简单封装的httpclient4请求类

项目中经常会用到跨项目之间的请求，这时候我们经常采用的httpclient，由于大多数情况下并用不到一些非常复杂的功能，所以这里我将一些基本的请求封装了一下，以方便日常开发中使用。

以下类实现了如果重新new 一个Class的情况下，多次请求使用的是一个session。

package util.http;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.Date;import java.util.HashMap;import java.util.List;import java.util.Map;import org.apache.http.Header;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.CookieStore;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.cookie.Cookie;import org.apache.http.impl.client.AbstractHttpClient;import org.apache.http.impl.client.BasicCookieStore;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClientBuilder;import org.apache.http.impl.client.HttpClients;import org.apache.http.impl.cookie.BasicClientCookie;import org.apache.http.message.BasicHeader;import org.apache.http.message.BasicNameValuePair;import org.apache.http.protocol.BasicHttpContext;import org.apache.http.protocol.HttpContext;import org.apache.http.util.EntityUtils;import util.common.MapUtil;public class SimpleHttpClient {private HttpClientBuilder httpclientBuilder;private CloseableHttpClient httpclient;private HttpContext context;private Header[] responseHeaders;public SimpleHttpClient() {//httpclient = HttpClients.createDefault();httpclientBuilder = HttpClients.custom();httpclient = httpclientBuilder.build();context = new BasicHttpContext();}@SuppressWarnings("unchecked")private List<BasicNameValuePair> toNameValuePairList(Map<String, String> m) {List<BasicNameValuePair> nameValuePairList = new ArrayList<BasicNameValuePair>();List<String> keylist = MapUtil.keyList(m);for (String key : keylist) {nameValuePairList.add(new BasicNameValuePair(key, m.get(key)));}return nameValuePairList;}public String get(String url) throws ClientProtocolException, IOException {HttpGet httpget = new HttpGet(url);CloseableHttpResponse response = httpclient.execute(httpget, context);responseHeaders = response.getAllHeaders();String result = EntityUtils.toString(response.getEntity());response.close();return result;}public String post(String url) throws ClientProtocolException, IOException {HttpPost httppost = new HttpPost(url);CloseableHttpResponse response = httpclient.execute(httppost, context);responseHeaders = response.getAllHeaders();String result = EntityUtils.toString(response.getEntity());response.close();return result;}public String post(String url, Header[] headers) throws ClientProtocolException, IOException {HttpPost httppost = new HttpPost(url);for (Header header : headers) {httppost.setHeader(header);}CloseableHttpResponse response = httpclient.execute(httppost, context);responseHeaders = response.getAllHeaders();String result = EntityUtils.toString(response.getEntity());response.close();return result;}public String post(String url, Map<String, String> params) throws ClientProtocolException, IOException {HttpPost httppost = new HttpPost(url);List<BasicNameValuePair> nameValuePairList = toNameValuePairList(params);httppost.setEntity(new UrlEncodedFormEntity(nameValuePairList,"UTF-8"));CloseableHttpResponse response = httpclient.execute(httppost, context);responseHeaders = response.getAllHeaders();String result = EntityUtils.toString(response.getEntity());response.close();return result;}public String post(String url, List<Header> headers, Map<String, String> params) throws ClientProtocolException, IOException {httpclient = httpclientBuilder.disableCookieManagement().setDefaultHeaders(headers).build();HttpPost httppost = new HttpPost(url);List<BasicNameValuePair> nameValuePairList = toNameValuePairList(params);httppost.setEntity(new UrlEncodedFormEntity(nameValuePairList,"UTF-8"));CloseableHttpResponse response = httpclient.execute(httppost, context);responseHeaders = response.getAllHeaders();String result = EntityUtils.toString(response.getEntity());response.close();return result;}public InputStream execute(String url) throws ClientProtocolException, IOException {HttpPost httppost = new HttpPost(url);CloseableHttpResponse response = httpclient.execute(httppost, context);responseHeaders = response.getAllHeaders();InputStream is = response.getEntity().getContent();return is;}public List<Header> getResponseHeader(String name) {List<Header> hs = new ArrayList<Header>();for (Header header : responseHeaders) {String n = header.getName();//String v = header.getValue();if (n.equals(name)) {hs.add(header);}}return hs;}public void close() throws IOException {this.httpclient.close();}public CloseableHttpClient getHttpclient() {return httpclient;}public HttpContext getContext() {return context;}public Header[] getResponseHeaders() {return responseHeaders;}public HttpClientBuilder getHttpclientBuilder() {return httpclientBuilder;}//示例@SuppressWarnings("unused")private static void main(String[] args) throws ClientProtocolException, IOException {SimpleHttpClient hc = new SimpleHttpClient();String url = "http://xxxxxxxxxxxxxxxxxx";Map<String, String> params = new HashMap<String, String>();params.put("phone", "1380003333");params.put("captcha", "abcde");String result = hc.post(url, params);System.out.println(result);}}