com.lxf.spider.client.QuickStart.java Source code

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Here is the source code for com.lxf.spider.client.QuickStart.java

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/*
 * ====================================================================
 * 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/>.
 *
 */
package com.lxf.spider.client;

import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
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.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class QuickStart {

    public static void main(String[] args) throws Exception {
        InputStream input = null;
        OutputStream output = null;
        //httpclient
        CloseableHttpClient httpclient = HttpClients.createDefault();
        try {
            //get
            HttpGet httpGet = new HttpGet("http://127.0.0.1:8080/pdqx.jc.web/cen/center.html");
            //
            CloseableHttpResponse response1 = httpclient.execute(httpGet);

            // The underlying HTTP connection is still held by the response object
            // to allow the response content to be streamed directly from the network socket.
            // In order to ensure correct deallocation of system resources
            // the user MUST call CloseableHttpResponse#close() from a finally clause.
            // Please note that if response content is not fully consumed the underlying
            // connection cannot be safely re-used and will be shut down and discarded
            // by the connection manager.
            try {
                //???
                int statusCode = response1.getStatusLine().getStatusCode();
                //??200?
                if (statusCode == HttpStatus.SC_OK) {
                    //                  input = httpGet.getRequestLine();
                    System.out.println(response1.getStatusLine());
                    //
                    HttpEntity entity1 = response1.getEntity();
                    // do something useful with the response body
                    // and ensure it is fully consumed
                    input = entity1.getContent();
                    output = new FileOutputStream("d:/lxf.data");
                    //?
                    int tempByte = -1;
                    while ((tempByte = input.read()) > 0) {
                        output.write(tempByte);
                    }
                    EntityUtils.consume(entity1);
                    //?
                    if (input != null) {
                        input.close();
                    }
                    if (output != null) {
                        output.close();
                    }
                }

            } finally {
                response1.close();
            }

            /*HttpPost httpPost = new HttpPost("http://targethost/login");
            List <NameValuePair> nvps = new ArrayList <NameValuePair>();
            nvps.add(new BasicNameValuePair("username", "vip"));
            nvps.add(new BasicNameValuePair("password", "secret"));
            httpPost.setEntity(new UrlEncodedFormEntity(nvps));
            CloseableHttpResponse response2 = httpclient.execute(httpPost);
                
            try {
            System.out.println(response2.getStatusLine());
            HttpEntity entity2 = response2.getEntity();
            // do something useful with the response body
            // and ensure it is fully consumed
            EntityUtils.consume(entity2);
            } finally {
            response2.close();
            }*/
        } finally {
            httpclient.close();
        }
    }

}