HttpClient 4.3 DEMO

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.apache.http.HttpEntity;
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.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.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
/**
* 基于 httpclient 4.3.1版本的 http工具类
* @author mcSui
*
*/
public class HttpToolkit {
private static final CloseableHttpClient httpClient;
public static final String CHARSET = "UTF-8";
static {
RequestConfig config = RequestConfig.custom().setConnectTimeout(60000).setSocketTimeout(15000).build();
httpClient = HttpClientBuilder.create().setDefaultRequestConfig(config).build();
}
public static String doGet(String url, Map<String, String> params){
return doGet(url, params,CHARSET);
}
public static String doPost(String url, Map<String, String> params){
return doPost(url, params,CHARSET);
}
/**
* HTTP Get 获取内容
* @param url  请求的url地址 ?之前的地址
* @param params	请求的参数
* @param charset	编码格式
* @return	页面内容
*/
public static String doGet(String url,Map<String,String> params,String charset){
if(StringUtils.isBlank(url)){
return null;
}
try {
if(params != null && !params.isEmpty()){
List<NameValuePair> pairs = new ArrayList<NameValuePair>(params.size());
for(Map.Entry<String,String> entry : params.entrySet()){
String value = entry.getValue();
if(value != null){
pairs.add(new BasicNameValuePair(entry.getKey(),value));
}
}
url += "?" + EntityUtils.toString(new UrlEncodedFormEntity(pairs, charset));
}
HttpGet httpGet = new HttpGet(url);
CloseableHttpResponse response = httpClient.execute(httpGet);
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode != 200) {
httpGet.abort();
throw new RuntimeException("HttpClient,error status code :" + statusCode);
}
HttpEntity entity = response.getEntity();
String result = null;
if (entity != null){
result = EntityUtils.toString(entity, "utf-8");
}
EntityUtils.consume(entity);
response.close();
return result;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* HTTP Post 获取内容
* @param url  请求的url地址 ?之前的地址
* @param params	请求的参数
* @param charset	编码格式
* @return	页面内容
*/
public static String doPost(String url,Map<String,String> params,String charset){
if(StringUtils.isBlank(url)){
return null;
}
try {
List<NameValuePair> pairs = null;
if(params != null && !params.isEmpty()){
pairs = new ArrayList<NameValuePair>(params.size());
for(Map.Entry<String,String> entry : params.entrySet()){
String value = entry.getValue();
if(value != null){
pairs.add(new BasicNameValuePair(entry.getKey(),value));
}
}
}
HttpPost httpPost = new HttpPost(url);
if(pairs != null && pairs.size() > 0){
httpPost.setEntity(new UrlEncodedFormEntity(pairs,CHARSET));
}
CloseableHttpResponse response = httpClient.execute(httpPost);
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode != 200) {
httpPost.abort();
throw new RuntimeException("HttpClient,error status code :" + statusCode);
}
HttpEntity entity = response.getEntity();
String result = null;
if (entity != null){
result = EntityUtils.toString(entity, "utf-8");
}
EntityUtils.consume(entity);
response.close();
return result;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static void main(String []args){
String getData = doGet("http://www.oschina.net/",null);
System.out.println(getData);
String postData = doPost("http://www.oschina.net/",null);
System.out.println(postData);
}

}