刚写出来的，还未经测试，

HttpUtil.java

import java.io.IOException;

import java.io.UnsupportedEncodingException;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

import net.sf.json.JSONObject;

import org.apache.commons.lang.StringUtils;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.http.HttpEntity;

import org.apache.http.HttpStatus;

import org.apache.http.NameValuePair;

import org.apache.http.ParseException;

import org.apache.http.client.ClientProtocolException;

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.client.utils.URLEncodedUtils;

import org.apache.http.entity.StringEntity;

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;

/**

* HTTP工具类

* 发送http/https协议get/post请求，发送map，json，xml，txt数据

* @author happyqing

* @since 2017-04-08

*/

public final class HttpUtil {

private static Log log = LogFactory.getLog(HttpUtil.class);

/**

* 执行一个http/https get请求，返回请求响应的文本数据

*

* @param url请求的URL地址，可以带参数?param1=a&parma2=b

* @param headerMap请求头参数map，可以为null

* @param paramMap请求参数map，可以为null

* @param charset字符集

* @param pretty是否美化

* @return 返回请求响应的文本数据

*/

public static String doGet(String url, Map headerMap, Map paramMap, String charset, boolean pretty) {

//StringBuffer contentSb = new StringBuffer();

String responseContent = "";

// http客户端

CloseableHttpClient httpclient = null;

// Get请求

HttpGet httpGet = null;

// http响应

CloseableHttpResponse response = null;

try {

if(url.startsWith("https")){

httpclient = HttpsSSLClient.createSSLInsecureClient();

} else {

httpclient = HttpClients.createDefault();

}

// 设置参数

if (paramMap != null) {

List nvps = new ArrayList ();

for (Map.Entry entry : paramMap.entrySet()) {

nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));

}

//EntityUtils.toString(new UrlEncodedFormEntity(nvps, charset));

url = url + "?" + URLEncodedUtils.format(nvps, charset);

}

// Get请求

httpGet = new HttpGet(url); // HttpUriRequest httpGet

// 设置header

if (headerMap != null) {

for (Map.Entry entry : headerMap.entrySet()) {

httpGet.addHeader(entry.getKey(), entry.getValue());

}

}

// 发送请求，返回响应

response = httpclient.execute(httpGet);

if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

HttpEntity entity = response.getEntity();

//BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), charset));

// String line;

// while ((line = reader.readLine()) != null) {

// if (pretty)

// contentSb.append(line).append(System.getProperty("line.separator"));

// else

// contentSb.append(line);

// }

//reader.close();

responseContent = EntityUtils.toString(entity, charset);

}

// EntityUtils.consume(entity);

} catch (ClientProtocolException e) {

log.error(e.getMessage(), e);

} catch (IOException e) {

log.error(e.getMessage(), e);

} catch (ParseException e) {

log.error(e.getMessage(), e);

} finally {

try {

if(response!=null){

response.close();

}

if(httpGet!=null){

httpGet.releaseConnection();

}

if(httpclient!=null){

httpclient.close();

}

} catch (IOException e) {

log.error(e.getMessage(), e);

}

}

return responseContent;

}

/**

* 执行一个http/https post请求，返回请求响应的文本数据

*

* @param url请求的URL地址，可以带参数?param1=a&parma2=b

* @param headerMap请求头参数map，可以为null

* @param paramMap请求参数map，可以为null

* @param charset字符集

* @param pretty是否美化

* @return 返回请求响应的文本数据

*/

public static String doPost(String url, Map headerMap, Map paramMap, String charset, boolean pretty) {

//StringBuffer contentSb = new StringBuffer();

String responseContent = "";

// http客户端

CloseableHttpClient httpclient = null;

// Post请求

HttpPost httpPost = null;

// http响应

CloseableHttpResponse response = null;

try {

if(url.startsWith("https")){

httpclient = HttpsSSLClient.createSSLInsecureClient();

} else {

httpclient = HttpClients.createDefault();

}

// Post请求

httpPost = new HttpPost(url);

// 设置header

if (headerMap != null) {

for (Map.Entry entry : headerMap.entrySet()) {

httpPost.addHeader(entry.getKey(), entry.getValue());

}

}

// 设置参数

if (paramMap != null) {

List nvps = new ArrayList ();

for (Map.Entry entry : paramMap.entrySet()) {

nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));

}

httpPost.setEntity(new UrlEncodedFormEntity(nvps, charset));

}

// 发送请求，返回响应

response = httpclient.execute(httpPost);

if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

HttpEntity entity = response.getEntity();

//BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), charset));

// String line;

// while ((line = reader.readLine()) != null) {

// if (pretty)

// contentSb.append(line).append(System.getProperty("line.separator"));

// else

// contentSb.append(line);

// }

//reader.close();

responseContent = EntityUtils.toString(entity, charset);

}

// EntityUtils.consume(entity);

} catch (UnsupportedEncodingException e) {

log.error(e.getMessage(), e);

} catch (ClientProtocolException e) {

log.error(e.getMessage(), e);

} catch (IOException e) {

log.error(e.getMessage(), e);

} catch (ParseException e) {

log.error(e.getMessage(), e);

} finally {

try {

if(response!=null){

response.close();

}

if(httpPost!=null){

httpPost.releaseConnection();

}

if(httpclient!=null){

httpclient.close();

}

} catch (IOException e) {

log.error(e.getMessage(), e);

}

}

return responseContent;

