Apache HttpComponents 简单使用

朱雀 2023-09-30 02:01 169阅读 0赞

#### 文章目录 ####

*   *   *   *  一、简介
             *   *  1、导入依赖
             *  二、post 请求
             *   *  1、post 请求传递 x-www-form-urlencoded 参数
                 *  2、post/get 请求传递 json 参数
                 *  3、post 请求传递 multipart/form-data 参数（含文件）
             *  三、关闭 Debug 日志打印

官网 [https://hc.apache.org/httpcomponents-client-4.5.x/index.html][https_hc.apache.org_httpcomponents-client-4.5.x_index.html]

参考 [https://www.cnblogs.com/lrzy/articles/15667814.html][https_www.cnblogs.com_lrzy_articles_15667814.html]

*  网络编程（含 UrlConnection 发送 HTTP 请求下载文件）：[https://blog.csdn.net/qq\_41538097/article/details/118722718][https_blog.csdn.net_qq_41538097_article_details_118722718]
 *  Apache HttpComponents 简单使用：[https://blog.csdn.net/qq\_41538097/article/details/123719298][https_blog.csdn.net_qq_41538097_article_details_123719298]
 *  RestTemplate简单使用：[https://blog.csdn.net/qq\_41538097/article/details/123560238][https_blog.csdn.net_qq_41538097_article_details_123560238]
 *  okhttp3简单使用：[https://blog.csdn.net/qq\_41538097/article/details/123677614][https_blog.csdn.net_qq_41538097_article_details_123677614]
 *  HttpURLConnection 简单使用：[https://blog.csdn.net/qq\_41538097/article/details/123697432][https_blog.csdn.net_qq_41538097_article_details_123697432]

##### 一、简介 #####

Apache Commons HttpClient（或被称为 Apache HttpClient 3.x）、Apache HttpComponents Client（或被称为 Apache HttpClient 4.x）

HttpComponents 项目就是专门设计来简化 HTTP 客户端与服务器进行各种通讯编程。

**现在的 HttpComponents 包含多个子项目**

HttpComponents Core、HttpComponents Client、HttpComponents AsyncClient、Commons HttpClient

**主要的功能**

*  实现了所有 HTTP 的方法（GET,POST,PUT,HEAD 等）
 *  支持自动转向
 *  支持 HTTPS 协议
 *  支持代理服务器等
 *  支持Cookie

###### 1、导入依赖 ######

最新版本 4.5.13

<dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.13</version>
    </dependency>

请求地址：`http://127.0.0.1:8080/HttpClient/get/params?id=123456&name=admin`

@Autowired
        HttpClientComponentsController httpClientComponentsController;
    
        @Test
        public void getMethod() throws IOException {
        
            JSONObject jsonObject = new JSONObject();
            jsonObject.put("id", 123456);
            jsonObject.put("name", "admin");
    
            StringBuilder url = new StringBuilder("http://127.0.0.1:8080/HttpClient/get/params");
            url.append("?");
            for (String s : jsonObject.keySet()) {
        
                url.append(s).append("=").append(jsonObject.get(s)).append("&");
            }
            String substring = url.substring(0, url.length() - 1);
            CloseableHttpClient closeableHttpClient = HttpClients.createDefault();
    
            CloseableHttpResponse closeableHttpResponse = closeableHttpClient.execute(new HttpGet(substring));
    
            System.out.println(EntityUtils.toString(closeableHttpResponse.getEntity()));
        }

java 接口

@GetMapping("/get/params")
        public JSONObject getParams(@RequestParam String id, @RequestParam("name") String userName){
        }

##### 二、post 请求 #####

###### 1、post 请求传递 x-www-form-urlencoded 参数 ######

请求地址：`http://127.0.0.1:8080/HttpClient/post/params/x-www`  
![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5LiN5oeC5LiA5LyR_size_20_color_FFFFFF_t_70_g_se_x_16]  
UrlEncodedFormEntity 继承 StringEntity 构造方法默认 `CONTENT_TYPE = "Content-Type: application/x-www-form-urlencoded; charset=UTF-8"` 所以传递参数可以在 url 后使用 & 拼接参数

@Test
        public void getPost() throws IOException {
        
            String url = "http://127.0.0.1:8080/HttpClient/post/params/x-www";
            List<NameValuePair> form = new ArrayList<>();
            form.add(new BasicNameValuePair("name", "admin"));
            form.add(new BasicNameValuePair("password", "123456"));
            HttpEntity reqEntity = new UrlEncodedFormEntity(form, "utf-8");
            Header header = new BasicHeader("Connection", "Keep-Alive");
            RequestConfig requestConfig = RequestConfig.custom()
                    .setSocketTimeout(5000)
                    .setConnectTimeout(5000)
                    .setConnectionRequestTimeout(5000)
                    .build();
            HttpPost httpPost = new HttpPost(url);
            httpPost.setEntity(reqEntity);
            httpPost.setHeader(header);
            httpPost.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36");
            // 默认 Content-Type
            httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;");
            httpPost.setConfig(requestConfig);
            HttpClient httpClient = HttpClients.custom().build();
            HttpResponse httpResponse = httpClient.execute(httpPost);
            System.out.println(EntityUtils.toString(httpResponse.getEntity()));
        }

java 接口

@PostMapping("/post/params/x-www")
        public JSONObject postParams(String name, String password) {
        }

###### 2、post/get 请求传递 json 参数 ######

StringEntity 可以传递 json 参数，默认 `CONTENT_TYPE = "text/plain; charset=ISO-8859-1“`  
请求地址：`http://127.0.0.1:8080/HttpClient/post/params/json`  
![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5LiN5oeC5LiA5LyR_size_20_color_FFFFFF_t_70_g_se_x_16 1]

