httpclient,URL
网上介绍java,httpclients使用比较多,大多是比较老板本,或是感觉不完善,或是不安全的,于是借鉴并整理了简单的工具类,好,先给出官方httpclient api,代码如下:
import org.apache.http.HttpEntity; import org.apache.http.NameValuePair; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.methods.HttpRequestBase; import org.apache.http.client.utils.URIBuilder; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.impl.conn.PoolingHttpClientConnectionManager; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.net.URISyntaxException; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; /** * Created by on 2017/2/16. * httpclien version 4.4.1 */ public class HttpClientUtil { private static PoolingHttpClientConnectionManager cm = null; private static int POOL_MAX_CON = 50;// 整个连接池最大连接数 private static int MAX_PERROUTE = 5;// 每路由最大连接数,默认值是2 private static String CHARSET = "UTF-8"; private HttpClientUtil() { } /** * 初始化连接池 */ private static void init() { if (cm == null) { synchronized (HttpClientUtil.class) { if (cm == null) { cm = new PoolingHttpClientConnectionManager(); cm.setMaxTotal(POOL_MAX_CON); cm.setDefaultMaxPerRoute(MAX_PERROUTE); } } } } /** * get请求 */ public static String get(String url) { HttpGet httpGet = new HttpGet(url); return handleResult(httpGet); } /** * 带有参数get请求 */ public static String getByParameter(String url, Map<String, Object> params) throws URISyntaxException { URIBuilder ub = new URIBuilder().setPath(url).setParameters(wrapParameter(params)); HttpGet httpGet = new HttpGet(ub.build()); return handleResult(httpGet); } /** * post请求 */ public static String post(String url) { HttpPost httpPost = new HttpPost(url); return handleResult(httpPost); } /** * 带有参数post请求 */ public static String postByParameter(String url, Map<String, Object> params) throws UnsupportedEncodingException { HttpPost httpPost = new HttpPost(url); httpPost.setEntity(new UrlEncodedFormEntity(wrapParameter(params), CHARSET)); return handleResult(httpPost); } /** * 处理请求参数 */ private static ArrayList<NameValuePair> wrapParameter(Map<String, Object> params) { ArrayList<NameValuePair> pairs = new ArrayList<NameValuePair>(); if (params != null) { for (Map.Entry<String, Object> param : params.entrySet()) { pairs.add(new BasicNameValuePair(param.getKey(), String.valueOf(param.getValue()))); } } return pairs; } /** * 获取httpclient */ private static CloseableHttpClient getHttpClient() { init(); // HttpClientBuilder hcb = HttpClients.custom(); // HttpClientBuilder hcbui = HttpClientBuilder.create(); return HttpClients.custom().setConnectionManager(cm).build(); } /** * 处理请求结果,返回json字符串 */ private static String handleResult(HttpRequestBase request) { String result = null; CloseableHttpClient httpClient = getHttpClient(); CloseableHttpResponse response = null; try { response = httpClient.execute(request); HttpEntity entity = response.getEntity(); if (entity != null) { result = EntityUtils.toString(entity, CHARSET); } } catch (IOException e) { e.printStackTrace(); } finally { if (response != null) { try { response.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; } public static void main(String[] args) throws IOException, URISyntaxException { Map<String, Object> map = new HashMap<String, Object>(); String url = "http://172.16.50.54/machine/machineApi"; map.put("method", "findOrderByMobileAndCode"); map.put("mobile", "18600409520"); map.put("checkCode", "123456"); String str = getByParameter(url, map); System.out.println(str); } } // 附带校验URL有效工具类
package common; import java.net.HttpURLConnection; import java.net.URL; /** * Created by on 2017/2/16. */ public class URLValidUtil { /** * 校验url是否可用 * * @param url 请求URL * @param reTryCount 连接次数 */ public boolean validUrl(String url, Integer reTryCount) { URL Url = null; HttpURLConnection con = null; int counts = 0; boolean result = false; if (url == null || url.length() <= 0) return result; if (reTryCount == null || reTryCount <= 0) reTryCount = 1; try { Url = new URL(url); while (counts < reTryCount) { con = (HttpURLConnection) Url.openConnection(); int code = con.getResponseCode(); if (code == 200) { result = true; break; } } } catch (Exception e) { e.printStackTrace(); } finally { if (con != null) con.disconnect(); if (Url != null) Url = null; } return result; } }
相关推荐
84487600 2020-08-16
似水流年梦 2020-08-09
knightwatch 2020-07-26
fengchao000 2020-06-16
标题无所谓 2020-06-14
sicceer 2020-06-12
yanghui0 2020-06-09
yanghui0 2020-06-09
创建一个 HttpClient 实例,这个实例需要调用 Dispose 方法释放资源,这里使用了 using 语句。接着调用 GetAsync,给它传递要调用的方法的地址,向服务器发送 Get 请求。
wanghongsha 2020-06-04
jiaguoquan00 2020-05-26
zhaolisha 2020-05-16
wanghongsha 2020-05-05
wanghongsha 2020-04-14
knightwatch 2020-04-11
hygbuaa 2020-03-27
zergxixi 2020-03-24