java调用外部接口（含参数）

梦里梦外; 2023-07-13 04:23 12阅读 0赞

场景：页面查询时调用外部接口（含参数），对获取的数据进行封装返回页面

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3doejE5OTUxMQ_size_16_color_FFFFFF_t_70][]

url为外部接口，放入硬编码中；params为查询参数

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3doejE5OTUxMQ_size_16_color_FFFFFF_t_70 1][]

HttpUtil为工具类，doPost方法：

public static String doPost(String apiUrl, Map<String, Object> params) throws Exception {
            CloseableHttpClient httpClient = createSSLClientDefault();// HttpClients.createDefault();
    
            String httpStr = null;
            HttpPost httpPost = new HttpPost(apiUrl.trim());
            CloseableHttpResponse response = null;
            try {
                httpPost.setConfig(requestConfig);
                if (null == params) {
                    params = new HashMap<String, Object>();
                }
                List<NameValuePair> pairList = new ArrayList<NameValuePair>(params.size());
                for (Map.Entry<String, Object> entry : params.entrySet()) {
                    NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue().toString());
                    pairList.add(pair);
                }
                httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("UTF-8")));
                response = httpClient.execute(httpPost);
                int statusCode = response.getStatusLine().getStatusCode();
                HttpEntity entity = response.getEntity();
                httpStr = EntityUtils.toString(entity, "UTF-8");
            } catch (IOException e) {
                ;
            } finally {
                if (response != null) {
                    try {
                        EntityUtils.consume(response.getEntity());
                    } catch (IOException e) {
                        ;
                    }
                }
            }
            return httpStr;
        }

SJResponse为格式化数据返回格式

![20200310195050181.png][]

这样就通过页面a访问外部接口，获取第三方接口数据，封装好后返回给页面a显示

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3doejE5OTUxMQ_size_16_color_FFFFFF_t_70 2][]

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[20200310195050181.png]: https://img-blog.csdnimg.cn/20200310195050181.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3doejE5OTUxMQ_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200310200038378.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3doejE5OTUxMQ==,size_16,color_FFFFFF,t_70