@Test
        public void getPostFormData() throws IOException {
        
            Map<String, Object> map = new HashMap<>();
            map.put("account", "admin");
            map.put("password", "123456");
            JSONObject jsonObject = new JSONObject(map);
            String url = "http://127.0.0.1:8080/HttpClient/post/params/json";
            StringEntity se = new StringEntity(jsonObject.toJSONString());
            se.setContentEncoding("UTF-8");
            se.setContentType("application/json");//发送json需要设置contentType
            HttpPost httpPost = new HttpPost(url);
            httpPost.setEntity(se);
            CloseableHttpClient httpClient = HttpClients.createDefault();
            CloseableHttpResponse response = httpClient.execute(httpPost);
            log.info(EntityUtils.toString(response.getEntity()));
        }

java 接口

@PostMapping("/post/params/json")
        public JSONObject postParams(@RequestBody Map<String, Object> map) {
        }

###### 3、post 请求传递 multipart/form-data 参数（含文件） ######

传递 multipart/form-data 参数需要导入 httpmime 依赖

<dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpmime</artifactId>
                <version>4.5.13</version>
            </dependency>

请求地址：`http://127.0.0.1:8080/okhttp3/post/params_from_async`  
![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5LiN5oeC5LiA5LyR_size_20_color_FFFFFF_t_70_g_se_x_16 2]

@Test
        public void getPostFormFile() throws IOException {
        
            File file = new File("C:\\Users\\Administrator\\Pictures\\小程序\\126.jpg");
            MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
            // 文件
            multipartEntityBuilder.addBinaryBody("file", file, ContentType.IMAGE_JPEG, "126.jpg");
            // 文本
            multipartEntityBuilder.addTextBody("name", "admin", ContentType.TEXT_PLAIN);
            multipartEntityBuilder.addTextBody("password", "123456", ContentType.TEXT_PLAIN);
            HttpEntity httpEntity = multipartEntityBuilder.build();
            String url = "http://127.0.0.1:8080/okhttp3/post/params_from_async";
            HttpPost httpPost = new HttpPost(url);
            httpPost.setEntity(httpEntity);
            CloseableHttpClient httpClient = HttpClients.createDefault();
            CloseableHttpResponse response = httpClient.execute(httpPost);
            log.info(EntityUtils.toString(response.getEntity()));
        }

java 接口

@PostMapping("/post/params_from_async")
        public JSONObject postParamsFromAsync(@RequestParam("file") MultipartFile file, HttpServletRequest request) throws InterruptedException, IOException, ServletException {
        }

##### 三、关闭 Debug 日志打印 #####

如果你只使用 main 方法调用 Api 接口，控制台会打印很多无用日志（如果是 Springboot 项目可以配置日志配置文件，如：loback.xml），main 方法可以通过调整日志级别关闭 Debug 日志打印

<dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.13</version>
    </dependency>

main 方法调用控制台打印无用日志  
![在这里插入图片描述][db0b260603d844308eece418917b7c7e.png]  
调整日志级别

import ch.qos.logback.classic.Level;
    import ch.qos.logback.classic.LoggerContext;
    import org.slf4j.LoggerFactory;
    public class TestBlob {
        
        public static void main(String[] args) {
        
            ((LoggerContext) LoggerFactory.getILoggerFactory())
                    .getLoggerList()
                    .forEach(logger -> logger.setLevel(Level.ERROR));
    
            System.out.println(getArticleCount());
            System.out.println(ArrayUtils.toString(getUrl()));
        }
    }

[https_hc.apache.org_httpcomponents-client-4.5.x_index.html]: https://hc.apache.org/httpcomponents-client-4.5.x/index.html
[https_www.cnblogs.com_lrzy_articles_15667814.html]: https://www.cnblogs.com/lrzy/articles/15667814.html
[https_blog.csdn.net_qq_41538097_article_details_118722718]: https://blog.csdn.net/qq_41538097/article/details/118722718
[https_blog.csdn.net_qq_41538097_article_details_123719298]: https://blog.csdn.net/qq_41538097/article/details/123719298
[https_blog.csdn.net_qq_41538097_article_details_123560238]: https://blog.csdn.net/qq_41538097/article/details/123560238
[https_blog.csdn.net_qq_41538097_article_details_123677614]: https://blog.csdn.net/qq_41538097/article/details/123677614
[https_blog.csdn.net_qq_41538097_article_details_123697432]: https://blog.csdn.net/qq_41538097/article/details/123697432
[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5LiN5oeC5LiA5LyR_size_20_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/c5930fd4ca29407aaa7e4bc41f45843c.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA5LiN5oeC5LiA5LyR,size_20,color_FFFFFF,t_70,g_se,x_16
[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5LiN5oeC5LiA5LyR_size_20_color_FFFFFF_t_70_g_se_x_16 1]: https://img-blog.csdnimg.cn/9f4f4e7fa9544acd98972db9b06b7600.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA5LiN5oeC5LiA5LyR,size_20,color_FFFFFF,t_70,g_se,x_16
[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5LiN5oeC5LiA5LyR_size_20_color_FFFFFF_t_70_g_se_x_16 2]: https://img-blog.csdnimg.cn/a3f6b47158ca4f7d954c36dc1ee04a5e.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA5LiN5oeC5LiA5LyR,size_20,color_FFFFFF,t_70,g_se,x_16
[db0b260603d844308eece418917b7c7e.png]: https://img-blog.csdnimg.cn/db0b260603d844308eece418917b7c7e.png