xiaoxin 使用Apache HTTPClient，并以JSON为参数进行POST请求(转载)

注：这是httpclient4,httpclient4与3用法有很大差别

package org.ssi.util;

 

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

 

import net.sf.json.JSONArray;

 

import org.apache.commons.lang.exception.ExceptionUtils;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.http.HttpResponse;

import org.apache.http.HttpStatus;

import org.apache.http.NameValuePair;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.protocol.HTTP;

import org.apache.http.util.EntityUtils;

 

 

public class APIHttpClient {

 

    //接口地址

    private String apiURL = "";

    private Log logger = LogFactory.getLog(this.getClass());

    private static final String pattern = "yyyy-MM-dd HH:mm:ss:SSS";

        private HttpClient httpClient = null;

    private HttpPost method = null;

    private long startTime = 0L;

    private long endTime = 0L;

    private int status = 0;

    /**

     * 接口地址

     * @param url

     */

    public APIHttpClient(String url){

 

        if(url != null)

        {

            this.apiURL = url;

        }

        if(apiURL != null)

        {

                    httpClient = new DefaultHttpClient();

                    method = new HttpPost(apiURL);

             

        }

    }

     

    /**

     * 调用 API

     * @param parameters

     * @return

     */

    public String post(String parameters)

    {

        String body = null;

                logger.info("parameters:" + parameters);

                 

                 

        if(method != null & parameters != null  && !"".equals(parameters.trim()))

        {

                    JSONArray jsonObject = JSONArray.fromObject(parameters);

                    logger.info("json:" + jsonObject.toString());

                    try{

 

                        List<NameValuePair> params=new ArrayList<NameValuePair>(); 

                        //建立一个NameValuePair数组，用于存储欲传送的参数 

                        params.add(new BasicNameValuePair("data",parameters)); 

                        //添加参数 

                        method.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8)); 

                         

                        startTime = System.currentTimeMillis();

                                 

                        //设置编码 

                        HttpResponse response=httpClient.execute(method); 

                        endTime = System.currentTimeMillis();

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

                        logger.info("statusCode:" + statusCode);

                         logger.info("调用API 花费时间(单位：毫秒)：" + (endTime - startTime));

                        if(statusCode != HttpStatus.SC_OK){

                            logger.error("Method failed:"+response.getStatusLine());

                            status = 1;

                        }

                         

                            //Read the response body

                             body=EntityUtils.toString(response.getEntity());

                         

            }catch(IOException e){

                //发生网络异常

                logger.error("exception occurred!\n"+ExceptionUtils.getFullStackTrace(e));

                //网络错误

                status = 3;

            }

                    finally{

                        logger.info("调用接口状态：" + status);

                    }

                     

             

        }

        return body;

    }

 

    /**

     * 0.成功 1.执行方法失败 2.协议错误 3.网络错误

     * @return the status

     */

    public int getStatus() {

        return status;

    }

 

    /**

     * @param status the status to set

     */

    public void setStatus(int status) {

        this.status = status;

    }

    /**

     * @return the startTime

     */

    public long getStartTime() {

        return startTime;

    }

    /**

     * @return the endTime

     */

    public long getEndTime() {

        return endTime;

    }

}

 

原文地址：http://www.oschina.net/code/snippet_242695_20850