java使用httpclient发送post请求示例

java使用httpclient发送post请求示例

JAVA工程师介绍，代码如下：

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{

Listlt;NameValuePairgt; params=new ArrayListlt;NameValuePairgt;();

//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;

}

}