通信android 客户端 与 web 服务器通信

引用：http://guaicaifeiben.iteye.com/blog/825426

package baiduchuan.malata.store.net;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
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.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;

import baiduchuan.malata.store.utils.LogUtil;
import baiduchuan.malata.store.utils.StoreConstUtils;

public class HttpConManager 
{
 private static HttpConManager intance=null;
 public static HttpConManager GetIntance()
 {
  if(intance==null)
   intance=new HttpConManager();
  return intance;
 }

 /**
  * http数据通道 
  * @param httpurl
  * @return
  */
 private HttpURLConnection getHttpconnect(String httpurl)
 {
  HttpURLConnection con=null;
  try
  {
   URL url =new URL(httpurl);
   con=(HttpURLConnection)url.openConnection();
   con.setDoOutput(true);//使用 URL 连接进行输出
   con.setDoInput(true);//使用 URL 连接进行输入
   con.setUseCaches(false);//忽略缓存
   con.setRequestMethod("POST");//设置URL请求方法
   con.setRequestProperty("Charset", "UTF-8");
   con.setRequestProperty("Content-type", "application/json");
   con.connect();
   con.setConnectTimeout(1);
   con.setReadTimeout(1);
  }
  catch(IOException e1)
  {
   LogUtil.log("HttpConManager getJsonData IOE", 4, e1.getMessage());
  }
  catch(Exception e2)
  {
   LogUtil.log("HttpConManager getJsonData E", 4, e2.getMessage());
  }
  return con;
 }

 /**
  * 客户端从服务端接收json格式数据
  * @param httpurl 
  * @return
  */
 public JSONObject getJsonData(String httpurl)
 {
  JSONObject jsonData=null;
  try
  {
   HttpURLConnection con=getHttpconnect(httpurl);
   int rescode=con.getResponseCode();
   if(HttpURLConnection.HTTP_OK==rescode)
   {
    InputStream input=con.getInputStream();
    int inputLength=input.available();
    byte[] buffer=new byte[inputLength];
    int offset=0;
    int length=0;
    ByteArrayOutputStream output=new ByteArrayOutputStream();
    while((offset=input.read(buffer,0,inputLength))!=-1)
     length +=offset;
    output.write(buffer,0,length);
    String str=new String(output.toByteArray());
    jsonData=new JSONObject(str);
    output.close();
    input.close();
    buffer=null;
    con.disconnect();
   }
  }
  catch(IOException e1)
  {
   LogUtil.log("HttpConManager getJsonData IOE", 4, e1.getMessage());
  }
  catch(JSONException e2)
  {
   LogUtil.log("HttpConManager getJsonData JSONE", 4, e2.getMessage());
  }
  catch(Exception e3)
  {
   LogUtil.log("HttpConManager getJsonData E", 4, e3.getMessage());
  }
  return jsonData;
 }
 
 /**
  * 客户端从服务端接收String类型数据
  * @param httpurl 
  * @return
  */
 public String getStringData(String httpurl)
 {
  String value="";
  try
  {
   HttpURLConnection con=getHttpconnect(httpurl);
   int rescode=con.getResponseCode();
   if(HttpURLConnection.HTTP_OK==rescode)
   {
    InputStream input=con.getInputStream();
    int inputLength=input.available();
    byte[] buffer=new byte[inputLength];
    int offset=0;
    int length=0;
    ByteArrayOutputStream output=new ByteArrayOutputStream();
    while((offset=input.read(buffer,0,inputLength))!=-1)
     length +=offset;
    output.write(buffer,0,length);
    value=new String(output.toByteArray());
    output.close();
    input.close();
    buffer=null;
    con.disconnect();
   }
  }
  catch(IOException e1)
  {
   LogUtil.log("HttpConManager getStringData IOE", 4, e1.getMessage());
  }
  catch(Exception e2)
  {
   LogUtil.log("HttpConManager getStringData E", 4, e2.getMessage());
  }
  return value;
 }
  

