HttpClient使用之模拟post及get请求

最新推荐文章于 2024-11-29 21:02:03 发布

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最新推荐文章于 2024-11-29 21:02:03 发布

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文章标签：工具类 http

本文链接：https://blog.youkuaiyun.com/qq_41170231/article/details/95474499

博客主要讲述了整理HTTP工具类，目的是为后续的HTTP通信提供便利，涉及到GET请求和POST请求。

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整理http工具类方便以后进行http通信

get请求

  /**
     * get请求
     *
     * @param url
     * @param uid
     * @param token
     * @return
     * @throws IOException
     */
    public static String doGet(String url, Long uid, String token) {
        // 创建Httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();
        // 创建get请求对象
        HttpGet httpGet = new HttpGet(url);
        //设置必要的请求头参数
        if (!ObjectUtils.isEmpty(uid)) {
            httpGet.addHeader("uid", uid.toString());
        }
        if (!StringUtils.isEmpty(token)) {
            httpGet.addHeader("accessToken", token);
        }


        CloseableHttpResponse response = null;
        String content = null;
        try {
            response = httpclient.execute(httpGet);
            //当请求成功后获得回复数据
            if (response.getStatusLine().getStatusCode() == 200) {
            
                content = EntityUtils.toString(response.getEntity(), "UTF-8");
                System.out.println(content);
            }
        } catch (Exception e) {
            //打印错误日志信息
            log.error(e.getMessage());
        } finally {
            if (response != null) {
                try {
                //关闭流
                    response.close();
                    httpclient.close();
                } catch (IOException e) {
                    log.error(e.getMessage());
                }
            }
        }
        return content;
    }

post请求

/**
     * @Title: doPost
     * @Description: application/x-www-form-urlencoded编码方式带参数和请求头的POST请求
     * @param: url
     * @param: param
     * @param: header
     * @Date: 2019-05-27 15:27
     * @return: java.lang.String
     * @throws:
     */
    public static String doPost(String url, Map<String, Object> param, Map<String, Object> header) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String resultString = "";
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);
            if (header != null) {
            	//遍历请求头参数列表，将其放入请求头中
                for (String key : header.keySet()) {
                    httpPost.setHeader(key, header.get(key).toString());
                }
            }

            // 创建参数列表
            if (param != null) {
                List<NameValuePair> paramList = new ArrayList();
                for (String key : param.keySet()) {
                    paramList.add(new BasicNameValuePair(key, param.get(key).toString()));
                }
                // 模拟表单
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList, "utf-8");
                httpPost.setEntity(entity);
            }
            // 执行http请求
            response = httpClient.execute(httpPost);
            resultString = EntityUtils.toString(response.getEntity(), "utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return resultString;
    }