Java：retrofit2发送http网络请求

文档：https://square.github.io/retrofit/
Github: https://github.com/square/retrofit

使用Python Flask提供简易的api测试服务

# -*- coding: utf-8 -*-
import random

from flask import Flask, request, jsonify

app = Flask(__name__)


@app.route("/get")
def get(): """通过get方式传递查询参数""" name = request.args.get("name") age = random.randint(10, 30) data = { "name": name, "age": age, } return jsonify(data)


@app.route("/post", methods=['POST'])
def post(): """通过post方式提交json数据""" name = request.json.get("name") age = random.randint(10, 30) data = { "name": name, "age": age, } return jsonify(data)


if __name__ == '__main__': app.run(debug=True)


  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
  
18
  
19
  
20
  
21
  
22
  
23
  
24
  
25
  
26
  
27
  
28
  
29
  
30
  
31
  
32
  
33
  
34
  
35
  
36
  
37
  
38
  
39
 

依赖

<!--retrofit2引入的依赖-->
<dependency> <groupId>com.squareup.retrofit2</groupId> <artifactId>retrofit</artifactId> <version>2.9.0</version>
</dependency>

<dependency> <groupId>com.squareup.retrofit2</groupId> <artifactId>converter-gson</artifactId> <version>2.0.0-beta3</version>
</dependency>

<!--用于测试-->
<dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.13</version> <scope>test</scope>
</dependency>

  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
  
18
  
19
  
20
 

返回的实体对象

package com.demo.http;

public class Person { private String name; private Integer age; public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } @Override public String toString() { return "Person{" + "name='" + name + '\'' + ", age=" + age + '}'; }
}


  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
  
18
  
19
  
20
  
21
  
22
  
23
  
24
  
25
  
26
  
27
  
28
  
29
  
30
  
31
  
32
 

请求接口

package com.demo.http;


import okhttp3.RequestBody;
import retrofit2.Call;
import retrofit2.http.Body;
import retrofit2.http.GET;
import retrofit2.http.POST;
import retrofit2.http.Query;

public interface ApiService { @GET("/get") Call<Person> getPerson(@Query("name") String name); @POST("/post") Call<Person> postPerson(@Body RequestBody body);
}

  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
 

测试代码

package com.demo.http;

import com.google.gson.Gson;
import okhttp3.MediaType;
import okhttp3.RequestBody;
import org.junit.BeforeClass;
import org.junit.Test;
import retrofit2.Call;
import retrofit2.GsonConverterFactory;
import retrofit2.Response;
import retrofit2.Retrofit;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class RequestTest { // 请求地址 private static final String BASE_URL = "http://127.0.0.1:5000/"; // json private static final MediaType JSON = MediaType.get("application/json; charset=utf-8"); private static Retrofit retrofit; @BeforeClass public static void setUp() { retrofit = new Retrofit.Builder() .baseUrl(BASE_URL) // 类型转换 Could not locate ResponseBody converter for class .addConverterFactory(GsonConverterFactory.create()) .build(); } /** * GET 测试 * * @throws IOException */ @Test public void testGet() throws IOException { ApiService request = retrofit.create(ApiService.class); Call<Person> call = request.getPerson("Tom"); // Person person = call.execute(); // 同步请求 Response<Person> response = call.execute(); Person person = response.body(); System.out.println(person); // Person{name='Tom', age=10} } /** * POST json 测试 * * @throws IOException */ @Test public void testPost() throws IOException { ApiService request = retrofit.create(ApiService.class); // body参数 Map<String, Object> map = new HashMap<>(); map.put("name", "Jack"); Gson gson = new Gson(); String body = gson.toJson(map); System.out.println(body); RequestBody requestBody = RequestBody.create(body, JSON); Call<Person> call = request.postPerson(requestBody); // 同步执行 Response<Person> response = call.execute(); Person person = response.body(); System.out.println(person); //  Person{name='Tom', age=24} }
}


  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
  
18
  
19
  
20
  
21
  
22
  
23
  
24
  
25
  
26
  
27
  
28
  
29
  
30
  
31
  
32
  
33
  
34
  
35
  
36
  
37
  
38
  
39
  
40
  
41
  
42
  
43
  
44
  
45
  
46
  
47
  
48
  
49
  
50
  
51
  
52
  
53
  
54
  
55
  
56
  
57
  
58
  
59
  
60
  
61
  
62
  
63
  
64
  
65
  
66
  
67
  
68
  
69
  
70
  
71
  
72
  
73
  
74
  
75
  
76
  
77
  
78
  
79
  
80
  
81
  
82
 

参考
这是一份很详细的 Retrofit 2.0 使用教程（含实例讲解）

文章来源: pengshiyu.blog.csdn.net，作者：彭世瑜，版权归原作者所有，如需转载，请联系作者。

原文链接：pengshiyu.blog.csdn.net/article/details/111995754