java使用common-httpclient包实现post请求方法示例

import java.io.BufferedReader;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.URL;import java.net.URLConnection;import java.util.List;import java.util.Map;import java.util.zip.GZIPInputStream;import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.HttpMethod;import org.apache.commons.httpclient.NameValuePair;import org.apache.commons.httpclient.methods.GetMethod;import org.apache.commons.httpclient.methods.PostMethod;import org.apache.commons.httpclient.methods.RequestEntity;import org.apache.commons.httpclient.methods.StringRequestEntity;import org.apache.commons.io.IOUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class HTTPUtils { private static Logger logger = LoggerFactory.getLogger(HTTPUtils.class); /**  * post请求  * @param url  * @param json  * @return  */ public static String postJosnContent(String url, String Json) throws Exception {//  HttpPost method = new HttpPost(url); //  DefaultHttpClient httpClient = new DefaultHttpClient(); //  String ret = null;//  try {//   StringEntity entity = new StringEntity(Json,"UTF-8");//解决中文乱码问题  //    entity.setContentEncoding("UTF-8"); //    entity.setContentType("application/json");//    method.setEntity(entity); //    HttpResponse result = httpClient.execute(method); //    ret = EntityUtils.toString(result.getEntity()); //  } catch (Exception e) {//   throw e;//  } finally {//   method.releaseConnection();//  }//  return ret;  logger.error("请求接口参数：" + Json);  PostMethod method = new PostMethod(url);  HttpClient httpClient = new HttpClient();  try {   RequestEntity entity = new StringRequestEntity(Json,"application/json","UTF-8");   method.setRequestEntity(entity);   httpClient.executeMethod(method);   logger.error("请求接口路径url：" + method.getURI().toString());   InputStream in = method.getResponseBodyAsStream();   //下面将stream转换为String   StringBuffer sb = new StringBuffer();   InputStreamReader isr = new InputStreamReader(in, "UTF-8");   char[] b = new char[4096];   for(int n; (n = isr.read(b)) != -1;) {    sb.append(new String(b, 0, n));   }   String returnStr = sb.toString();   return returnStr;  } catch (Exception e) {   e.printStackTrace();   throw e;  } finally {   method.releaseConnection();  } }}