java 網絡請求_Java網絡請求工具類詳解

Java網絡請求工具類(依賴：org.apache.http;注：HttpClient 4.4,HttpCore 4.4)

到此處可以去下載下傳依賴包：http://hc.apache.org/downloads.cgi

import java.util.List;

import org.apache.http.HttpStatus;

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.HttpClients;

import org.apache.http.util.EntityUtils;

public class HttpServletUtil {

private static CloseableHttpClient httpclient;

private static RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(5000).setConnectTimeout(5000).build();

public static String doPost(List params, String url) throws Exception {

String result = null;

httpclient = HttpClients.createDefault();

HttpPost httpPost = new HttpPost(url);

httpPost.setEntity(new UrlEncodedFormEntity(params));

//設定請求和傳輸逾時時間

httpPost.setConfig(requestConfig);

CloseableHttpResponse httpResp = httpclient.execute(httpPost);

try {

int statusCode = httpResp.getStatusLine().getStatusCode();

// 判斷是夠請求成功

if (statusCode == HttpStatus.SC_OK) {

System.out.println("狀态碼:" + statusCode);

System.out.println("請求成功!");

// 擷取傳回的資料

result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");

} else {

System.out.println("狀态碼:"

+ httpResp.getStatusLine().getStatusCode());

System.out.println("HttpPost方式請求失敗!");

}

} finally {

httpResp.close();

httpclient.close();

}

return result;

}

public static String doGet(String url) throws Exception{

String result = null;

httpclient = HttpClients.createDefault();

HttpGet httpGet = new HttpGet(url);

//設定請求和傳輸逾時時間

httpGet.setConfig(requestConfig);

CloseableHttpResponse httpResp = httpclient.execute(httpGet);

try {

int statusCode = httpResp.getStatusLine().getStatusCode();

// 判斷是夠請求成功

if (statusCode == HttpStatus.SC_OK) {

System.out.println("狀态碼:" + statusCode);

System.out.println("請求成功!");

// 擷取傳回的資料

result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");

} else {

System.out.println("狀态碼:"

+ httpResp.getStatusLine().getStatusCode());

System.out.println("HttpGet方式請求失敗!");

}

} finally {

httpResp.close();

httpclient.close();

}

return result;

}

}