 /**
  * 客户端发送数据给服务端
  * @param httpurl
  * @param strkey
  * @param strValue StringBuffer类型
  */
 public void sendPostData(String httpurl,String strkey,StringBuffer strValue)
 {
  HttpClient httpClient=new DefaultHttpClient();
  HttpPost httpPost=new HttpPost(httpurl);
  try 
  { 
   List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 
   nameValuePairs.add(new BasicNameValuePair(strkey, strValue.toString())); 
   httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
   httpClient.execute(httpPost); 
  } 
  catch (ClientProtocolException e) 
  { 
   e.printStackTrace();

  } catch (IOException e) 
  { 
   e.printStackTrace(); 
  } 
 }
 
 /**
  * 客户端发送数据给服务端
  * @param httpurl
  * @param strkey
  * @param strValue 字符串
  */
 public void sendPostData(String httpurl,String strkey,String strValue)
 {
  HttpClient httpClient=new DefaultHttpClient();
  HttpPost httpPost=new HttpPost(httpurl);
  try 
  { 
   List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 
   nameValuePairs.add(new BasicNameValuePair(strkey, strValue)); 
   httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
   httpClient.execute(httpPost); 
  } 
  catch (ClientProtocolException e) 
  { 
   e.printStackTrace();

  } catch (IOException e) 
  { 
   e.printStackTrace(); 
  } 
 }
 
 /***
  * post通信方式并且返回JSON格式的数据
  * @param httpUrl 访问的URL地址
  * @param strKey 相当于&key=中的key
  * @param strValue StringBuffer类型的参数
  * @return
  */
 public JSONObject sendPostDataAndResult(String httpUrl,String strKey,StringBuffer strValue)
 {
  JSONObject jsonObj=null;
  HttpClient httpClient=new DefaultHttpClient();
  HttpPost httpPost=new HttpPost(httpUrl);
  try
  {
   List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 
   nameValuePairs.add(new BasicNameValuePair(strKey, strValue.toString())); 
   httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
   HttpResponse httpResponse=httpClient.execute(httpPost); 
   HttpEntity httpEntity=httpResponse.getEntity();
   String str=EntityUtils.toString(httpEntity);
   try {
    jsonObj=new JSONObject(str);
   } catch (JSONException e) {
    LogUtil.log("sendPostDataAndResult", 4, e.getMessage());
   } 
  }
  catch (ClientProtocolException e) 
  { 
   e.printStackTrace();

  } catch (IOException e) 
  { 
   e.printStackTrace(); 
  }
  return jsonObj;
 }
 
 /***
  * post通信方式并且返回JSON格式的数据
  * @param httpUrl 访问的URL地址
  * @param strKey 相当于&key=中的key
  * @param strValue String类型的参数
  * @return
  */
 public JSONObject sendPostDataAndResult(String httpUrl,String strKey,String strValue)
 {
  JSONObject jsonObj=null;
  HttpClient httpClient=new DefaultHttpClient();
  HttpPost httpPost=new HttpPost(httpUrl);
  try
  {
   List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 
   nameValuePairs.add(new BasicNameValuePair(strKey, strValue)); 
   httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
   HttpResponse httpResponse=httpClient.execute(httpPost); 
   HttpEntity httpEntity=httpResponse.getEntity();
   String str=EntityUtils.toString(httpEntity);
   try {
    jsonObj=new JSONObject(str);
   } catch (JSONException e) {
    LogUtil.log("sendPostDataAndResult", 4, e.getMessage());
   } 
  }
  catch (ClientProtocolException e) 
  { 
   e.printStackTrace();

  } catch (IOException e) 
  { 
   e.printStackTrace(); 
  }
  return jsonObj;
 }
 
 
 /**
  * 检查网络是否可用
  * @return
  */
 public boolean checkNetwork()
 {
  HttpURLConnection con=getHttpconnect(StoreConstUtils.Store_Url_Domain);
  try 
  {
   int rescode=con.getResponseCode();
   if(HttpURLConnection.HTTP_OK==rescode)
    return true;
   else
    return false;
  } 
  catch (IOException e) 
  {
   LogUtil.log("checkNetwork", 4, e.getMessage());
  }
  return false;
 }

}