OkHttpClient发起http请求

Dear 丶 2023-10-04 21:08 58阅读 0赞

使用**OkHttpClient首先需要导入依赖**

<dependency>
                　　<groupId>com.squareup.okhttp3</groupId>
                　　<artifactId>okhttp</artifactId>
                　　<version>3.4.1</version>
            </dependency>

接下来展示发起请求代码部分。

1.  ##### GET请求 #####

/**
         * 地址逆解析
         * @param mapStr
         * @return
         * @throws IOException
         */
        public String run(String mapStr) throws IOException {
            OkHttpClient client = new OkHttpClient();
            Request request = new Request.Builder()
                    .url(mapStr)
                    .build();
            try (Response response = client.newCall(request).execute()) {
                System.out.println(response);
                String res = response.body().string();
                JSONObject pa=JSONObject.parseObject(res);
                JSONObject pas= JSONObject.parseObject(pa.getString("result"));
                System.out.println("ressponse.body:"+res);
            }catch (Exception e){
                e.printStackTrace();
                System.out.println("地理位置逆解析错误!");
            }
            return "";
        }

1.  ##### POST请求 #####

/**
         * 返回剩余流量
         * @param iccId
         * @return
         */
        public Double returnLeftFlow(String iccId){
            try{
                //发送查询请求
                String ip = "http://127.0.0.1:8801";
                String interfaceUrl = "/api/v1/card/base/flow/left/{"+ iccId +"}";
                Long now = System.currentTimeMillis();
                String appId = "test";
                String appKey = "test";
                //生成签名-sha1Hex
                String signBefore = interfaceUrl + now + appId + appKey;
                String signAfter = DigestUtils.sha1Hex(signBefore);
                //请求路径
                String url = ip + interfaceUrl;
    
                //设置请求参数
                JSONObject paramObject = new JSONObject();
                paramObject.put("test", "test");
                //发送请求
                OkHttpClient client = new OkHttpClient();
                Request request = new Request.Builder()
                        //这里必须手动设置为json内容类型
                        .addHeader("appid", appId)
                        .addHeader("sign", signAfter)
                        .addHeader("timestamp", now+"")
                        .addHeader("content-type", "application/json")
                        //参数放到链接后面
                        .url(url)
                        //.post(okhttp3.RequestBody.create(MediaType.parse("application/json; charset=utf-8"), paramObject.toString()))
                        .build();
                Response response = client.newCall(request).execute();
                System.out.println(response);
                String res = response.body().string();
                System.out.println(res);
            }catch (Exception e){
                e.printStackTrace();
            }
            return 0.0;
        }

注：**OkHttpClient可设置请求超时时间，放在静态代码块里边，防止重复加载**

static {
            httpClient = new OkHttpClient.Builder()
                    //设置连接超时时间
                    .connectTimeout(30, TimeUnit.SECONDS)
                    //设置读取超时时间
                    .readTimeout(30, TimeUnit.SECONDS)
                    .build();
      }

还可以发送异步http请求，有需要可自行百度。