CloseableHttpResponse的使用

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基本邏輯是：

1、定義一個用戶端

2、定義一個方法（GET，POST等）

3,、用戶端執行這個方法並返回內容

 

/* * ==================================================================== * 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());                    }                }                                //輸出網頁源碼                           String result = EntityUtils.toString(response1.getEntity(), "utf-8");                  System.out.println(result);   

                // 關閉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 stubByteArrayOutputStream 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 blocke.printStackTrace();}is.close();String html = baos.toString();baos.close();return html;}}

　　

 

CloseableHttpResponse的使用