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CloseableHttpResponse的使用
基本逻辑是:
1、定义一个客户端
2、定义一个方法(GET,POST等)
3,、客户端执行这个方法并返回内容
/* * ==================================================================== * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. * */import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.URI;import java.util.List;import org.apache.http.HttpEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpUriRequest;import org.apache.http.client.methods.RequestBuilder;import org.apache.http.cookie.Cookie;import org.apache.http.impl.client.BasicCookieStore;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.util.EntityUtils;/** * A example that demonstrates how HttpClient APIs can be used to perform * form-based logon. */public class ClientFormLogin { public static void main(String[] args) throws Exception { BasicCookieStore cookieStore = new BasicCookieStore(); CloseableHttpClient httpclient = HttpClients.custom() .setDefaultCookieStore(cookieStore) .build(); try { HttpGet httpget = new HttpGet("http://..."); CloseableHttpResponse response1 = httpclient.execute(httpget); try { HttpEntity entity = response1.getEntity(); System.out.println("Login form get: " + response1.getStatusLine()); System.out.println("Initial set of cookies:"); List<Cookie> cookies = cookieStore.getCookies(); if (cookies.isEmpty()) { System.out.println("None"); } else { for (int i = 0; i < cookies.size(); i++) { System.out.println("- " + cookies.get(i).toString()); } } //输出网页源码 String result = EntityUtils.toString(response1.getEntity(), "utf-8"); System.out.println(result);
// 关闭EntityUtils
EntityUtils.consume(entity);
} finally { response1.close(); } HttpUriRequest login = RequestBuilder.post() .setUri(new URI("https://someportal/")) .addParameter("IDToken1", "username") .addParameter("IDToken2", "password") .build(); CloseableHttpResponse response2 = httpclient.execute(login); try { HttpEntity entity = response2.getEntity(); System.out.println("Login form get: " + response2.getStatusLine()); EntityUtils.consume(entity); System.out.println("Post logon cookies:"); List<Cookie> cookies = cookieStore.getCookies(); if (cookies.isEmpty()) { System.out.println("None"); } else { for (int i = 0; i < cookies.size(); i++) { System.out.println("- " + cookies.get(i).toString()); } } } finally { response2.close(); } } finally { httpclient.close(); } } private static String getStringFromInputStream(InputStream is) throws IOException { // TODO Auto-generated method stub ByteArrayOutputStream baos = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len =-1; try { while((len = is.read(buffer))!= -1){ baos.write(buffer,0,len); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } is.close(); String html = baos.toString(); baos.close(); return html; } }
CloseableHttpResponse的使用
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