三种POST和GET的提交方式.doc

三种POST和GET的提交方式 向服务器提交数据有两种方式，post和get。两者的区别主要有三点，安全性、长度限制、数据结构。其中get请求安全性相比较而言较差，数据长度受浏览器地址栏限制，没有方法体。两种都是较为重要的数据提交方式。现简单介绍一下三种post和get的提交方式。无论是哪种方法实现post和get，get 的访问路径都要携带数据，而post提交是把数据放在方法体中。 普通方法实现get/post提交： 严格遵照Http协议进行数据传输。在安卓开发环境下，由于主线程不能进行网络访问，因此需要在开启一个子线程向服务器提交数据。为了更加直观的观察数据，可以在程序屏幕上显示服务器反馈信息。又由于子线程无法更改UI界面，因此需要引入Hnndler代理器。实现get/post提交基本步骤就是，获取URL路径，根据路径得到Http连接，用HttpURLConnection对象设置相关的http配置信息、提交方式以及获取反馈码。当响应码为200时表示提交成功，可以通过HttpURLConnection以流的形式获取反馈信息。 普通GRT提交方式：public void load(View view) final String qq = et_qq.getText().toString().trim(); final String pwd = et_pwd.getText().toString().trim(); if (TextUtils.isEmpty(qq) | TextUtils.isEmpty(pwd) Toast.makeText(MainActivity.this, qq号或密码为空, 0).show(); return; final String path = 14:8080/qqload/qqload?qq= + qq + &pwd= + pwd; new Thread() public void run() try URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url .openConnection(); conn.setRequestMethod(GET); conn.setReadTimeout(5000); int code = conn.getResponseCode(); if (code = 200) InputStream is = conn.getInputStream(); String result = StreamTools.ReadStream(is); Message msg = Message.obtain(); msg.what = SUCCESS; msg.obj = result; handler.sendMessage(msg); else Message msg = Message.obtain(); msg.what = ERROR1; handler.sendMessage(msg); catch (Exception e) / TODO Auto-generated catch block e.printStackTrace(); Message msg = Message.obtain(); msg.what = ERROR2; handler.sendMessage(msg); .start(); 普通POST提交方式：复制代码public void load(View view) final String qq = et_qq.getText().toString().trim(); final String pwd = et_pwd.getText().toString().trim(); if (TextUtils.isEmpty(qq) | TextUtils.isEmpty(pwd) Toast.makeText(MainActivity.this, qq号或密码为空, 0).show(); return; final String path = 14:8080/qqload/qqload; new Thread() public void run() try URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url .openConnection(); conn.setRequestMethod(POST); conn.setReadTimeout(5000); conn.setRequestProperty(Content-Type, application/x-www-form-urlencoded); String data = qq=+URLEncoder.encode(qq,utf-8)+&pwd= + URLEncoder.encode(pwd,utf-8); conn.setRequestProperty(Content-Length,String.valueOf(data.length(); etDoOutput(true); conn.getOutputStream().write(data.getBytes(); int code = conn.getResponseCode(); if (code = 200) InputStream is = conn.getInputStream(); String result = StreamTools.ReadStream(is); Message msg = Message.obtain(); msg.what = SUCCESS; msg.obj = result; handler.sendMessage(msg); else Message msg = Message.obtain(); msg.what = ERROR1; handler.sendMessage(msg); catch (Exception e) / TODO Auto-generated catch block e.printStackTrace(); Message msg = Message.obtain(); msg.what = ERROR2; handler.sendMessage(msg); .start(); 复制代码 用httpclien实现get/post提交的只需要一下几个步骤： 1. 创建HttpClient对象，实现打开浏览器的功能 HttpClient client = new DefaultHttpClient(); 2. 输入地址或者数据 ，用到HttpGet()或HttpPost(),传入要访问的路径，得到HttpGet或HttpPost对象。 HttpGet httpGet = new HttpGet(path);3. 把获得的HttpGet或HttpPost对象发送到服务器，实现敲回车的功能，得到HttpResponse对象。HttpResponse response = client.execute(httpGet);4. 得到HttpResponse对象获取状态行中的状态码，判断状态码状态码。 int code = response.getStatusLine().getStatusCode();5. 同样用HttpResponse对象获取相应内容，存入流对象。最后将得到的流对象转为字符串进行显示。InputStream is = response.getEntity().getContent();其中要注意的一点是用post请求时要传递值所以要多出一个步骤。具体而言，先创建一个list集合，集合的泛型用NameValuePair表示，类似于键值对的形式存储要传递的数据。接着向集合中添加要提交数据。最后用HttpPost对象把集合存入请求体中。 