HttpClient调用Web Api接口帮助类

package com.utils;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.omg.CORBA.NameValuePair;

import java.io.IOException;
import java.nio.charset.Charset;
import java.util.List;
import java.util.logging.Logger;

/**
* Author:   linjunit
* Version：
* Date:     2017/11/13 0013
* Description: 调用web api接口数据类
* Modification  History:
* Date            Author            Version            Description
* --------------------------------------------------------------
* Why & What is modified:
*/
public class HttpRequest {
private static org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger(HttpRequest.class);
public static String do_post(String url, String param) throws IOException {
String body = "{}";
DefaultHttpClient httpclient = new DefaultHttpClient();
try {
HttpPost httpost = new HttpPost(url);
StringEntity entity = new StringEntity(param, "utf-8");
entity.setContentEncoding("UTF-8");
entity.setContentType("application/json");
httpost.setEntity(entity);
HttpResponse response = httpclient.execute(httpost);
if(response.getStatusLine().getStatusCode()==200){
try{
body = EntityUtils.toString(entity);
}catch (Exception ex){
logger.error("post调用失
4000
败，url:"+url,ex);
}
}

} finally {
httpclient.getConnectionManager().shutdown();
}
return body;
}
public static String do_get(String url) throws ClientProtocolException, IOException {
String body = "{}";
DefaultHttpClient httpclient = new DefaultHttpClient();
try {
HttpGet httpget = new HttpGet(url);
HttpResponse response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
body = EntityUtils.toString(entity);
} finally {
httpclient.getConnectionManager().shutdown();
}
return body;
}
}