2.使用httpclient发起post请求

1. post接口

//接口全路径：http://localhost:18081/hp
    @PostMapping("hp")
    public String hp(){
        return "ss";
    }

2. httpclient请求：

@Test
    public void testHttpPost(){
        try {
            //1.构建http对象(相当于浏览器)
            CloseableHttpClient httpClient = HttpClients.createDefault();
            //3.创建http post请求对象
            HttpPost post = new HttpPost("http://localhost:18081/hp");
            //4.创建响应对象
            CloseableHttpResponse response = httpClient.execute(post);
            /**
             * 由于响应接口返回的是一个字符串,因此需要转换
             * 响应体数据封装在HttpEntity对象中
             */
            String s = EntityUtils.toString(response.getEntity(), "utf-8");
            System.out.println(s);

            //5.释放资源
            response.close();
            httpClient.close();

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

响应结果:

23:21:00.390 [main] DEBUG org.apache.http.impl.conn.DefaultManagedHttpClientConnection - http-outgoing-0: set socket timeout to 0
23:21:00.390 [main] DEBUG org.apache.http.impl.conn.PoolingHttpClientConnectionManager - Connection released: [id: 0][route: {}->http://localhost:18081][total kept alive: 1; route allocated: 1 of 2; total allocated: 1 of 20]
ss
23:21:00.390 [main] DEBUG org.apache.http.impl.conn.PoolingHttpClientConnectionManager - Connection manager is shutting down
23:21:00.390 [main] DEBUG org.apache.http.impl.conn.DefaultManagedHttpClientConnection - http-outgoing-0: Close connection

3. post请求添加参数:

@Test
    public void testHttpPost(){
        try {
            //1.构建http对象(相当于浏览器)
            CloseableHttpClient httpClient = HttpClients.createDefault();
            //3.创建http post请求对象
            HttpPost post = new HttpPost("http://localhost:18081/hp");
            /**
             * 3.1添加请求参数,post请求参数是在body中
             * NameValuePair:封装参数的接口
             * BasicNameValuePair: 接口实现类
             */
            List<NameValuePair> params = new ArrayList<>();
            params.add(new BasicNameValuePair("key","wjh"));

            /**
             * 创建httpentity接口的文本实现类对象
             * 封装参数并设置编码
             */
            HttpEntity httpEntity = new UrlEncodedFormEntity(params,"utf-8");
            post.setEntity(httpEntity);//设置参数体

            //4.创建响应对象
            CloseableHttpResponse response = httpClient.execute(post);
            /**
             * 由于响应接口返回的是一个字符串,因此需要转换
             * 响应体数据封装在HttpEntity对象中
             */
            String s = EntityUtils.toString(response.getEntity(), "utf-8");
            System.out.println(s);

            //5.释放资源
            response.close();
            httpClient.close();

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

响应接口:

//接口全路径：http://localhost:18081/hp
    @PostMapping("hp")
    public String hp(String key){
        return "ss" + key;
    }

post请求结果:

23:29:18.230 [main] DEBUG org.apache.http.impl.conn.DefaultManagedHttpClientConnection - http-outgoing-0: set socket timeout to 0
23:29:18.230 [main] DEBUG org.apache.http.impl.conn.PoolingHttpClientConnectionManager - Connection released: [id: 0][route: {}->http://localhost:18081][total kept alive: 1; route allocated: 1 of 2; total allocated: 1 of 20]
sswjh
23:29:18.230 [main] DEBUG org.apache.http.impl.conn.PoolingHttpClientConnectionManager - Connection manager is shutting down
23:29:18.230 [main] DEBUG org.apache.http.impl.conn.DefaultManagedHttpClientConnection - http-outgoing-0: Close connection