStreamReader = new InputStreamReader(byteArrayInputStream);
                BufferedReader br = new BufferedReader(inputStreamReader);
                String s = null;
                StringBuilder builder = new StringBuilder();
                while((s=br.readLine())!=null){
                    builder.append(s);
                }
                String result = builder.toString();
               System.out.println("get请求响应内容为:" + result );

                //第二个接口post请求
                // 创建Post请求
                HttpPost httpPost = new HttpPost("http://你的远程地址:8090/SSM/getall");

                /*
                拿到name =  “”的值
                 */
                JSONObject jsonObject = JSONObject.parseObject(result);

                String data = jsonObject.get("data").toString();
                JSONObject jsonObject1 = JSONObject.parseObject(data);
                String name = jsonObject1.get("name").toString();

                /*对象入参(可以传对象，参数也可不传)*/

                Student student = new Student();
                student.setName(name);
                String jsonString = JSON.toJSONString(student);
                StringEntity entity = new StringEntity(jsonString, "UTF-8");
                // post请求是将参数放在请求体里面传过去的;这里将entity放入post请求体中
                httpPost.setEntity(entity);
                //创建Header
                httpPost.setHeader("Content-Type","application/json");
                httpPost.setHeader("Authorization","abcdefg");
                httpPost.setHeader("app","com.ljs.pass");

                // 响应模型
                CloseableHttpResponse response2 = null;

                    // 由客户端执行(发送)Post请求
                    response2 = httpClient.execute(httpPost);
                    // 从响应模型中获取响应实体
                    HttpEntity responseEntity2 = response2.getEntity();


                    System.out.println("post响应状态为:" + response2.getStatusLine());
                    if (responseEntity2 != null) {
                        System.out.println("post响应内容长度为:" + responseEntity2.getContentLength());
                        System.out.println("post响应内容为:" + EntityUtils.toString(responseEntity2));
                    }

            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                // 释放资源
                if (httpClient != null) {
                    httpClient.close();
                }
                if (response != null) {
                    response.close();
                }

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}