java發送url請求獲取返回值的二種方法

下面提供二種方法會使用java發送url請求，並獲取服務器返回的值

第一種方法：

複製代碼代碼如下:

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

{

//設置超時時間

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

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

//封裝需要傳遞的參數

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

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

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

//客戶端的請求方法類型

HttpPosthttpPost=newHttpPost(urlStr);

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

HttpResponseresponse=httpclient.execute(httpPost);

//獲取服務器返回Http的Content-Type的值

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

//獲取服務器返回頁面的值

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();

}

第二種方法：

複製代碼代碼如下:

publicstaticStringsendUrlRequest(StringurlStr,Stringparam1,Stringparam2)throwsException{

HttpURLConnectionurl_con=null;

try{

URLurl=newURL(urlStr);

StringBufferbankXmlBuffer=newStringBuffer();

//創建URL連接，提交到數據，獲取返回結果

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("發送GET請求出現異常！"+e);

e.printStackTrace();

}finally{

if(url_con!=null)

url_con.disconnect();

}

returntmpeStr;

}