urlconnection和httpclient

urlconnection:

String urlAddress = "http://192.168.1.102:8080/AndroidServer/login.do";
	URL url;
	HttpURLConnection uRLConnection;
	public UrlConnectionToServer(){

	}
	
	public String doGet(String username,String password){
		
		String getUrl = urlAddress + "?username="+username+"&password="+password;
		try {
			url = new URL(getUrl);
			uRLConnection = (HttpURLConnection)url.openConnection();
			InputStream is = uRLConnection.getInputStream();
			BufferedReader br = new BufferedReader(new InputStreamReader(is));
			String response = "";
			String readLine = null;
			while((readLine =br.readLine()) != null){
				//response = br.readLine();
				response = response + readLine;
			}
			is.close();
			br.close();
			uRLConnection.disconnect();
			return response;
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}
		
	}
	
	public String doPost(String username,String password){
		try {
			url = new URL(urlAddress);
			uRLConnection = (HttpURLConnection)url.openConnection();
			uRLConnection.setDoInput(true);
			uRLConnection.setDoOutput(true);
			uRLConnection.setRequestMethod("POST");
			uRLConnection.setUseCaches(false);
			uRLConnection.setInstanceFollowRedirects(false);
			uRLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
			uRLConnection.connect();
			
			DataOutputStream out = new DataOutputStream(uRLConnection.getOutputStream());
			String content = "username="+username+"&password="+password;
			out.writeBytes(content);
			out.flush();
			out.close();
			
			InputStream is = uRLConnection.getInputStream();
			BufferedReader br = new BufferedReader(new InputStreamReader(is));
			String response = "";
			String readLine = null;
			while((readLine =br.readLine()) != null){
				//response = br.readLine();
				response = response + readLine;
			}
			is.close();
			br.close();
			uRLConnection.disconnect();
			return response;
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}
		
	}

httpclient:

 String urlAddress = "http://192.168.1.102:8080/qualityserver/login.do";
	 public HttpClientServer(){
			
		}
		
	public String doGet(String username,String password){
		
		String getUrl = urlAddress + "?username="+username+"&password="+password;
		HttpGet httpGet = new HttpGet(getUrl);
		HttpParams hp = httpGet.getParams();
		hp.getParameter("true");
		//hp.
		//httpGet.setp
		HttpClient hc = new DefaultHttpClient();
		try {
			HttpResponse ht = hc.execute(httpGet);
			if(ht.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
				HttpEntity he = ht.getEntity();
				InputStream is = he.getContent();
				BufferedReader br = new BufferedReader(new InputStreamReader(is));
				String response = "";
				String readLine = null;
				while((readLine =br.readLine()) != null){
					//response = br.readLine();
					response = response + readLine;
				}
				is.close();
				br.close();
				
				//String str = EntityUtils.toString(he);
				System.out.println("========="+response);
				return response;
			}else{
				return "error";
			}
		} catch (ClientProtocolException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return "exception";
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return "exception";
		}
		
		
		
		
	}
	
	public String doPost(String username,String password){
		//String getUrl = urlAddress + "?username="+username+"&password="+password;
		HttpPost httpPost = new HttpPost(urlAddress);
		List params = new ArrayList();
		NameValuePair pair1 = new BasicNameValuePair("username", username);
		NameValuePair pair2 = new BasicNameValuePair("password", password);
		params.add(pair1);
		params.add(pair2);
		
		 
		HttpEntity he;
		try {
			he = new UrlEncodedFormEntity(params, "gbk");
			httpPost.setEntity(he);
			
		} catch (UnsupportedEncodingException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		} 
		
		
		HttpClient hc = new DefaultHttpClient();
		try {
			HttpResponse ht = hc.execute(httpPost);
			//连接成功
			if(ht.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
				HttpEntity het = ht.getEntity();
				InputStream is = het.getContent();
				BufferedReader br = new BufferedReader(new InputStreamReader(is));
				String response = "";
				String readLine = null;
				while((readLine =br.readLine()) != null){
					//response = br.readLine();
					response = response + readLine;
				}
				is.close();
				br.close();
				
				//String str = EntityUtils.toString(he);
				System.out.println("=========&&"+response);
				return response;
			}else{
				return "error";
			}
		} catch (ClientProtocolException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return "exception";
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return "exception";
		}
		
	}

servlet端json转化：

resp.setContentType("text/json");
		resp.setCharacterEncoding("UTF-8");
		toDo = new ToDo();
		List<UserBean> list = new ArrayList<UserBean>();
			list = toDo.queryUsers(mySession);
			String body;
		try
		{
			//设定JSON
			JSONArray array = new JSONArray();
			for(UserBean bean : list)
			{
				JSONObject obj = new JSONObject();
				try
				{
					obj.put("username", bean.getUserName());
					obj.put("password", bean.getPassWord());
				}catch(Exception e){}
				array.add(obj);
			}
			pw.write(array.toString());
			System.out.println(array.toString());

android端接收：

String urlAddress = "http://192.168.1.102:8080/qualityserver/result.do";
		String body = 
			getContent(urlAddress);
		JSONArray array = new JSONArray(body);			
		for(int i=0;i<array.length();i++)
		{
			obj = array.getJSONObject(i);
			sb.append("用户名:").append(obj.getString("username")).append("\t");
			sb.append("密码:").append(obj.getString("password")).append("\n");
			
			HashMap<String, Object> map = new HashMap<String, Object>();
        	try {
				userName = obj.getString("username");
				passWord = obj.getString("password");
			} catch (JSONException e) {
				e.printStackTrace();
			}
        	map.put("username", userName);
        	map.put("password", passWord);
        	listItem.add(map);
			
		}
		
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
        
        if(sb!=null)
        {
        	showResult.setText("用户名和密码信息：");
        	showResult.setTextSize(20);
        } else
			extracted();
 
       //设置adapter 
        SimpleAdapter simple = new SimpleAdapter(this,listItem,
        		android.R.layout.simple_list_item_2,
        		new String[]{"username","password"},
        		new int[]{android.R.id.text1,android.R.id.text2});
        listResult.setAdapter(simple);
        
        listResult.setOnItemClickListener(new OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				int positionId = (int) (id+1);
				Toast.makeText(MainActivity.this, "ID："+positionId, Toast.LENGTH_LONG).show();
			
			}
		});
    }
	private void extracted() {
		showResult.setText("没有有效的数据！");
	}
	//和服务器连接
    private String getContent(String url)throws Exception{
    	StringBuilder sb = new StringBuilder();
    	HttpClient client =new DefaultHttpClient();
    	HttpParams httpParams =client.getParams();
    	
    	HttpConnectionParams.setConnectionTimeout(httpParams, 3000);
    	HttpConnectionParams.setSoTimeout(httpParams, 5000);
    	HttpResponse response = client.execute(new HttpGet(url));
    	HttpEntity entity =response.getEntity();
    	
    	if(entity !=null){
    		BufferedReader reader = new BufferedReader(new InputStreamReader
    				(entity.getContent(),"UTF-8"),8192);
    		String line =null;
    		while ((line= reader.readLine())!=null){
    			sb.append(line +"\n");
    		}
    		reader.close();
    	}
    	return sb.toString();
    }

数据库查询信息：

 while(rs.next())
                {
                	UserBean bean = new UserBean();
                	bean.setUserName(rs.getString(1));
                	bean.setPassWord(rs.getString(2));
                	list.add(bean);
                }
                return list;