HttpClient4.5.1简单封装

from:HttpClient4.5.1简单封装
See Also:轻松把玩HttpClient


摘要: HttpClient的简单封装，主要是方便自己在开发小工具的时候是使用。

1、maven依赖：
<dependency>
 <groupId>org.apache.httpcomponents</groupId>
 <artifactId>httpclient</artifactId>
 <version>4.5.1</version>
</dependency>
<dependency>
 <groupId>commons-io</groupId>
 <artifactId>commons-io</artifactId>
 <version>2.4</version>
</dependency>

2、HttpUtils.java：

package com.hjr.demo.util.http;

import java.io.IOException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.StringUtils;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
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.BasicHeader;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.Logger;

/**
 * Http工具类
 * 
 * @author hjr
 * @date 2016年2月24日 下午1:45:03
 */
public class HttpUtils {
 private static final Logger LOGGER = Logger.getLogger(HttpUtils.class);

 /**
  * TODO 链接配置
  * TODO 文件下载请求封装
  * TODO GET请求封装
  * 
  */
 
 /**
  * post请求
  * 
  * @param url 请求链接
  * @param params 请求参数
  * @param headers 请求头
  * @return
  */
 public static String post(String url, Map<String, Object> params, Map<String, Object> headers) {
  return post(url, params, headers, null, null);
 }
 
 /**
  * post请求
  * 
  * @param url 请求链接
  * @param params 请求参数
  * @param headers 请求头
  * @param hostname 请求代理域名或ip
  * @param port 请求代理端口
  * @return
  */
 public static String post(String url, Map<String, Object> params, Map<String, Object> headers, String hostname,
   Integer port) {
  return post(url, params, headers, hostname, port);
 }

 /**
  * post请求
  * 
  * @param url 请求链接
  * @param params 请求参数
  * @param headers 请求头
  * @param hostname 请求代理域名或ip
  * @param port 请求代理端口
  * @param scheme
  * @return
  */
 public static String post(String url, Map<String, Object> params, Map<String, Object> headers, String hostname,
   Integer port, String scheme) {
  HttpResponse response = null;
  String responseBody = null;
  try {
   if (StringUtils.isBlank(hostname) || port == null) {
    response = postRaw(url, params, headers, null);
   } else {
    HttpHost proxy = new HttpHost(hostname, port, scheme);
    response = postRaw(url, params, headers, proxy);
   }
   HttpEntity entity = response.getEntity();
   responseBody = EntityUtils.toString(entity, "UTF-8");
  } catch (Exception e) {
   LOGGER.error("Http post error!", e);
  } finally {
   if (response != null) {
    try {
     EntityUtils.consume(response.getEntity());
    } catch (IOException e) {
     LOGGER.error("Consume response entity error!", e);
    }
   }
  }

  return responseBody;
 }

 /**
  * post请求
  * 
  * @param url 请求链接
  * @param params 请求参数
  * @param headers 请求头
  * @return
  * @throws Exception
  */
 public static HttpResponse postRaw(String url, Map<String, Object> params, Map<String, Object> headers) throws Exception {
  return postRaw(url, params, headers, null);
 }
 
 /**
  * post请求
  * 
  * @param url 请求链接
  * @param params 请求参数
  * @param headers 请求头
  * @param hostname 请求代理域名或ip
  * @param port 请求代理端口
  * @return
  * @throws Exception
  */
 public static HttpResponse postRaw(String url, Map<String, Object> params, Map<String, Object> headers,
   String hostname, int port) throws Exception {
  return postRaw(url, params, headers, hostname, port, "http");
 }

 /**
  * post请求
  * 
  * @param url 请求链接
  * @param params 请求参数
  * @param headers 请求头
  * @param hostname 请求代理域名或ip
  * @param port 请求代理端口
  * @param scheme 协议
  * @return
  * @throws Exception
  */
 public static HttpResponse postRaw(String url, Map<String, Object> params, Map<String, Object> headers,
   String hostname, Integer port, String scheme) throws Exception {
  HttpHost proxy = new HttpHost(hostname, port, scheme);
  return postRaw(url, params, headers, proxy);
 }

 /**
  * post请求
  * 
  * @param url 请求链接
  * @param params 请求参数
  * @param headers 请求头
  * @param proxy 请求代理
  * @return
  * @throws Exception
  */
 public static HttpResponse postRaw(String url, Map<String, Object> params, Map<String, Object> headers,
   HttpHost proxy) throws Exception {
  CloseableHttpClient httpClient = HttpClients.createDefault();
  HttpPost httpPost = new HttpPost(url);

  // 设置参数
  List<NameValuePair> pairList = new ArrayList<NameValuePair>(params.size());
  for (Map.Entry<String, Object> entry : params.entrySet()) {
   NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue().toString());
   pairList.add(pair);
  }
  httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("UTF-8")));

  // 设置请求头
  List<Header> headerList = new ArrayList<Header>(headers.size());
  for (Map.Entry<String, Object> entry : headers.entrySet()) {
   Header header = new BasicHeader(entry.getKey(), entry.getValue().toString());
   headerList.add(header);
  }
  httpPost.setHeaders(headerList.toArray(new Header[headers.size()]));

  // 设置代理
  if (proxy != null) {
   RequestConfig config = RequestConfig.custom().setProxy(proxy).build();
   httpPost.setConfig(config);
  }

  return httpClient.execute(httpPost);
 }
}


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