java用org.apache.http.client.HttpClient发送get请求（参数和url分开、一整个url）

本文链接：https://blog.youkuaiyun.com/qq_40308101/article/details/107834615

本文详细介绍了如何在Java中利用org.apache.http.client.HttpClient库执行GET请求，包括将参数与URL分开以及直接使用完整URL的方式。通过实例代码，展示了如何构建请求、设置参数以及获取响应内容，为Java开发者提供HTTP请求操作的参考。

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//发送get请求,参数和url分开
public static Map<String, Object> sendGet_params(String url, String[] name, String[] value, String[] herderName, String[] headerValue) throws IOException {
    CloseableHttpClient httpClient = HttpClients.createDefault();
    //添加传参
    List<NameValuePair> params = new ArrayList<>();
    for (int i = 0; i < name.length; i++) {
        BasicNameValuePair basicNameValuePair = new BasicNameValuePair(name[i].trim(), value[i].trim());//trim():去掉字符串首尾的空格
        params.add(basicNameValuePair);
    }
    String str = EntityUtils.toString(new UrlEncodedFormEntity(params, Consts.UTF_8));//转换为键值对
    HttpGet httpGet = new HttpGet(url + "?" + str);    //创建Get请求
    // 设置超时
    httpGet.setConfig(requestConfig);
    //添加herder信息
    for (int i = 0; i < herderName.length; i++) {
        httpGet.addHeader(herderName[i], headerValue[i]);
    }
    LocalTime startTime = LocalTime.now();//响应开始时间
    CloseableHttpResponse response = httpClient.execute(httpGet);//执行Get请求
    LocalTime endTime = LocalTime.now();//响应结束时间
    int code = response.getStatusLine().getStatusCode();
    if (code != 200) {
        System.out.println(url + response);
    }
    Map<String, Object> map = new HashMap<>();
    map.put("entity", EntityUtils.toString(response.getEntity(), "utf-8"));//得到响应体
    map.put("Content-Type", response.getEntity().getContentType().getValue());
    map.put("code", code);
    map.put("responseTime", Duration.between(startTime, endTime).toMillis());
    response.close();
    httpClient.close();
    return map;
}

//发送get请求,一整个url
public static Map<String, Object> sendGet(String url, String[] herderName, String[] headerValue) throws IOException {
    CloseableHttpClient httpClient = HttpClients.createDefault();
    HttpGet httpGet = new HttpGet(url);
    // 设置超时
    httpGet.setConfig(requestConfig);
    //添加herder信息
    for (int i = 0; i < herderName.length; i++) {
        httpGet.addHeader(herderName[i], headerValue[i]);
    }
    LocalTime startTime = LocalTime.now();//响应开始时间
    CloseableHttpResponse response = httpClient.execute(httpGet);
    LocalTime endTime = LocalTime.now();//响应结束时间
    int code = response.getStatusLine().getStatusCode();
    if (code != 200) {
        System.out.println(url + response);
    }
    Map<String, Object> map = new HashMap<>();
    map.put("entity", EntityUtils.toString(response.getEntity(), "utf-8"));
    map.put("Content-Type", response.getEntity().getContentType().getValue());
    map.put("code", code);
    map.put("responseTime", Duration.between(startTime, endTime).toMillis());
    response.close();
    httpClient.close();
    return map;
}