Two ways to send url request to get the return value

The following two methods will use Java to send url requests and get the value returned by the server.

The first method:

The code copy is as follows:

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

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

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.params.CoreConnectionPNames;

import org.apache.http.util.EntityUtils;

publicstaticStringsendUrlRequest(StringurlStr,Stringparam1,Stringparam2)throwsException{

StringtempStr=null;

HttpClienthttpclient=newDefaultHttpClient();

Propertiesproperties=newProperties();

HttpEntityentity=null;

StringxmlContent="";

try

{

//Set the timeout time

httpclient.getParams().setIntParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,20000);

httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,20000);

//Encapsulation of parameters that need to be passed

List<NameValuePair>nvps=newArrayList<NameValuePair>();

nvps.add(newBasicNameValuePair("mainMemoCode",strmainMemoCode));

nvps.add(newBasicNameValuePair("recordPassWord",strrecordPassWord));

//Client request method type

HttpPosthttpPost=newHttpPost(urlStr);

httpPost.setEntity(newUrlEncodedFormEntity(nvps,"GBK"));

HttpResponsesponse=httpclient.execute(httpPost);

//Get the value of the Content-Type that the server returns to Http

tempStr=response.getHeaders("Content-Type")[0].getValue().toString();

//Get the value of the page returned by the server

entity=response.getEntity();

xmlContent=EntityUtils.toString(entity);

Stringstrmessage=null;

System.out.println(xmlContent);

System.out.println(response.getHeaders("Content-Type")[0].getValue().toString());

httpPost.abort();

}

catch(SocketTimeoutExceptione)

{

}

catch(Exceptionex)

{

ex.printStackTrace();

}

Finally{

httpclient.getConnectionManager().shutdown();

}

The second method:

The code copy is as follows:

publicstaticStringsendUrlRequest(StringurlStr,Stringparam1,Stringparam2)throwsException{

HttpURLConnectionurl_con=null;

try{

URLurl=newURL(urlStr);

StringBufferbankXmlBuffer=newStringBuffer();

//Create URL connection, submit to data, and get the return result

HttpURLConnectionconnection=(HttpURLConnection)url.openConnection();

connection.setRequestMethod("POST");

connection.setDoOutput(true);

connection.setRequestProperty("User-Agent","directclient");

PrintWriterout=newPrintWriter(newOutputStreamWriter(connection.getOutputStream(),"GBK"));

out.println(param);

out.close();

BufferedReaderin=newBufferedReader(newInputStreamReader(connection

.getInputStream(),"GBK"));

StringinputLine;

while((inputLine=in.readLine())!=null){

bankXmlBuffer.append(inputLine);

}

in.close();

tempStr=bankXmlBuffer.toString();

}

catch(Exceptione)

{

System.out.println("Exception occurred when sending GET request!" +e);

e.printStackTrace();

} finally{

if(url_con!=null)

url_con.disconnect();

}

returnmpeStr;

}