简单的eHttpClient工具类

柔光的暖阳◎ 2022-06-13 11:13 198阅读 0赞

import org.apache.http.Header;
    import org.apache.http.HttpResponse;
    import org.apache.http.HttpStatus;
    import org.apache.http.NameValuePair;
    import org.apache.http.client.HttpClient;
    import org.apache.http.client.entity.UrlEncodedFormEntity;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.client.protocol.HttpClientContext;
    import org.apache.http.entity.StringEntity;
    import org.apache.http.util.EntityUtils;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    import java.util.List;
    
    /**
     * 简单的eHttpClient工具类
     *
     * Created by chao on 2017/6/27. */
    public class SimpleHttpClientUtil {
    
        private Logger logger = LoggerFactory.getLogger(getClass()) ;
        private HttpClient httpClient ;
        private HttpClientContext httpClientContext ;
    
        /**
         * 无参空构造
         */
        public SimpleHttpClientUtil(){}
    
        /**
         * 含参构造
         * @param client httpClient
         * @param context HttpClientContext
         */
        public SimpleHttpClientUtil(HttpClient client, HttpClientContext context){
            this.httpClient = httpClient ;
            this.httpClientContext = httpClientContext ;
        }
    
        /**
         * 重定向
         * @param response 重定向上游HttpResponse
         * @param client HttpClient
         * @param context HttpClientContext
         * @return HttpResponse
         */
        public HttpResponse redirectResp(HttpResponse response, HttpClient client, HttpClientContext context){
            Header header=response.getFirstHeader("Location") ;
            return httpGetResp(client,context,header.getValue()) ;
        }
    
        /**
         * 重定向
         * @param response 重定向上游HttpResponse
         * @param client HttpClient
         * @param context HttpClientContext
         * @return 响应码
         */
        public int redirect(HttpResponse response, HttpClient client, HttpClientContext context){
            Header header=response.getFirstHeader("Location") ;
            return httpGet(client,context,header.getValue()) ;
        }
    
        public int redirect(HttpResponse response){
            return redirect(response,this.httpClient,this.httpClientContext) ;
        }
    
        /**
         * GET 方式访问
         *
         * @param client HttpClient
         * @param context HttpClientContext
         * @param url url
         * @return 响应文本内容
         */
        public String httpGetRespTxt(HttpClient client, HttpClientContext context,String url){
            String webTxt ;
            HttpGet httpGet = new HttpGet(url) ;
            HttpResponse response ;
            httpGet.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240") ;//逃避反爬虫
            try{
                response = client.execute(httpGet,context) ;
                webTxt = EntityUtils.toString(response.getEntity()) ;
            }catch (Exception e){
                logger.error("GET 方式访问异常:"+url,e) ;
                throw new SimpleException(2,"Http响应："+e.getMessage()) ;
            }finally {
                httpGet.abort() ;
            }
            return webTxt ;
        }
    
        /**
         * GET 方式访问
         *
         * @param client HttpClient
         * @param context HttpClientContext
         * @param url url
         * @return HttpResponse
         */
        public HttpResponse httpGetResp(HttpClient client, HttpClientContext context,String url){
            HttpGet httpGet = new HttpGet(url) ;
            HttpResponse response ;
            httpGet.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240") ;//逃避反爬虫
            try{
                response = client.execute(httpGet,context) ;
            }catch (Exception e){
                logger.error("GET 方式访问异常:"+url,e) ;
                throw new SimpleException(2,"Http响应："+e.getMessage()) ;
            }finally {
                httpGet.abort() ;
            }
            return response ;
        }
    
        /**
         * GET 方式访问
         *
         * @param client HttpClient
         * @param context HttpClientContext
         * @param url url
         * @return 响应码
         */
        public int httpGet(HttpClient client, HttpClientContext context,String url){
            return httpGetResp(client,context,url).getStatusLine().getStatusCode() ;
        }
    
        /**
         * GET 方式访问
         * @param url url
         * @return 响应码
         */
        public int httpGet(String url) {
            return httpGet(this.httpClient,this.httpClientContext,url) ;
        }
    
        /**
         * post json请求
         * @param client HttpClient
         * @param context HttpClientContext
         * @param url url
         * @param json json
         * @return json
         */
        public String httpPostJson(HttpClient client, HttpClientContext context,String url,String json){
            HttpPost httpPost = new HttpPost(url);
            httpPost.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36") ;//逃避反爬虫
            String resultJson="" ;
            HttpResponse httpResponse = null ;
            try {
                StringEntity se = new StringEntity(json);
                se.setContentEncoding("UTF-8");
                se.setContentType("application/json");//发送json数据需要设置contentType
                httpPost.setEntity(se);
                httpResponse = client.execute(httpPost);
                if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
                    resultJson= EntityUtils.toString(httpResponse.getEntity());// 返回json格式：
                }
            } catch (Exception e) {
                System.out.println("httpPostJson:"+httpResponse.getStatusLine());
                logger.error("POST 方式访问异常:"+url+" httpPostJson:"+httpResponse.getStatusLine(),e) ;
                e.printStackTrace();
                throw new RuntimeException(e);
            }
            return resultJson ;
        }
        /**
         * POST 方式访问
         * @param client HttpClient
         * @param context HttpClientContext
         * @param url url
         * @param nvp List<NameValuePair>
         * @return 响应文本内容
         */
        public String httpPostRespTxt(HttpClient client, HttpClientContext context,String url,List<NameValuePair> nvp){
            String webTxt;
            HttpPost httpPost = new HttpPost(url) ;
            httpPost.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36") ;//逃避反爬虫
            HttpResponse response ;
            try{
                httpPost.setEntity(new UrlEncodedFormEntity(nvp,"UTF-8")) ;
                response = client.execute(httpPost,context) ;
                webTxt = EntityUtils.toString(response.getEntity()) ;
            }catch (Exception e){
                logger.error("POST 方式访问异常:"+url,e) ;
                throw new SimpleException(2,"Http响应："+e.getMessage()) ;
            }finally {
                httpPost.abort() ;
            }
            return webTxt ;
        }
    
        /**
         * POST 方式访问
         * @param client HttpClient
         * @param context HttpClientContext
         * @param url url
         * @param nvp List<NameValuePair>
         * @return HttpResponse
         */
        public HttpResponse httpPostResp(HttpClient client, HttpClientContext context,String url,List<NameValuePair> nvp){
            HttpPost httpPost = new HttpPost(url) ;
            httpPost.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36") ;//逃避反爬虫
            HttpResponse response ;
            try{
                httpPost.setEntity(new UrlEncodedFormEntity(nvp,"UTF-8")) ;
                response = client.execute(httpPost,context) ;
            }catch (Exception e){
                logger.error("POST 方式访问异常:"+url,e) ;
                throw new SimpleException(2,"Http响应："+e.getMessage()) ;
            }finally {
                httpPost.abort() ;
            }
            return response ;
        }
        /**
         * POST 方式访问
         * @param client HttpClient
         * @param context HttpClientContext
         * @param url url
         * @param nvp List<NameValuePair>
         * @return 响应码
         */
        public int httpPost(HttpClient client, HttpClientContext context,String url,List<NameValuePair> nvp){
            return httpPostResp(client,context,url,nvp).getStatusLine().getStatusCode() ;
        }
    
        /**
         * POST 方式访问
         * @param url url
         * @param nvp List<NameValuePair>
         * @return 响应码
         */
        public int httpPost(String url,List<NameValuePair> nvp){
            return httpPost(this.httpClient,this.httpClientContext,url,nvp) ;
        }
    }

<dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpclient</artifactId>
                <version>4.3.2</version>
            </dependency>