HttpRequest doPost doGet

说明：这个是java后端发送请求的 代码文章

请求分为 get请求和post请求

public class HttpRequestUtil{
private final static int success=200;

public static String doput(String url,Map map,String charset){
	  // HttpClient Http请求的实例集合   
	  //HttpClient httpClient =new HttpClient();   //new 一个也可以
	  HttpClient httpClient =HttpClients.createDefault();  //工具类创建一个HttpClient对象
	  HttpPut httpPut=new  HttpPut(url);
	  List pam=new ArraList ();
	  for(String key:map.keyset()){
	  	pam.add(new BasicNamevaluePair(key,map.get(key)));
	  }
	  UrlEncodedFormEntity entity new UrlEncodedFormEntity(pam,charset);
	  httpPut.setEntity(entity);
	  HttpResponse response=httyClient.execute(httpPut);
	  if(response.getStatusLine.getStatusCode()==success){
	  		HttpEntity httpEntity=response.getEntity();
	  		String result=EntityUtils.toString(httpEntity);
	  		return result;
	  }
	  
}
 

public static String doPost(String url ,Map map,String charset){
	HttpPost post=null;
	HttpEntity entity=null;
	CloseableHttpClient client=null;
	CloseHttpResponse response=null;
	int timeout=20000;
	List pair=new ArrayList();
	 for(String key:map.keyset()){
	  	pair.add(new BasicNamevaluePair(key,map.get(key)));
	  }
	  post = new HttpPost(url);
      RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(20000)
                .setSocketTimeout(20000).setConnectTimeout(10000).build();
	post.setConfig(requestConfig);
	post.setEntity(new UrlEncodeFormEntity(pair,charset));	
	response=client.execute(post);
	 if(response.getStatusLine.getStatusCode()==success){
	  		entity=response.getEntity();
	  		String result=EntityUtils.toString(entity);
	  response.close();
	  post.releaseConnection();
	  client.close();
	  return result;
	  }

}

public static String doGet(String url,Map map,String charset){
CloseableHttpClient client=null;
CloseableHttpResponse response=null;
HttpGet httpGet=null;
HttpEntity entity=null;
int timeout=30000;
List pairs=new ArrayList();
for(String key:map.keyset()){
pairs.add(new BasicNamevaluePair(key,map.get(key)));
}
url+="?"+EntityUtils.toString(new UrlEncodedFormEntity(pairs,charset));
httpGet=new HttpGet(url);
RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(10000)
.setSocketTimeout(30000).setConnectTimeout(20000).build();
httpGet.setConfig(requestConfig);
response=client.execute(httpGet);
if(response.getStatusLine.getStatusCode()==success){
entity=response.getEntity();
String result=EntityUtils.toString(entity);
response.close();
httpGet.releaseConnection();
client.close();
return result;
}
}

}