http请求封装

import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import org.apache.http.HttpResponse;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;public class HttpUtil {public static final String HOST="http://192.168.0.115/";//通过url获得HttpGet对象public static HttpGet getHttpGet(String url){//实例化HttpGetHttpGet request = new HttpGet(url);return request;}//通过URL获得HttpPost对象public static HttpPost getHttpPost(String url){//实例化HttpPost    HttpPost request = new HttpPost(url);    return request;}//通过HttpGet获得HttpResponse对象public static HttpResponse getHttpResponse(HttpGet request) throws ClientProtocolException,IOException{   //实例化HttpResponseHttpResponse response = new DefaultHttpClient().execute(request);return response;}//通过HttpPost获得HttpResponse对象public static HttpResponse getHttpResponse(HttpPost request) throws ClientProtocolException,IOException{//实例化HttpResponseHttpResponse response = new DefaultHttpClient().execute(request);return response;}//通过url发送post请求，返回请求结果public static String queryStringForPost(String url){//获得HttpPost实例HttpPost request = HttpUtil.getHttpPost(url);String result = null;try{//获得HttpResponse实例HttpResponse response = HttpUtil.getHttpResponse(request); //判断是否请求成功//if(response.getStatusLine().getStatusCode() ==200){//获得返回结果result = EntityUtils.toString(response.getEntity());return result;//}}catch(ClientProtocolException e){e.printStackTrace();    result = "网络异常!";    return result;}catch(IOException e){e.printStackTrace();result = "网络异常!";return result;} }//通过url发送get请求，返回请求结果public static String queryStringForGet(String url){//获得HttpGet实例HttpGet request = HttpUtil.getHttpGet(HOST+url);String result = null;try{//获得HttpResponse实例HttpResponse response = HttpUtil.getHttpResponse(request);//判断是否请求成功//if(response.getStatusLine().getStatusCode()==200){//获得返回结果result = EntityUtils.toString(response.getEntity());//result = EntityUtils.toString(response.getEntity(),"UTF-8");return result;//}}catch(ClientProtocolException e){e.printStackTrace();result = "网络异常!";return result;}catch(IOException e){e.printStackTrace();result = "网络异常!";return result;}//return null;}//通过HttpPost发送Post请求，返回请求结果public static String queryStringForPost(HttpPost request){String result = null;try{//获得HttpResponse实例HttpResponse response = HttpUtil.getHttpResponse(request);//判断是否请求成功//if(response.getStatusLine().getStatusCode()==200){//获得请求结果result = EntityUtils.toString(response.getEntity());return result;//}}catch(ClientProtocolException e){e.printStackTrace();result = "网络异常!";return result;}catch(IOException e){e.printStackTrace();result = "网络异常!";return result;}//return null;}//通过HttpGet发送Get请求，返回请求结果public static String queryStringForGet(HttpGet request){String result = null;try{ //获得HttpResponse实例HttpResponse response = HttpUtil.getHttpResponse(request);//判断是否请求成功//if(response.getStatusLine().getStatusCode()==200){//获得请求结果result = EntityUtils.toString(response.getEntity());return result;//}}catch(ClientProtocolException e){e.printStackTrace();result = "网络异常!";return result;}catch(IOException e){e.printStackTrace();result = "网络异常!";return result;}//return null;}public static InputStream GetInputStreamFromURL(String urlstr){    HttpURLConnection connection;    URL url;    InputStream stream=null;    try{    url=new URL(urlstr);    connection =(HttpURLConnection)url.openConnection();    connection.connect();    stream = connection.getInputStream();    }catch(MalformedURLException e){    e.printStackTrace();    }catch(IOException e1){    e1.printStackTrace();    }    return stream;    }}