HttpClient4.5.1简单封装

<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>

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);
}
}