1. maven依赖包下载
<!-- httpclient --> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.2.1</version> </dependency>
2. HttpClientUtil.java
package com.snail.common.util; import java.io.IOException; import java.util.ArrayList; import java.util.List; import java.util.Map; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.ResponseHandler; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.BasicResponseHandler; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; /** * HttpClient调用工具类 * * @author penghuaiyi * @date 2014-04-04 */ public class HttpClientUtil { /** * 发送GET请求 * @param uri * @return */ public static String sendGet(String uri) { String responseBody = null; HttpClient httpClient = new DefaultHttpClient(); try { HttpGet httpGet = new HttpGet(uri); System.out.println("executing request " + httpGet.getURI()); // Create a response handler ResponseHandler<String> responseHandler = new BasicResponseHandler(); responseBody = httpClient.execute(httpGet, responseHandler); System.out.println("----------------------------------------"); System.out.println(responseBody); System.out.println("----------------------------------------"); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { httpClient.getConnectionManager().shutdown(); } return responseBody; } /** * 发送POST请求 * @param uri * @param paramMap 请求参数 * @return */ public static String sendPost(String uri, Map<String, String> paramMap) { return sendPost(uri, paramMap, null); } /** * 发送POST请求 * @param uri * @param paramMap 请求参数 * @param charset 参数编码 * @return */ public static String sendPost(String uri, Map<String, String> paramMap, String charset) { String responseBody = null; HttpClient httpClient = new DefaultHttpClient(); try { HttpPost httpPost = new HttpPost(uri); System.out.println("executing request " + httpPost.getURI()); if (paramMap != null) { List<NameValuePair> nvps = new ArrayList<NameValuePair>( paramMap.size()); for (Map.Entry<String, String> entry : paramMap.entrySet()) { NameValuePair nvp = new BasicNameValuePair(entry.getKey(), entry.getValue()); nvps.add(nvp); } if(charset!=null){ httpPost.setEntity(new UrlEncodedFormEntity(nvps,charset)); }else{ httpPost.setEntity(new UrlEncodedFormEntity(nvps)); } } // Create a response handler ResponseHandler<String> responseHandler = new BasicResponseHandler(); responseBody = httpClient.execute(httpPost, responseHandler); System.out.println("----------------------------------------"); System.out.println(responseBody); System.out.println("----------------------------------------"); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { httpClient.getConnectionManager().shutdown(); } return responseBody; } }