}

/**

* 执行一个http/https post请求， 直接写数据 json,xml,txt

*

* @param url请求的URL地址

* @param headerMap请求头参数map，可以为null

* @param contentjson或xml等字符串内容

* @param charset字符集

* @param pretty是否美化

* @return返回请求响应的文本数据

*/

public static String writePost(String url, Map headerMap, String content, String charset, boolean pretty) {

//StringBuffer contentSb = new StringBuffer();

String responseContent = "";

// http客户端

CloseableHttpClient httpclient = null;

// Post请求

HttpPost httpPost = null;

// http响应

CloseableHttpResponse response = null;

try {

if(url.startsWith("https")){

httpclient = HttpsSSLClient.createSSLInsecureClient();

} else {

httpclient = HttpClients.createDefault();

}

// Post请求

httpPost = new HttpPost(url);

// 设置header

if (headerMap != null) {

for (Map.Entry entry : headerMap.entrySet()) {

httpPost.addHeader(entry.getKey(), entry.getValue());

}

}

// 字符串Entity

StringEntity stringEntity = new StringEntity(content, charset);

stringEntity.setContentType("text/plain"); //application/json,text/xml,text/plain

httpPost.setEntity(stringEntity);

// 发送请求，返回响应

response = httpclient.execute(httpPost);

if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

HttpEntity entity = response.getEntity();

//BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), charset));

// String line;

// while ((line = reader.readLine()) != null) {

// if (pretty)

// contentSb.append(line).append(System.getProperty("line.separator"));

// else

// contentSb.append(line);

// }

//reader.close();

responseContent = EntityUtils.toString(entity, charset);

}

// EntityUtils.consume(entity);

} catch (UnsupportedEncodingException e) {

log.error(e.getMessage(), e);

} catch (ClientProtocolException e) {

log.error(e.getMessage(), e);

} catch (IOException e) {

log.error(e.getMessage(), e);

} catch (ParseException e) {

log.error(e.getMessage(), e);

} finally {

try {

if(response!=null){

response.close();

}

if(httpPost!=null){

httpPost.releaseConnection();

}

if(httpclient!=null){

httpclient.close();

}

} catch (IOException e) {

log.error(e.getMessage(), e);

}

}

return responseContent;

}

// 通过code获取openId

public static String getOpenId(String code) {

if (StringUtils.isNotEmpty(code)) {

String appid = PropertiesUtil.getProperty("wx.appid");

String secret = PropertiesUtil.getProperty("wx.appsecret");

String result = HttpUtil.doGet("https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + appid + "&secret=" + secret + "&code=" + code + "&grant_type=authorization_code", null, null, "UTF-8",true);

if (StringUtils.isNotEmpty(result)) {

JSONObject json = JSONObject.fromObject(result);

if (json.get("openid") != null) {

return json.get("openid").toString();

}

}

}

return "";

}

public static void main(String[] args) {

try {

String y = doGet("http://video.sina.com.cn/life/tips.html", null, null, "GBK", true);

System.out.println(y);

// String accessToken = HttpUtil.doGet("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=appid&secret=secret", null, null, "UTF-8", true);

// System.out.println(accessToken);

// Map params = new HashMap();

// params.put("param1", "value1");

// params.put("json", "{\"aa\":\"11\"}");

// String j = doPost("http://localhost/uplat/manage/test.do?reqCode=add", null, params, "UTF-8", true);

// System.out.println(j);

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

HttpsSSLClient.java

import java.security.KeyManagementException;

import java.security.NoSuchAlgorithmException;

import java.security.SecureRandom;

import java.security.cert.CertificateException;

import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;

import javax.net.ssl.SSLContext;

import javax.net.ssl.SSLSession;

import javax.net.ssl.TrustManager;

import javax.net.ssl.X509TrustManager;

import org.apache.http.conn.ssl.SSLConnectionSocketFactory;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

/**

* 创建httpsclient

* @author happyqing

* @since 2017-04-07

*/

public class HttpsSSLClient {

/**

* 获取Https 请求客户端

* @return

*/

public static CloseableHttpClient createSSLInsecureClient() {

SSLContext sslcontext = createSSLContext();

SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new HostnameVerifier() {

@Override

public boolean verify(String paramString, SSLSession paramSSLSession) {

return true;

}

});

CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();

return httpclient;

}

/**

* 获取初始化SslContext

* @return

*/

private static SSLContext createSSLContext() {

SSLContext sslcontext = null;

try {

sslcontext = SSLContext.getInstance("TLS");

sslcontext.init(null, new TrustManager[] {new TrustAnyTrustManager()}, new SecureRandom());

} catch (NoSuchAlgorithmException e) {

e.printStackTrace();

} catch (KeyManagementException e) {

e.printStackTrace();

}

return sslcontext;

}

/**

* 自定义静态私有类

*/

private static class TrustAnyTrustManager implements X509TrustManager {

public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {}

public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {}

public X509Certificate[] getAcceptedIssuers() {

return new X509Certificate[] {};

}

}

}

参考：

httpclient4.x处理https协议请求

http://www.oschina.net/code/snippet_2376242_50816#74195

HttpClient_4 用法 由HttpClient_3 升级到 HttpClient_4 必看

http://www.cnblogs.com/loveyakamoz/archive/2011/07/21/2113252.html

用httpclient4.x 发送http get post请求。

http://blog.csdn.net/sunny243788557/article/details/8106265

HttpClient-4.3.X 中get和post方法使用

http://www.cnblogs.com/520playboy/p/6344940.html

HttpGet &&HttpPost方法发送header,params, Content

http://blog.csdn.net/fhlkm/article/details/7844509

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