用HttpClient实现GET提交：复制代码public void load(View view) final String qq = et_qq.getText().toString().trim(); final String pwd = et_pwd.getText().toString().trim(); if (TextUtils.isEmpty(qq) | TextUtils.isEmpty(pwd) Toast.makeText(MainActivity.this, qq号或密码为空, 0).show(); return; final String path = 14:8080/qqload/qqload?qq= + qq + &pwd= + pwd; new Thread() public void run() try HttpClient client = new DefaultHttpClient(); HttpGet httpget = new HttpGet(path); HttpResponse response = client.execute(httpget); int code = response.getStatusLine().getStatusCode(); if (code = 200) InputStream is = response.getEntity().getContent(); String result = StreamTools.ReadStream(is); Message msg = Message.obtain(); msg.what = SUCCESS; msg.obj = result; handler.sendMessage(msg); else Message msg = Message.obtain(); msg.what = ERROR1; handler.sendMessage(msg); catch (Exception e) / TODO Auto-generated catch block e.printStackTrace(); Message msg = Message.obtain(); msg.what = ERROR2; handler.sendMessage(msg); .start(); 复制代码 用HttpClient实现POST提交： 复制代码 public void load(View view) final String qq = et_qq.getText().toString().trim(); final String pwd = et_pwd.getText().toString().trim(); if (TextUtils.isEmpty(qq) | TextUtils.isEmpty(pwd) Toast.makeText(MainActivity.this, qq号或密码为空, 0).show(); return; final String path = 14:8080/qqload/qqload; new Thread() public void run() try HttpClient client = new DefaultHttpClient(); HttpPost httppost = new HttpPost(path); List parameter = new ArrayList(); parameter.add(new BasicNameValuePair(qq, qq); parameter.add(new BasicNameValuePair(pwd, pwd); httppost.setEntity(new UrlEncodedFormEntity(parameter,utf-8); HttpResponse response = client.execute(httppost); int code = response.getStatusLine().getStatusCode(); if (code = 200) InputStream is = response.getEntity().getContent(); String result = StreamTools.ReadStream(is); Message msg = Message.obtain(); msg.what = SUCCESS; msg.obj = result; handler.sendMessage(msg); else Message msg = Message.obtain(); msg.what = ERROR1; handler.sendMessage(msg); catch (Exception e) / TODO Auto-generated catch block e.printStackTrace(); Message msg = Message.obtain(); msg.what = ERROR2; handler.sendMessage(msg); .start(); 复制代码 使用开源框架实现get/post提交： 利用框架实现get/post提交不需要再开启子线程。直接在主线程进行get/post的提交，大大的减少了工作量。但操作前需要导包。然后直接创建一个AsyncHttpClient对象，用AsyncHttpClient对象的post方法和get方法，发送请求，并在AsyncHttpResponseHandler()对象中获得相应信息。同样若是post请求，仍旧需要传递值。这里可以用RequestParams对象添加要传递的值。 在文件下添加jar包： 用开源框架实现GET提交：复制代码public void load(View view) final String qq = et_qq.getText().toString().trim(); final String pwd = et_pwd.getText().toString().trim(); if (TextUtils.isEmpty(qq) | TextUtils.isEmpty(pwd) Toast.makeText(MainActivity.this, qq号或密码为空, 0).show(); return; final String path = 14:8080/qqload/qqload?qq= + qq + &pwd= + pwd; AsyncHttpClient client = new AsyncHttpClient(); client.get(path, new AsyncHttpResponseHandler() Override public void onSuccess(int statusCode, Header headers, byte responseBody) / TODO Agenerated method stub tv_result.setText(new String(responseBody); Override public void onFailure(int statusCode, Header headers, byte responseBody, Throwable error) / TODO Auto-generated method stub tv_result.setText(错误原因： + new String(responseBody); ); 复制代码 用开源框架实现POST请求：复制代码 public void load(View view) final String qq = et_qq.getText().toString().trim(); f