HttpClient CloseableHttpClient GetMethod PostMethod http

article/2025/10/22 12:54:59

pom依赖

        <!--HttpClient的依赖--><dependency><groupId>commons-httpclient</groupId><artifactId>commons-httpclient</artifactId><version>3.1</version></dependency><!--CloseableHttpClient的依赖--><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.2</version></dependency>

HttpClient 的get请求方式

private static void doGet() {HttpClient client = new HttpClient();GetMethod getMethod = new GetMethod("https://www.thepaper.cn/");int code = 0;try {code = client.executeMethod(getMethod); // 返回StatusCode，即状态码if (code == 200) {String res = getMethod.getResponseBodyAsString();  // 这个代码，没太理解。System.out.println(res);}} catch (IOException e) {e.printStackTrace();}
}

idea运行结果：

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postman调试结果：

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HttpClient 的post请求方式

private static void doPost() {String praiseUrl = "https://www.thepaper.cn/www/commentPraise.msp"; // 澎湃新闻评论点赞urlHttpClient client = new HttpClient(); // httpClientPostMethod postMethod = new PostMethod(praiseUrl);  // postMethod// 必须设置下面这个Header  设置请求头postMethod.addRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 " +"(KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");postMethod.addParameter("commentId", "18718372"); // 评论的id，抓包获得try {int code = client.executeMethod(postMethod); // 获取返回码。if (code == 200) {String res = postMethod.getResponseBodyAsString(); // 获取响应的 响应体。System.out.println(res);}} catch (IOException e) {e.printStackTrace();}
}

idea运行结果：

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post请求结果：

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CloseableHttpClient的get请求方式

public static void doGet() {CloseableHttpClient client = HttpClientBuilder.create().build(); // 获取http客户端。HttpGet get = new HttpGet("http://www.thepaper.cn"); // 建立httpGettry {// 很奇怪，使用CloseableHttpClient来请求澎湃新闻的首页，GTE请求也必须加上下面这个Header，但是使用HTTPClient则不需要get.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like " +"Gecko) Chrome/58.0.3029.81 Safari/537.36"); // 加上请求头HttpResponse response = client.execute(get); // 获取响应。responseString res = EntityUtils.toString(response.getEntity()); // 获取响应体。System.out.println(res);} catch (IOException e) {e.printStackTrace();}
}

CloseableHttpClient的post请求方式

public static void doPost() {CloseableHttpClient client = HttpClientBuilder.create().build();HttpPost post = new HttpPost("https://www.thepaper.cn/www/commentPraise.msp");try {post.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like " +"Gecko) Chrome/58.0.3029.81 Safari/537.36");List<NameValuePair> params = new ArrayList<>();params.add(new BasicNameValuePair("commentId", "18718372"));post.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));HttpResponse response = client.execute(post);String res = EntityUtils.toString(response.getEntity());System.out.println(res);} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}
}