HttpURLConnection访问url的工具类

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
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.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;/**
* HttpClientUtil
*/
public class HttpClientUtil { // 连接主机超时（30s）
public static final int HTTP_CONNECT_TIMEOUT_30S = 30 * 1000; // 从主机读取数据超时（3min）
public static final int HTTP_READ_TIMEOUT_3MIN = 180 * 1000; /**
* httpPost
*/
public static String httpPost(String url, String jsonParam) throws ClientProtocolException, IOException {
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(url); // 设置请求头和请求参数
if (null != jsonParam && !jsonParam.isEmpty()) {
StringEntity entity = new StringEntity(jsonParam, "utf-8");
entity.setContentEncoding("UTF-8");
entity.setContentType("application/json");
httpPost.setEntity(entity);
} // 超时时间设置
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(HTTP_READ_TIMEOUT_3MIN)
.setConnectTimeout(HTTP_CONNECT_TIMEOUT_30S).build();
httpPost.setConfig(requestConfig); // 发送请求
CloseableHttpResponse response = httpclient.execute(httpPost); // 获取返回内容
try {
HttpEntity entity = response.getEntity();
String str = EntityUtils.toString(entity);
EntityUtils.consume(entity); // 此句关闭了流
return str;
} finally {
response.close();
}
} /**
* httpPost get Cookies
*/
public static Map<String, Object> httpPostGetCookies(String url, String jsonParam) throws ClientProtocolException,
IOException {
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(url); // 设置请求头和请求参数
if (null != jsonParam && !jsonParam.isEmpty()) {
StringEntity entity = new StringEntity(jsonParam, "utf-8");
entity.setContentEncoding("UTF-8");
entity.setContentType("application/json");
httpPost.setEntity(entity);
} // 超时时间设置
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(HTTP_READ_TIMEOUT_3MIN)
.setConnectTimeout(HTTP_CONNECT_TIMEOUT_30S).build();
httpPost.setConfig(requestConfig); // 发送请求
CloseableHttpResponse response = httpclient.execute(httpPost); // 获取返回内容
try {
HttpEntity entity = response.getEntity();
String str = EntityUtils.toString(entity);
EntityUtils.consume(entity); // 此句关闭了流 // 获取数据内容
Map<String, Object> map = new HashMap<String, Object>();
map.put("result", str); // 获取返回到额Cookies
Header[] headers = response.getHeaders("Set-Cookie");
map.put("cookies", headers); return map;
} finally {
response.close();
}
} /**
* httpGet
*/
public static String httpGet(String url) throws ClientProtocolException, IOException {
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet(url); // 超时时间设置
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(HTTP_READ_TIMEOUT_3MIN)
.setConnectTimeout(HTTP_CONNECT_TIMEOUT_30S).build();
httpGet.setConfig(requestConfig); // 发送请求
CloseableHttpResponse response = httpclient.execute(httpGet); // 获取返回内容
try {
HttpEntity entity = response.getEntity();
String strResult = EntityUtils.toString(entity);
return strResult;
} finally {
response.close();
}
} /**
* httpGet with Cookies
*/
public static String httpGetWithCookies(String url, Header[] headers) throws ClientProtocolException, IOException {
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet(url); // 超时时间设置
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(HTTP_READ_TIMEOUT_3MIN)
.setConnectTimeout(HTTP_CONNECT_TIMEOUT_30S).build();
httpGet.setConfig(requestConfig); // 设置请求头
if (headers != null && headers.length > 0) {
httpGet.setHeaders(headers);
} // 发送请求
CloseableHttpResponse response = httpclient.execute(httpGet); // 获取返回内容
try {
HttpEntity entity = response.getEntity();
String strResult = EntityUtils.toString(entity);
return strResult;
} finally {
response.close();
}
}}