版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/qq_18895975/article/details/76084577
注意事项
实际测试中需要2个核心jar
httpclient-4.5.jar
httpcore-4.4.1.jar
版本尽量高,否则会出现低版本莫名的错误
使用的jar目录
httpclient-4.5.jar
httpcore-4.4.1.jar
以下的包是为了处理响应得到的Json
commons-beanutils-1.8.3.jar
commons-collections-3.2.1.jar
commons-lang-2.4.jar
commons-logging-1.1.1.jar
ezmorph-1.0.6.jar
json-lib-2.2.3.jar
案例代码
package com;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
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.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
/**
* @author wangjun
* @Description 远程接口案例
* 该工程同时集成了对JSONObject和JSONArray的支持
*/
@SuppressWarnings("deprecation")
public class TeleService{
/**
* 主函数
* */
public static void main(String[] args) {
String myPara="王";
if(null!=args && args.length>0){ myPara=args[0];}
String baseUrl = "http://www.baidu.com/s?";
Map<String,String> map=new HashMap<String,String>();
map.put("wd", myPara);
map.put("ie", "UTF-8");
System.out.println(TeleRequestMethod(baseUrl, map, "UTF-8", "UTF-8", "GET"));
}
/** HttpClient远程请求基本方法
* @param baseUrl 基础地址 http://www.baidu.com
* @param parm 其他参数组
* @param CharsetRequest 使用何种字符集编码请求参数 默认"UTF-8" "GBK" "ISO-8859-1"
* @param CharsetRequest 使用何种字符集解析响应得到字节流 默认"UTF-8" "GBK" "ISO-8859-1"
* @param RequestMethod "POST"和"GET"2种
* */
public static String TeleRequestMethod(String baseUrl,Map<String,String> parm,String CharsetRequest,String CharsetResponse,String RequestMethod) {
// HttpParams httpParameters = new BasicHttpParams();
// HttpConnectionParams.setConnectionTimeout(httpParameters, 10*1000);//设置请求超时10秒
// HttpConnectionParams.setSoTimeout(httpParameters, 10*1000); //设置等待数据超时10秒
// HttpConnectionParams.setSocketBufferSize(httpParameters, 8192); //套接字大小
// HttpClient httpclient = new DefaultHttpClient(httpParameters); //此时构造DefaultHttpClient时将参数传入
HttpClient httpclient = new DefaultHttpClient();//主要对象
String strResult = "";//响应结果
StringBuffer sbf = new StringBuffer();//结果集合
HttpResponse response = null;
try {
//额外参数赋值
List<NameValuePair> nameValuePairs= new ArrayList<NameValuePair>();
if(null!=parm){for (String in : parm.keySet()) {
nameValuePairs.add(new BasicNameValuePair(in, parm.get(in)));//(name 张三)
}}
//GET或POST
if(!ISNull(RequestMethod)){
if("GET".equals(RequestMethod.toUpperCase())){
String baseUrlNew = baseUrl;
if(nameValuePairs.size()>0){baseUrlNew = baseUrl + URLEncodedUtils.format(nameValuePairs, CharsetRequest);}//按照字符集对请求参数进行编码,暂时固定
HttpGet httpget = new HttpGet(baseUrlNew);
httpget.addHeader("Content-type","application/x-www-form-urlencoded");
response = httpclient.execute(httpget);
}else if("POST".equals(RequestMethod.toUpperCase())) {
HttpPost httppost = new HttpPost(baseUrl);
httppost.addHeader("Content-type","application/x-www-form-urlencoded");
if(nameValuePairs.size()>0){httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, CharsetRequest));}//按照字符集对请求参数进行编码,暂时固定
response = httpclient.execute(httppost);
}
}
//结果流封装为字符串
if (response.getStatusLine().getStatusCode() == 200) {//状态200是成功
InputStream ins = response.getEntity().getContent();//读返回数据
BufferedReader br = new BufferedReader(new InputStreamReader(ins, CharsetResponse));// 按指定的字符集解析响应字符串
String line = null;
while ((line = br.readLine()) != null) { sbf.append(line); }
br.close();
} else {
String err = response.getStatusLine().getStatusCode() + "";
strResult += "发送失败:" + err;
System.out.println(strResult);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return sbf.toString();
}
public static boolean ISNull(String para) {
if("".equals(para) || null== para){
return true;
}return false;
}
}
结果展示
<!DOCTYPE html><!--STATUS OK--> <html> <head> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <meta http-equiv="content-type" content="text/html;charset=utf-8"> <meta content="always" name="referrer"> <meta name="theme-color" content="#2932e1"> <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" /> <link rel="icon" sizes="any" mask href="//www.baidu.com/img/baidu.svg"> <link rel="search" type="application/opensearchdescription+xml" href="/content-search.xml" title="百度搜索" /> <title>王_百度搜索</title> ...等等