测试

package ljj;
import ljj.entity.Customer;

import ljj.mapper.CustomerMapper;

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.test.context.junit4.SpringRunner;

import org.springframework.util.Assert;
import java.io.IOException;

import java.util.List;
@RunWith(SpringRunner.class)

@SpringBootTest

public class SampleTest {
@Autowired
private CustomerMapper customerMapper;

@Test
public void testSelect() {
    System.out.println(("----- selectAll method test ------"));
    List<Customer> customers = customerMapper.selectList(null);
    Assert.notEmpty(customers);

//        Assert.assertEquals(5, customers.size());

customers.forEach(System.out::println);

}

}

可以把的到的json转换成java对象
ObjectMapper jsonMapper = new ObjectMapper();
@Test

public void testHttp() throws IOException {

HttpClient httpClient = HttpClients.createDefault();

HttpResponse response = httpClient.execute(new HttpGet("https://www.baidu.com"));

Assert.notNull(response);

System.out.println(response);

}
spring提供的简单方法.

@Test

public void testHttp() throws IOException {

RestTemplate rest = new RestTemplate();

rest.getForObject("",Float.class);

}

package com.yh;
import com.alibaba.fastjson.JSON;

import com.alibaba.fastjson.JSONObject;

import lombok.SneakyThrows;

import org.apache.http.client.methods.CloseableHttpResponse;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

import org.junit.Test;

import tk.mybatis.mapper.util.Assert;
import java.io.IOException;

import java.io.InputStream;

import java.net.URI;

import java.nio.charset.StandardCharsets;
public class insertData2DB {
@SneakyThrows
@Test
public void insert() {
    CloseableHttpClient client = HttpClients.createDefault();
    URI uri = new URI("http", null, "localhost", 8081, "/report/account", "currentPage=1&pageSize=15&depotId=&monthTime=2019-11", null);
    HttpPost post = new HttpPost(uri);
    CloseableHttpResponse response = client.execute(post);
    Assert.notNull(response, "请求失败");

    JSONObject json = getJsonFromInputStream(response.getEntity().getContent());

    System.out.println(json);
    System.out.println(json.getJSONObject("data").getJSONArray("rows").getJSONObject(0).getString("materialName"));
}

public JSONObject getJsonFromInputStream(InputStream inputStream) {
    StringBuilder sBuilder = new StringBuilder();
    byte[] buff = new byte[256];
    int read = 0;
    do {
        sBuilder.append(new String(buff, 0, read, StandardCharsets.UTF_8));
        try {
            read = inputStream.read(buff);
        } catch (IOException e) {
            e.printStackTrace();
        }
    } while (read > 0);

    return JSON.parseObject(sBuilder.toString());
}

}