httpclint4.3 post数据到远程终端。

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我用的httpclient是4.3版本

需要下载以下包：httpclient-4.3.3.jar,httpcore-4.3.2.jar。下面是post数据到远端，并读取返回内容。

package httputil;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.util.ArrayList;import java.util.List;import net.sf.json.JSONObject;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.message.BasicNameValuePair;import org.apache.http.client.ClientProtocolException;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;public final class HttpUtil {private CloseableHttpClient httpClient;private HttpPost httpPost;public void doPost(String jsonString) throws ClientProtocolException,IOException {httpClient = HttpClients.createDefault();httpPost = new HttpPost("http://192.168.1.218/");List <NameValuePair> data = new ArrayList <NameValuePair>();data.add(new BasicNameValuePair("message", jsonString));httpPost.setEntity(new UrlEncodedFormEntity(data));HttpResponse httpResponse = httpClient.execute(httpPost);int httpCode = httpResponse.getStatusLine().getStatusCode();if (httpCode == HttpURLConnection.HTTP_OK && httpResponse != null) {HttpEntity entity = httpResponse.getEntity();InputStream inputStream = entity.getContent();InputStreamReader inputStreamReader = new InputStreamReader(inputStream,"UTF-8");BufferedReader reader = new BufferedReader(inputStreamReader);// 读字符串用的。String s;while (((s = reader.readLine()) != null)) {System.out.println(s);}reader.close();// 关闭输入流} else {}}public static void main(String[] args) throws ClientProtocolException,IOException {long taskid = 111L;String tableName = "sqltable";JSONObject jsonStatus = new JSONObject();jsonStatus.put("code", 0);jsonStatus.put("msg", "succ");// ===========================JSONObject jsonData = new JSONObject();jsonData.put("taskid", taskid);jsonData.put("tableName", tableName);// ===========================JSONObject objData = new JSONObject();objData.put("status", jsonStatus);objData.put("data", jsonData);HttpUtil http = new HttpUtil();http.doPost(objData.toString());}}

httpclient4.3和以前的变化较大，很多以前的例子都不能用了。另外下面这段代码就post不成功，没找到原因。(对照上面代码)

httpClient = HttpClients.createDefault();httpPost = new HttpPost("http://192.168.1.218/");//List <NameValuePair> data = new ArrayList <NameValuePair>();//data.add(new BasicNameValuePair("message", jsonString));StringEntity data=new StringEntity(jsonString);httpPost.setEntity(data);HttpResponse httpResponse = httpClient.execute(httpPost);

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