HttpClient与HttpURLConnection的提交数据

使用HttpClient提交数据（get）

//get提交
    public void click1(View view) throws Exception{

        final String username = et_text1.getText().toString().trim();
        final String password = et_text2.getText().toString().trim();

        if (TextUtils.isEmpty(username)&&TextUtils.isEmpty(password)) {
            Toast.makeText(this, "用户名和密码不能为空", Toast.LENGTH_SHORT).show();
            return;
        }

        new Thread(new Runnable() {

            @Override
            public void run() {
                try {
                    String path = "http://192.168.17.12:8080/http/loginServlet";

                    HttpClient client = new DefaultHttpClient();
                    //http://localhost:8080/http/loginServlet?username=123&password=111
                    HttpGet request = new HttpGet(path+"?username="+URLEncoder.encode(username)+"&password="+password);

                    HttpResponse response = client.execute(request);
                    StatusLine statusLine = response.getStatusLine();
                    int statusCode = statusLine.getStatusCode();

                    if (200==statusCode) {

                        HttpEntity entity = response.getEntity();
                        InputStream inputStream = entity.getContent();
                        String data = StreamUtils.stream2string(inputStream);
                        handler.obtainMessage(RESULT_OK, data).sendToTarget();
                    }else {
                        handler.obtainMessage(RESULT_CANCELED, "handler发送信息失败！").sendToTarget();
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }

            }
        }).start();
    }

使用HttpClient提交数据(post)

//post提交
    public void click2(View view){

        final String username = et_text1.getText().toString().trim();
        final String password = et_text2.getText().toString().trim();

        if (TextUtils.isEmpty(username)&&TextUtils.isEmpty(password)) {
            Toast.makeText(this, "用户名和密码不能为空", Toast.LENGTH_SHORT).show();
            return;
        }

        new Thread(new Runnable() {

            @Override
            public void run() {
                try {
                    String path = "http://192.168.17.12:8080/http/loginServlet";

                    HttpClient client = new DefaultHttpClient();
                    HttpPost request = new HttpPost(path);

                    List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();
                    parameters.add(new BasicNameValuePair("username", username));
                    parameters.add(new BasicNameValuePair("password", password));

                    HttpEntity entity = new UrlEncodedFormEntity(parameters );
                    request.setEntity(entity );

                    HttpResponse response = client.execute(request);
                    StatusLine statusLine = response.getStatusLine();
                    int statusCode = statusLine.getStatusCode();

                    if (200==statusCode) {

                        HttpEntity entity2 = response.getEntity();
                        InputStream content = entity2.getContent();
                        final String data = StreamUtils.stream2string(content);

                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(MainActivity.this,data+"提交成功", Toast.LENGTH_SHORT).show();
                            }
                        });
                    }else {

                        HttpEntity entity2 = response.getEntity();
                        InputStream content = entity2.getContent();
                        final String data = StreamUtils.stream2string(content);
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(MainActivity.this,data+"提交失败！！！", Toast.LENGTH_SHORT).show();
                            }
                        });
                    }

                } catch (Exception e) {
                    e.printStackTrace();
                }

            }
        }).start();
    }

    public class StreamUtils {

        public static String stream2string(InputStream is) throws IOException {

            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            int len=-1;
            byte[] buffer = new byte[1024];
            while((len=is.read(buffer))!=-1){
                bos.write(buffer, 0, len);
            }
            is.close();
            bos.close();
            return bos.toString();
        }

    }

使用HttpURLConnection提交数据(get)

//get提交
    public void click1(View view) throws Exception{

        final String username = et_text1.getText().toString().trim();
        final String password = et_text2.getText().toString().trim();

        if (TextUtils.isEmpty(username)&&TextUtils.isEmpty(password)) {
            Toast.makeText(this, "用户名和密码不能为空", Toast.LENGTH_SHORT).show();
            return;
        }

        new Thread(new Runnable() {

            @Override
            public void run() {
                try {
                    //http://localhost:8080/http/loginServlet?username=123&password=123
                    String path = "http://192.168.37.2:8080/http/loginServlet?username="+URLEncoder.encode(username)+"&password="+password;
                    URL url = new URL(path);
                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();

                    conn.setRequestMethod("GET");
                    conn.setReadTimeout(TIME_OUT);
                    conn.setConnectTimeout(TIME_OUT2);
                    conn.connect();

                    int responseCode = conn.getResponseCode();
                    if (200==responseCode) {
                        InputStream is = conn.getInputStream();
                        String data = StreamUtils.stream2string(is);
                        handler.obtainMessage(RESULT_OK, data).sendToTarget();
                    }else {
                        handler.obtainMessage(RESULT_CANCELED, "handler发送信息失败！").sendToTarget();
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }

            }
        }).start();

    }

使用HttpURLConnection提交数据(post)

    //post提交
    public void click2(View view){

        final String username = et_text1.getText().toString().trim();
        final String password = et_text2.getText().toString().trim();

        if (TextUtils.isEmpty(username)&&TextUtils.isEmpty(password)) {
            Toast.makeText(this, "用户名和密码不能为空", Toast.LENGTH_SHORT).show();
            return;
        }

        new Thread(new Runnable() {

            @Override
            public void run() {
                try {
                    String path = "http://192.168.37.2:8080/http/loginServlet";
                    URL url = new URL(path);
                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();

                    conn.setRequestMethod("POST");
                    conn.setDoOutput(true);

                    conn.setReadTimeout(TIME_OUT);
                    conn.setConnectTimeout(TIME_OUT2);
                    conn.connect();

                    //打开一个流给服务器提交数据
                    OutputStream os = conn.getOutputStream();
                    String param = "username="+URLEncoder.encode(username)+"&password="+password;
                    os.write(param.getBytes());



                    int responseCode = conn.getResponseCode();
                    if (200==responseCode) {
                        InputStream is = conn.getInputStream();
                        String data = StreamUtils.stream2string(is);
                        handler.obtainMessage(RESULT_OK, data).sendToTarget();
                    }else {
                        handler.obtainMessage(RESULT_CANCELED, "handler发送信息失败！").sendToTarget();
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }

            }
        }).start();
    }

HttpClient与HttpURLConnection区别

1、HttpClient是apache的开源实现，而HttpUrlConnection是安卓标准实现，安卓SDK虽然集成了HttpClient，但官方支持的却是HttpUrlConnection；
2、HttpUrlConnection直接支持GZIP压缩；HttpClient也支持，但要自己写代码处理；
3、HttpUrlConnection直接在系统层面做了缓存策略处理，加快重复请求的速度。