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();

   }

  }

}